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Uceda RG, Cruz CM, Míguez-Lago S, de Cienfuegos LÁ, Longhi G, Pelta DA, Novoa P, Mota AJ, Cuerva JM, Miguel D. Can Magnetic Dipole Transition Moment Be Engineered? Angew Chem Int Ed Engl 2024; 63:e202316696. [PMID: 38051776 DOI: 10.1002/anie.202316696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 11/29/2023] [Accepted: 12/05/2023] [Indexed: 12/07/2023]
Abstract
The development of chiral compounds with enhanced chiroptical properties is an important challenge to improve device applications. To that end, an optimization of the electric and magnetic dipole transition moments of the molecule is necessary. Nevertheless, the relationship between chemical structure and such quantum mechanical properties is not always clear. That is the case of magnetic dipole transition moment (m) for which no general trends for its optimization have been suggested. In this work we propose a general rationalization for improving the magnitude of m in different families of chiral compounds. Performing a clustering analysis of hundreds of transitions, we have been able to identify a single group in which |m| value is maximized along the helix axis. More interestingly, we have found an accurate linear relationship (up to R2 =0.994) between the maximum value of this parameter and the area of the inner cavity of the helix, thus resembling classical behavior of solenoids. This research provides a tool for the rationalized synthesis of compounds with improved chiroptical responses.
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Affiliation(s)
- Rafael G Uceda
- Departamento de Química Orgánica, Unidad de Excelencia de Química Aplicada a la Biomedicina y Medioambiente (UEQ), Universidad de Granada (UGR), Facultad de Ciencias C. U. Fuentenueva, 18071, Granada, Spain
| | - Carlos M Cruz
- Departamento de Química Orgánica, Unidad de Excelencia de Química Aplicada a la Biomedicina y Medioambiente (UEQ), Universidad de Granada (UGR), Facultad de Ciencias C. U. Fuentenueva, 18071, Granada, Spain
| | - Sandra Míguez-Lago
- Departamento de Química Orgánica, Unidad de Excelencia de Química Aplicada a la Biomedicina y Medioambiente (UEQ), Universidad de Granada (UGR), Facultad de Ciencias C. U. Fuentenueva, 18071, Granada, Spain
| | - Luis Álvarez de Cienfuegos
- Departamento de Química Orgánica, Unidad de Excelencia de Química Aplicada a la Biomedicina y Medioambiente (UEQ), Universidad de Granada (UGR), Facultad de Ciencias C. U. Fuentenueva, 18071, Granada, Spain
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123, Brescia, Italy
| | - David A Pelta
- Departamento de Ciencias de la Computación e Inteligencia Artificial, UGR C/Periodista Daniel Saucedo Aranda S/N, 18071, Granada, Spain
| | - Pavel Novoa
- Departamento de Ciencias de la Computación e Inteligencia Artificial, UGR C/Periodista Daniel Saucedo Aranda S/N, 18071, Granada, Spain
| | - Antonio J Mota
- Departamento de Química Inorgánica, UEQ, UGR, Facultad de Ciencias C. U. Fuentenueva, 18071, Granada, Spain
| | - Juan M Cuerva
- Departamento de Química Orgánica, Unidad de Excelencia de Química Aplicada a la Biomedicina y Medioambiente (UEQ), Universidad de Granada (UGR), Facultad de Ciencias C. U. Fuentenueva, 18071, Granada, Spain
| | - Delia Miguel
- Departamento de Fisicoquímica, UEQ, UGR, Facultad de Farmacia Avda. Profesor Clavera S/N, 18071, Granada, Spain
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Zabala-Lekuona A, Landart-Gereka A, Quesada-Moreno MM, Mota AJ, Díaz-Ortega IF, Nojiri H, Krzystek J, Seco JM, Colacio E. Zero-Field SMM Behavior Triggered by Magnetic Exchange Interactions and a Collinear Arrangement of Local Anisotropy Axes in a Linear Co 3II Complex. Inorg Chem 2023. [PMID: 37991724 DOI: 10.1021/acs.inorgchem.3c02817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
A new linear trinuclear Co(II)3 complex with a formula of [{Co(μ-L)}2Co] has been prepared by self-assembly of Co(II) ions and the N3O3-tripodal Schiff base ligand H3L, which is obtained from the condensation of 1,1,1-tris(aminomethyl)ethane and salicylaldehyde. Single X-ray diffraction shows that this compound is centrosymmetric with triple-phenolate bridging groups connecting neighboring Co(II) ions, leading to a paddle-wheel-like structure with a pseudo-C3 axis lying in the Co-Co-Co direction. The Co(II) ions at both ends of the Co(II)3 molecule exhibit distorted trigonal prismatic CoN3O3 geometry, whereas the Co(II) at the middle presents an elongated trigonal antiprismatic CoO6 geometry. The combined analysis of the magnetic data and theoretical calculations reveal strong easy-axis magnetic anisotropy for both types of Co(II) ions (|D| values higher than 115 cm-1) with the local anisotropic axes lying on the pseudo-C3 axis of the molecule. The magnetic exchange interaction between the middle and ends Co(II) ions, extracted by using either a Hamiltonian accounting for the isotropic magnetic coupling and ZFS or the Lines' model, was found to be medium to strong and antiferromagnetic in nature, whereas the interaction between the external Co(II) ions is weak antiferromagnetic. Interestingly, the compound exhibits slow relaxation of magnetization and open hysteresis at zero field and therefore SMM behavior. The significant magnetic exchange coupling found for [{Co(μ-L)}2Co] is mainly responsible for the quenching of QTM, which combined with the easy-axis local anisotropy of the CoII ions and the collinearity of their local anisotropy axes with the pseudo-C3 axis favors the observation of SMM behavior at zero field.
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Affiliation(s)
- Andoni Zabala-Lekuona
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco (UPV/EHU), 20018 Donostia-San Sebastián, Spain
| | - Aritz Landart-Gereka
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - María Mar Quesada-Moreno
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Antonio J Mota
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Ismael F Díaz-Ortega
- Institute for Materials Research, Tohoku University, Katahira, Sendai 980-8577, Japan
| | - Hiroyuki Nojiri
- Institute for Materials Research, Tohoku University, Katahira, Sendai 980-8577, Japan
| | - Jurek Krzystek
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - José M Seco
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco (UPV/EHU), 20018 Donostia-San Sebastián, Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
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3
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Kumar A, Rajput A, Kaur P, Verma I, Erande RD, Javed S, Kłak J, Alrebei SF, Mota AJ, Colacio E, Arora H. Experimental and theoretical magnetostructural studies on discrete heterometallic cyanide-bridged dinuclear Fe IIIMn II and tetranuclear FeIII2CuII2 complexes bearing tripodal pyrazolyl borate and tetradentate phenolate-based ligands. Dalton Trans 2023; 52:7225-7238. [PMID: 37166056 DOI: 10.1039/d3dt00604b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Two new complexes [FeIII(Tp)(CN)2(μ-CN)MnIICl(HL1)]·3DMF (1) and {[FeIII(Tp)(CN)(μ2-NC)2CuII(HL2)](ClO4)}2·6DMF (2) (HL1 = 2-((((1-methylbenzimidazol-2-yl)methyl)(pyridin-2-ylmethyl)amino)methyl)phenol and HL2 = 2-(((pyridin-2-ylmethyl)(quinolin-2-ylmethyl)-amino)methyl)phenol) have been synthesized and characterized by elemental analysis and IR and UV/vis spectroscopy. Structural analysis revealed that 1 is a discrete dinuclear coordination complex and 2 is a discrete tetranuclear coordination complex. In complex 1, each MnII is in a distorted octahedral MN4OCl environment where coordination is satisfied by three nitrogen atoms and one oxygen atom of the ligand, and a chloride group and one nitrogen atom from cyanide. In complex 2, each Cu is in a distorted octahedral MN5O environment where coordination is satisfied by three nitrogen atoms and one oxygen atom of the ligand, and two nitrogen atoms from two cyanides. Direct current (dc) variable-temperature magnetic susceptibility measurements on polycrystalline samples of 1 and 2 were carried out in the temperature range of 1.8-300 K. Investigation of the magnetic properties reveals the occurrence of weak antiferromagnetic coupling between the low-spin FeIII (S = 1/2) ions and high-spin MnII (S = 5/2) ions in 1, while 2 exhibits ferro- and antiferromagnetic coupling between the metal ions in the tetranuclear CuII2FeIII2 unit. DFT calculations show ferromagnetic coupling in both complexes, although this appears to be weak in the case of complex 1. In addition, magnetostructural correlations reveal the magnetic behavior against Mn-N-C and Fe-C-N angles in 1 and Cu-N-C and Fe-C-N angles in 2.
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Affiliation(s)
- Akhilesh Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Amit Rajput
- Department of Chemistry, J. C. Bose University of Science & Technology, YMCA, Faridabad 121006, India
| | - Pawanjeet Kaur
- School of Engineering and Sciences, G.D. Goenka University, Gurugram, India.
| | - Indresh Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Rohan D Erande
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur 342037, India
| | - Saleem Javed
- Department of Chemistry, Faculty of Natural Science, Jamia Milia Islamia, Delhi 110025, India
| | - Julia Kłak
- Faculty of Chemistry, University of Wroclaw, Wroclaw 50-383, Poland
| | - Shefa' F Alrebei
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - Antonio J Mota
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - Enrique Colacio
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - Himanshu Arora
- School of Engineering and Sciences, G.D. Goenka University, Gurugram, India.
- Department of Chemistry, Faculty of Science, Central University of Allahabad, Prayagraj, Uttar Pradesh 211002, India
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Medina-Carmona E, Gutierrez-Rus LI, Manssour-Triedo F, Newton MS, Gamiz-Arco G, Mota AJ, Reiné P, Cuerva JM, Ortega-Muñoz M, Andrés-León E, Ortega-Roldan JL, Seelig B, Ibarra-Molero B, Sanchez-Ruiz JM. Cell Survival Enabled by Leakage of a Labile Metabolic Intermediate. Mol Biol Evol 2023; 40:7036845. [PMID: 36788592 PMCID: PMC9989741 DOI: 10.1093/molbev/msad032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 01/19/2023] [Accepted: 02/07/2023] [Indexed: 02/16/2023] Open
Abstract
Many metabolites are generated in one step of a biochemical pathway and consumed in a subsequent step. Such metabolic intermediates are often reactive molecules which, if allowed to freely diffuse in the intracellular milieu, could lead to undesirable side reactions and even become toxic to the cell. Therefore, metabolic intermediates are often protected as protein-bound species and directly transferred between enzyme active sites in multi-functional enzymes, multi-enzyme complexes, and metabolons. Sequestration of reactive metabolic intermediates thus contributes to metabolic efficiency. It is not known, however, whether this evolutionary adaptation can be relaxed in response to challenges to organismal survival. Here, we report evolutionary repair experiments on Escherichia coli cells in which an enzyme crucial for the biosynthesis of proline has been deleted. The deletion makes cells unable to grow in a culture medium lacking proline. Remarkably, however, cell growth is efficiently restored by many single mutations (12 at least) in the gene of glutamine synthetase. The mutations cause the leakage to the intracellular milieu of a highly reactive phosphorylated intermediate common to the biosynthetic pathways of glutamine and proline. This intermediate is generally assumed to exist only as a protein-bound species. Nevertheless, its diffusion upon mutation-induced leakage enables a new route to proline biosynthesis. Our results support that leakage of sequestered metabolic intermediates can readily occur and contribute to organismal adaptation in some scenarios. Enhanced availability of reactive molecules may enable the generation of new biochemical pathways and the potential of mutation-induced leakage in metabolic engineering is noted.
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Affiliation(s)
- Encarnación Medina-Carmona
- Departamento de Quimica Fisica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain.,School of Biosciences, University of Kent, Canterbury, United Kingdom
| | - Luis I Gutierrez-Rus
- Departamento de Quimica Fisica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Fadia Manssour-Triedo
- Departamento de Quimica Fisica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Matilda S Newton
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN.,BioTechnology Institute, University of Minnesota, St Paul, MN
| | - Gloria Gamiz-Arco
- Departamento de Quimica Fisica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Antonio J Mota
- Departamento de Quimica Inorganica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Pablo Reiné
- Departamento de Quimica Organica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Juan Manuel Cuerva
- Departamento de Quimica Organica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Mariano Ortega-Muñoz
- Departamento de Quimica Organica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Eduardo Andrés-León
- Unidad de Bioinformática, Instituto de Parasitología y Biomedicina "Lopez Neyra", CSIC, Armilla, Granada, Spain
| | | | - Burckhard Seelig
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN.,BioTechnology Institute, University of Minnesota, St Paul, MN
| | - Beatriz Ibarra-Molero
- Departamento de Quimica Fisica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
| | - Jose M Sanchez-Ruiz
- Departamento de Quimica Fisica, Facultad de Ciencias, Unidad de Excelencia de Quimica Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, Granada, Spain
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5
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Richa, Kumar A, Verma I, Garg P, Erande RD, Javed S, Rajput A, Garcia CJG, Mota AJ, Arora H. Magnetic properties and pH-controlled reversible interconversion of μ-oxido into μ-hydroxido in oxo-carboxylato bridged iron(III) dimers: Theoretical and Experimental Insights. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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Agarwal P, Kumar A, Verma I, Khanum G, Siddiqui N, Choquesillo-Lazarte D, Mota AJ, Javed S, Arora H. Dinuclear Phenoxo-Bridged Nickel(II) and Copper(II) Complexes of Phenolate-Based Tripodal Ligand: Theoretical and Experimental Insights. Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2023.2173619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Pratibha Agarwal
- School of Engineering and Sciences, G. D. Goenka University, Gurugram, Haryana, India
| | - Akhilesh Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Indresh Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Ghazala Khanum
- S.O. S in Chemistry, Jiwaji University, Gwalior, Madhya Pradesh, India
| | - Nazia Siddiqui
- Department of Chemistry, Dayalbagh Educational Institute, Agra, Uttar Pradesh, India
| | | | - Antonio J. Mota
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, Granada, Spain
| | - Saleem Javed
- Department of Chemistry, University of Allahabad, Prayagraj, Uttar Pradesh, India
| | - Himanshu Arora
- School of Engineering and Sciences, G. D. Goenka University, Gurugram, Haryana, India
- Department of Chemistry, University of Allahabad, Prayagraj, Uttar Pradesh, India
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Oyarzabal I, Zabala-Lekuona A, Mota AJ, Palacios MA, Rodríguez-Diéguez A, Lorusso G, Evangelisti M, Rodríguez-Esteban C, Brechin EK, Seco JM, Colacio E. Magneto-thermal properties and slow magnetic relaxation in Mn(II)Ln(III) complexes: influence of magnetic coupling on the magneto-caloric effect. Dalton Trans 2022; 51:12954-12967. [PMID: 35960153 DOI: 10.1039/d2dt01869a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A family of Mn(II)Ln(III) dinuclear and tetranuclear complexes (Ln = Gd and Dy) has been prepared from the compartmental ligands N,N'-dimethyl-N,N'-bis(2-hydroxy-3-formyl-5-bromobenzyl)ethylenediamine (H2L1) and N,N',N''-trimethyl-N,N''-bis(2-hydroxy-3-methoxy-5-methylbenzyl)diethylenetriamine (H2L2). The Mn(II)Gd(III) complexes exhibit antiferromagnetic interactions between Mn(II) and Gd(III) ions in most cases, which are supported by Density Functional Theory (DFT) calculations. Experimental magneto-structural correlations carried out for the reported complexes and other related complexes found in bibliography show that the highest ferromagnetic coupling constants are observed in di-μ-phenoxido bridged complexes, which is due to the planarity of the Mn-(μ-O)2-Gd bridging fragment and to the high Mn-O-Gd angles. The effect of these angles has been studied by DFT calculations performed on a di-μ-phenoxido doubly bridged model. The magneto-thermal properties of the Mn(II)Gd(III) based complexes have also been measured, concluding that the magnitude of the Magneto-Caloric Effect (MCE) is due to the strength rather than to the nature of the magnetic coupling. Moreover, when two Mn(II)Gd(III) dinuclear units are connected by two carbonato-bridging ligands the MCE is enhanced, obtaining a maximum magnetic entropy change of 36.4 Jkg-1 K-1 at ΔB = 7 T and T = 2.2 K. On the other hand, one of the dinuclear Mn(II)Dy(III) complexes displays Single-Molecule Magnet (SMM) behaviour with an energy barrier of 14.8 K under an applied external field of 1000 Oe.
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Affiliation(s)
- Itziar Oyarzabal
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain. .,IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain
| | - Andoni Zabala-Lekuona
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia, Spain.
| | - Antonio J Mota
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain.
| | - María A Palacios
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain.
| | - Antonio Rodríguez-Diéguez
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain.
| | - Giulia Lorusso
- CNR - Istituto per la Microelettronica e Microsistemi, Unità di Bologna, 40129 Bologna, Italy
| | - Marco Evangelisti
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain.
| | - Corina Rodríguez-Esteban
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain.
| | - Euan K Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, UK
| | - José M Seco
- Departamento de Química Aplicada, Facultad de Química, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), 20018 Donostia, Spain.
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain.
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8
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Richa, Kumar A, Verma I, Gautam M, Erande RD, Kłak J, Choquesillo-Lazarte D, Mota AJ, Rajput A, Arora H. Structural and Magnetic Characterization of Mixed-valence vanadium (IV/V) complex with {(VO)2(μ‒O)}3+ core: Theoretical and Experimental Insights. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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9
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Reiné P, Ortuño AM, Resa S, Álvarez de Cienfuegos L, Ribagorda M, Mota AJ, Abbate S, Longhi G, Miguel D, Cuerva JM. Enantiopure Double
ortho
‐Oligophenylethynylene‐Based Helical Structures with Circularly Polarized Luminescence Activity. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100160] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Pablo Reiné
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - Ana M. Ortuño
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - Sandra Resa
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - María Ribagorda
- Organic Chemistry Department Department of Organic Chemistry Universidad Autonoma de Madrid C/Francisco Tomás y Valiente n° 7 Cantoblanco 28049 Madrid Spain
| | - Antonio J. Mota
- Department of Inorganic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
| | - Sergio Abbate
- Department of Molecular and Translational Medicine Instituto Nazionale di Ottica – CNR Brescia Research Unit Università di Brescia Via Branze 45 25123 Brescia Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine Instituto Nazionale di Ottica – CNR Brescia Research Unit Università di Brescia Via Branze 45 25123 Brescia Italy
| | - Delia Miguel
- Physical Chemistry Department Unidad de Excelencia de Química University of Granada Faculty of Pharmacy, C. U. Cartuja 18071 Granada Spain
| | - Juan M. Cuerva
- Department of Organic Chemistry Unidad de Excelencia de Química University of Granada Faculty of Science, C. U. Fuentenueva 18071 Granada Spain
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10
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Azpeitia S, Mendicute‐Fierro C, Huertos MA, Rodríguez‐Diéguez A, Seco JM, Mota AJ, Garralda MA. Experimental and DFT studies on Hexacoordinated acyl(alkyl)and Pentacooordinated Hydroxyalkyl(phosphinite)erhodium(III). Catalytic Hydrolysis of Ammonia Borane. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202001028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Susan Azpeitia
- Facultad de Química de San Sebastián Universidad del País Vasco (UPV/EHU) Apdo. 1072 20080 San Sebastián Spain
| | - Claudio Mendicute‐Fierro
- Facultad de Química de San Sebastián Universidad del País Vasco (UPV/EHU) Apdo. 1072 20080 San Sebastián Spain
| | - Miguel A. Huertos
- Facultad de Química de San Sebastián Universidad del País Vasco (UPV/EHU) Apdo. 1072 20080 San Sebastián Spain
- Ikerbasque Basque Foundation for Science 48011 Bilbao Spain
| | | | - José M. Seco
- Facultad de Química de San Sebastián Universidad del País Vasco (UPV/EHU) Apdo. 1072 20080 San Sebastián Spain
| | - Antonio J. Mota
- Departamento de Química Inorgánica Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - María A. Garralda
- Facultad de Química de San Sebastián Universidad del País Vasco (UPV/EHU) Apdo. 1072 20080 San Sebastián Spain
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Agarwal P, Kumar A, Richa, Verma I, Erande RD, Kłak J, Mota AJ, Arora H, Rajput A. The reversible inter-conversion of copper( ii) dimers bearing phenolate-based ligands in their monomers: theoretical and experimental viewpoints. NEW J CHEM 2021. [DOI: 10.1039/d0nj00484g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conversion of the studied dimers into their monomers by an acid and the regeneration of the dimeric core from the monomer by a base is rationalized.
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Affiliation(s)
- Pratibha Agarwal
- School of Engineering and Sciences
- G. D. Goenka University
- Gurugram
- India
| | - Akhilesh Kumar
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
- Department of Chemistry
| | - Richa
- School of Engineering and Sciences
- G. D. Goenka University
- Gurugram
- India
| | - Indresh Verma
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Rohan D. Erande
- Department of Chemistry
- Indian Institute of Technology Jodhpur
- Jodhpur 342037
- India
| | - Julia Kłak
- Faculty of Chemistry
- University of Wroclaw
- Wroclaw 50-383
- Poland
| | - Antonio J. Mota
- Department of Inorganic Chemistry
- Faculty of Science
- University of Granada
- Granada
- Spain
| | - Himanshu Arora
- School of Engineering and Sciences
- G. D. Goenka University
- Gurugram
- India
| | - Amit Rajput
- School of Engineering and Sciences
- G. D. Goenka University
- Gurugram
- India
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12
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Richa, Rathnam M, Kumar A, Verma I, Kłak J, Cano J, Mota AJ, Rajput A, Arora H. Discrete unusual mixed-bridged trinuclear Co III2Co II and pentanuclear Ni II coordination complexes supported by a phenolate-based ligand: theoretical and experimental magneto-structural study. NEW J CHEM 2021. [DOI: 10.1039/d1nj00228g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a combined computational and experimental magnetostructural correlation in trinuclear mixed valence cobalt and pentanuclear nickel complexes.
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Affiliation(s)
- Richa
- School of Engineering and Sciences
- G.D. Goenka University
- Gurugram
- India
| | - Muni Rathnam
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur 741 246
- India
| | - Akhilesh Kumar
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
- Department of Chemistry
| | - Indresh Verma
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Julia Kłak
- Faculty of Chemistry
- University of Wroclaw
- Wroclaw 50-383
- Poland
| | - Joan Cano
- Department of Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Quimica de la Universitat de València, C/Catedrático Jose Beltrán 2
- 46980 Paterna
- Spain
| | - Antonio J. Mota
- Department of Inorganic Chemistry
- Faculty of Science
- University of Granada
- Granada
- Spain
| | - Amit Rajput
- School of Engineering and Sciences
- G.D. Goenka University
- Gurugram
- India
| | - Himanshu Arora
- School of Engineering and Sciences
- G.D. Goenka University
- Gurugram
- India
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13
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Ortuño AM, Reiné P, Resa S, Álvarez de Cienfuegos L, Blanco V, Paredes JM, Mota AJ, Mazzeo G, Abbate S, Ugalde JM, Mujica V, Longhi G, Miguel D, Cuerva JM. Extended enantiopure ortho-phenylene ethylene ( o-OPE)-based helical systems as scaffolds for supramolecular architectures: a study of chiroptical response and its connection to the CISS effect. Org Chem Front 2021. [DOI: 10.1039/d1qo00822f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Versatile enantiopure helical systems are described and are of interest owing to their intense chiroptical responses, their attractive architecture for metallosupramolecular chemistry and CISS effect.
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Affiliation(s)
- Ana M. Ortuño
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Pablo Reiné
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Sandra Resa
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | - Victor Blanco
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
| | | | - Antonio J. Mota
- Department of Inorganic Chemistry, Faculty of Science, UGR-UEQ
| | - Giuseppe Mazzeo
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Jesus M. Ugalde
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
| | - Vladimiro Mujica
- Kimika Fakultatea, Euskal Herriko Unibertsitatea and Donostia International Physics Center (DIPC), P. K. 1072, 20080 Donostia, Euskadi, Spain
- Arizona State University, School of Molecular Sciences, Tempe, AZ 85287, USA
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy
- Istituto Nazionale di Ottica – CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Delia Miguel
- Department of Physical Chemistry, Faculty of Pharmacy, UGR-UEQ
| | - Juan Manuel Cuerva
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain
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14
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García-Valdivia AA, Romero FJ, Cepeda J, Morales DP, Casati N, Mota AJ, Zotti LA, Palacios JJ, Choquesillo-Lazarte D, F Salmerón J, Rivadeneyra A, Rodríguez-Diéguez A. Rational design of an unusual 2D-MOF based on Cu(i) and 4-hydroxypyrimidine-5-carbonitrile as linker with conductive capabilities: a theoretical approach based on high-pressure XRD. Chem Commun (Camb) 2020; 56:9473-9476. [PMID: 32812539 DOI: 10.1039/d0cc03564e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we present, for the first time, a 2D-MOF based on copper and 4-hydroxypyrimidine-5-carbonitrile as the linker. Each MOF layer is perfectly flat and neutral, as is the case for graphene. High pressure X-ray diffraction measurements reveal that this layered structure can be modulated between 3.01 to 2.78 Å interlayer separation, with an evident piezochromism and varying conductive properties. An analysis of the band structure indicates that this material is conductive along different directions depending on the application of pressure or H doping. These results pave the way for the development of novel layered materials with tunable and efficient properties for pressure-based sensors.
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Affiliation(s)
- Antonio A García-Valdivia
- Departament of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain.
| | - Francisco J Romero
- Pervasive Electronics Advanced Research Laboratory (PEARL), Department Electronics and Computer Technology, University of Granada, 18071, Granada, Spain
| | - Javier Cepeda
- Department of Applied Chemistry, Faculty of Chemistry, University of The Basque Country UPV/EHU, Paseo Manuel Lardizabal 3, 20018, Donostia-San Sebastián, Spain
| | - Diego P Morales
- Pervasive Electronics Advanced Research Laboratory (PEARL), Department Electronics and Computer Technology, University of Granada, 18071, Granada, Spain
| | - Nicola Casati
- Laboratory for Synchrotron Radiation - Condensed Matter, Paul Scherrer Institute, Forschungstrasse 111, 5232 Villigen, Switzerland
| | - Antonio J Mota
- Departament of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain.
| | - Linda A Zotti
- Departamento de Física Aplicada I, Escuela Politécnica Superior, Universidad de Sevilla, Seville, E-41011, Spain.
| | - Juan J Palacios
- Departamento de Física de la Materia Condensada, Condensed Matter Physics Center (IFIMAC), and Instituto Nicolás Cabrera (INC), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Duane Choquesillo-Lazarte
- Crystallographic Studies Laboratory, IACT (CSIC-UGR), Avda. de las Palmeras 4, 18100, Armilla, Granada, Spain
| | - José F Salmerón
- Pervasive Electronics Advanced Research Laboratory (PEARL), Department Electronics and Computer Technology, University of Granada, 18071, Granada, Spain
| | - Almudena Rivadeneyra
- Pervasive Electronics Advanced Research Laboratory (PEARL), Department Electronics and Computer Technology, University of Granada, 18071, Granada, Spain
| | - Antonio Rodríguez-Diéguez
- Departament of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain.
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15
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Fernández-Perales M, Sánchez-Polo M, Rozalen M, López-Ramón MV, Mota AJ, Rivera-Utrilla J. Degradation of the diuretic hydrochlorothiazide by UV/Solar radiation assisted oxidation processes. J Environ Manage 2020; 257:109973. [PMID: 31868639 DOI: 10.1016/j.jenvman.2019.109973] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/20/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
The objective of this study was to analyse the effectiveness of advanced oxidation processes (AOPs) with Solar and UV radiation (UV/H2O2, UV/K2S2O8) for the degradation of hydrochlorothiazide (HCTZ), a widely used diuretic drug, in aqueous solution focusing on the influence of four experimental parameters: initial concentration of HCTZ, solution pH, nature of the water matrix, and initial concentration of radicals. The obtained results showed that using both kinds of direct photolysis (UV and Solar), the percentage of degraded HCTZ was low, but there was a decrease in the degradation rate favored by the increase of the initial concentration of this pollutant. In addition, the degradation rates were higher at acid pHs. With regard to the nature of water, the degradation rate varied in the order: ultrapure > superficial > tap water. This is due to the presence of organic and inorganic matter (bicarbonates, nitrates, and chlorides) in surface and tap water, that react with the radicals generated, which reduces the availability of radical species, generating competitive kinetics. The presence of radical-promoter species increased the degradation rate of the pollutant, reaching a degradation of 100% of HCTZ after 20 min of treatment. The results obtained point out that the degradation rate was higher in the presence of HO radicals. This behavior was attributed to the higher oxidation power of HO versus radicals. The determination of the degradation by-products led to structures very similar to the parent compound. For example, the corresponding hydroxylated dechlorinated derivative of HCTZ was found in all the systems used. The cytotoxicity test showed that these byproducts have a lower toxicity than the original product. Finally, the economic viability study confirmed that the UV/K2S2O8 system has the lowest cost.
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Affiliation(s)
- M Fernández-Perales
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - M Sánchez-Polo
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain.
| | - M Rozalen
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - M V López-Ramón
- Department of Inorganic and Organic Chemistry, Faculty of Experimental Science, University of Jaén, 23071, Jaén, Spain.
| | - A J Mota
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
| | - J Rivera-Utrilla
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain
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16
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Resa S, Reiné P, Álvarez de Cienfuegos L, Guisán-Ceinos S, Ribagorda M, Longhi G, Mazzeo G, Abbate S, Mota AJ, Miguel D, Cuerva JM. Optically active Ag(i): o-OPE helicates using a single homochiral sulfoxide as chiral inducer. Org Biomol Chem 2019; 17:8425-8434. [PMID: 31469142 DOI: 10.1039/c9ob01573f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we describe the ability of a simple enantiopure sulfoxide group to promote folding of oligo ortho-phenylene ethynylenes (o-OPEs) with one helical sense. A family of foldamers with up to seven triple bonds was synthesized and fully characterized. Moreover, changes in structure and chiroptical properties caused by Ag(i) coordination have been studied by NMR, UV, VCD and ECD measurements. Quantum mechanical DFT calculations support experimental results.
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Affiliation(s)
- Sandra Resa
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Pablo Reiné
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
| | - Santiago Guisán-Ceinos
- Department of Organic Chemistry, C.U. Cantoblanco, Universidad Autónoma de Madrid, Spain
| | - María Ribagorda
- Department of Organic Chemistry, C.U. Cantoblanco, Universidad Autónoma de Madrid, Spain
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Universitá di Brescia, Viale Europa 11, Brescia, Italy
| | - Antonio J Mota
- Department of Inorganic Chemistry, UEQ, University of Granada, C.U. Fuentenueva, Granada, Spain
| | - Delia Miguel
- Department of Physical Chemistry, UEQ, University of Granada, C.U. Cartuja, Granada, Spain.
| | - Juan M Cuerva
- Department of Organic Chemistry, Unidad de Excelencia de Química (UEQ), University of Granada, C.U. Fuentenueva, Granada, Spain.
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17
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Reine P, Campaña AG, Alvarez de Cienfuegos L, Blanco V, Abbate S, Mota AJ, Longhi G, Miguel D, Cuerva JM. Chiral double stapled o-OPEs with intense circularly polarized luminescence. Chem Commun (Camb) 2019; 55:10685-10688. [PMID: 31432053 DOI: 10.1039/c9cc04885e] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Intrinsically chiral double stapled ortho-oligo phenylene ethynylenes (o-OPEs) 1 show glum values up to 5.5 × 10-2, the second highest value ever observed for a simple organic molecule (SOM). DFT calculations of molecular spectra and properties encompassing electric and magnetic dipole transition moments account for these observations.
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Affiliation(s)
- Pablo Reine
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
| | - Araceli G Campaña
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
| | - Luis Alvarez de Cienfuegos
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
| | - Victor Blanco
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
| | - Sergio Abbate
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy. and Istituto Nazionale di Ottica - CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Antonio J Mota
- Department of Inorganic Chemistry, Faculty of Science, UGR-UEQ, Granada, Spain
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine, Università di Brescia, Brescia, Italy. and Istituto Nazionale di Ottica - CNR, Brescia Research Unit, via Branze 45, 25123 Brescia, Italy
| | - Delia Miguel
- Department of Physical Chemistry, Faculty of Pharmacy, UGR-UEQ, Granada, Spain.
| | - Juan M Cuerva
- Department of Organic Chemistry, Faculty of Science, Universidad de Granada (UGR), Unidad de Excelencia de Química (UEQ), E-18071 Granada, Spain.
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18
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Meseguer C, Palacios MA, Mota AJ, Drahoš B, Brechin EK, Navarrete R, Moreno JM, Colacio E. Effect of π-aromatic spacers on the magnetic properties and slow relaxation of double stranded metallacyclophanes with a LnIII–MII–MII–LnIII (LnIII = GdIII, DyIII, YIII; MII = NiII, CoII) linear topology. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.05.054] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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19
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López-Ramón MV, Rivera-Utrilla J, Sánchez-Polo M, Polo AMS, Mota AJ, Orellana-García F, Álvarez MA. Photocatalytic oxidation of diuron using nickel organic xerogel under simulated solar irradiation. Sci Total Environ 2019; 650:1207-1215. [PMID: 30308808 DOI: 10.1016/j.scitotenv.2018.09.113] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 09/08/2018] [Accepted: 09/08/2018] [Indexed: 06/08/2023]
Abstract
In this study, a nickel organic xerogel (X-Ni) was used as semiconductor photocatalyst for the degradation of the herbicide diuron (DRN) in aqueous solution. The main objective of this work was to analyze and compare the effectiveness of solar irradiation to remove DRN from water both by direct photolysis and photocatalytic degradation. We examined the influence of the initial concentration of the herbicide, the solution pH, the presence of different ions in the medium, the chemical composition of the water, and the presence of a photocatalyst, after 240 min of irradiation. Direct photolysis achieved a low percentage of DRN degradation but was favored: i) by a reduction in the initial concentration of the herbicide (from 35.6% to 79.0% for 0.150 × 10-3 mol/L and 0.021 × 10-3 mol/L of DRN, respectively) and ii) at solution pHs at which diuron is positively charged (78.6% for pH 2 and 50.4% for pH 7), as suggested by DFT calculations carried out for DRN and its protonated form (DRN-H+). The corresponding mono-demethylated DRN derivative, 1-(3,4-dichlorophenyl)-3-methylurea (DCPU), was identified as a DRN degradation byproduct. In addition, the presence of certain anions in the medium significantly affected the overall degradation process by direct photolysis, due to the additional generation of HO radicals. We highlight that the presence of X-Ni considerably improved the photodegradation process under solar irradiation. The photocatalytic degradation rate constant was directly proportional to the xerogel concentration, because an increase in catalyst dose produced an increase in surface active sites for the photodegradation of DRN, enhancing the overall efficiency of the process. Thus, when 4167 mg/g of X-Ni was added, the DRN removal rate was 3-fold higher and both percentage of degradation and mineralization increased 88.5% with respect to the results obtained by direct photolysis.
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Affiliation(s)
- M V López-Ramón
- Department of Inorganic and Organic Chemistry, Faculty of Experimental Science, University of Jaén, 23071 Jaén, Spain.
| | - J Rivera-Utrilla
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - M Sánchez-Polo
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - A M S Polo
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - Antonio J Mota
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - F Orellana-García
- Department of Inorganic and Organic Chemistry, Faculty of Experimental Science, University of Jaén, 23071 Jaén, Spain
| | - M A Álvarez
- Department of Inorganic and Organic Chemistry, Faculty of Experimental Science, University of Jaén, 23071 Jaén, Spain
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20
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Nebbali K, Mekuimemba CD, Charles C, Yefsah S, Chastanet G, Mota AJ, Colacio E, Triki S. One-Dimensional Thiocyanato-Bridged Fe(II) Spin Crossover Cooperative Polymer With Unusual FeN 5S Coordination Sphere. Inorg Chem 2018; 57:12338-12346. [PMID: 30207469 DOI: 10.1021/acs.inorgchem.8b02061] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present here a novel example of spin crossover phenomenon on a Fe(II) one-dimensional chain with unusual N5S coordination sphere. The [{Fe(tpc-OMe)(NCS)(μ-NCS)} n] (1) compound was prepared using the tridentate tpc-OMe ligand (tpc-OMe = tris(2-pyridyl)methoxymethane), FeCl2·4H2O, and the KSCN salt. Crystallographic investigations revealed that the Fe(II) ions are connected by a single bridging NCS- ligand (μ-κN:κS-SCN coordination mode) to afford a zigzag neutral chain running along the [010] direction, in which the thiocyanato bridging groups adopt a cis head-to-tail configuration. The (N5S) metal environment arises from one thiocyanato-κS and two thiocyanato-κN ligands and from three pyridine of the fac-tpc-OMe tripodal ligand. This compound presents a unique extension of Fe(II) binuclear complexes into linear chains built on similar tripodal ligands and bridging thiocyanate anions. Compound 1 shows a spin crossover (SCO) behavior which has been evidenced by magnetic, calorimetric, and structural investigations, revealing a sharp cooperative spin transition with a transition temperature of ca. 199 K. Temperature scan rate studies revealed a very narrow hysteresis loop (∼1 K wide). Photoswitching of this compound was also performed, evidencing a very fast relaxation process at low temperature. Among other factors, the linearity of the N-bound terminal thiocyanato ligand appears as the main structural characteristic at the origin of the presence of the SCO transition in compound 1 and in the two others Fe(II) previous systems involving thiocyanato-bridges and tripodal tris(2-pyridyl)methane ligands.
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Affiliation(s)
- Kahina Nebbali
- UMR-CNRS 6521 , University de Brest (UBO) , 6 Av. V. Le Gorgeu , C.S. 93837, F-29238, Brest CEDEX 3 , France.,Faculté des Sciences , Université Mouloud Mammeri , Tizi-Ouzou 15000 , Algérie
| | - Cle Donacier Mekuimemba
- UMR-CNRS 6521 , University de Brest (UBO) , 6 Av. V. Le Gorgeu , C.S. 93837, F-29238, Brest CEDEX 3 , France
| | - Catherine Charles
- UMR-CNRS 6521 , University de Brest (UBO) , 6 Av. V. Le Gorgeu , C.S. 93837, F-29238, Brest CEDEX 3 , France
| | - Said Yefsah
- Faculté des Sciences , Université Mouloud Mammeri , Tizi-Ouzou 15000 , Algérie
| | - Guillaume Chastanet
- Institut de Chimie de la Matière Condensée de Bordeaux , Universite de Bordeaux́ , 87 Av. Doc. A. Schweitzer , F-33608 Pessac , France
| | - Antonio J Mota
- Departamento de Química Inorgánica, Facultad de Ciencias , Universidad de Granada , Av. Fuentenueva S/N , 18071 Granada , Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias , Universidad de Granada , Av. Fuentenueva S/N , 18071 Granada , Spain
| | - Smail Triki
- UMR-CNRS 6521 , University de Brest (UBO) , 6 Av. V. Le Gorgeu , C.S. 93837, F-29238, Brest CEDEX 3 , France
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21
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Silva-Moraes MO, Garcia-Basabe Y, de Souza RFB, Mota AJ, Passos RR, Galante D, Fonseca Filho HD, Romaguera-Barcelay Y, Rocco MLM, Brito WR. Geometry-dependent DNA-TiO 2 immobilization mechanism: A spectroscopic approach. Spectrochim Acta A Mol Biomol Spectrosc 2018; 199:349-355. [PMID: 29635179 DOI: 10.1016/j.saa.2018.03.081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 03/28/2018] [Accepted: 03/30/2018] [Indexed: 06/08/2023]
Abstract
DNA nucleotides are used as a molecular recognition system on electrodes modified to be applied in the detection of various diseases, but immobilization mechanisms, as well as, charge transfers are not satisfactorily described in the literature. An electrochemical and spectroscopic study was carried out to characterize the molecular groups involved in the direct immobilization of DNA structures on the surface of nanostructured TiO2 with the aim of evaluating the influence of the geometrical aspects. X-ray photoelectron spectroscopy at O1s and P2p core levels indicate that immobilization of DNA samples occurs through covalent (POTi) bonds. X-ray absorption spectra at the Ti2p edge reinforce this conclusion. A new species at 138.5eV was reported from P2p XPS spectra analysis which plays an important role in DNA-TiO2 immobilization. The POTi/OTi ratio showed that quantitatively the DNA immobilization mechanism is dependent on their geometry, becoming more efficient for plasmid ds-DNA structures than for PCR ds-DNA structures. The analysis of photoabsorption spectra at C1s edge revealed that the molecular groups that participate in the C1s→LUMO electronic transitions have different pathways in the charge transfer processes at the DNA-TiO2 interface. Our results may contribute to additional studies of immobilization mechanisms understanding the influence of the geometry of different DNA molecules on nanostructured semiconductor and possible impact to the charge transfer processes with application in biosensors or aptamers.
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Affiliation(s)
- M O Silva-Moraes
- Department of Chemistry, Federal University of Amazonas, Manaus, Amazonas 69067-005, Brazil
| | - Y Garcia-Basabe
- Institute of Science of Life and Nature - ILACVN, Federal University of Latin-American Integration, Foz do Iguaçu 85866-000, PR, Brazil
| | - R F B de Souza
- Department of Chemistry, Federal University of Amazonas, Manaus, Amazonas 69067-005, Brazil
| | - A J Mota
- Faculty of Agricultural Sciences, Federal University of Amazonas, Manaus, Amazonas 69067-005, Brazil
| | - R R Passos
- Department of Chemistry, Federal University of Amazonas, Manaus, Amazonas 69067-005, Brazil
| | - D Galante
- Brazilian Synchrotron Light Laboratory LNLS/CNPEM, Campinas, São Paulo 13083-970, Brazil
| | - H D Fonseca Filho
- Department of Physics, Federal University of Amazonas, Manaus, Amazonas 69067-005, Brazil
| | - Y Romaguera-Barcelay
- Department of Physics, Federal University of Amazonas, Manaus, Amazonas 69067-005, Brazil
| | - M L M Rocco
- Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
| | - W R Brito
- Department of Chemistry, Federal University of Amazonas, Manaus, Amazonas 69067-005, Brazil.
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22
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San Nacianceno V, Ibarlucea L, Mendicute-Fierro C, Rodríguez-Diéguez A, Seco JM, Mota AJ, Garralda MA. Secondary Oxide Phosphines to Promote Tandem Acyl-Alkyl Coupling/Hydrogen Transfer to Afford (Hydroxyalkyl)rhodium Complexes. Theoretical and Experimental Studies. Inorg Chem 2018; 57:5307-5319. [PMID: 29659263 DOI: 10.1021/acs.inorgchem.8b00320] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Acyl(σ-norbornenyl)rhodium(III) dimer [Rh(μ-Cl)(C9H6NCO)(C7H9)L]2 (1) (C7H9 = σ-norbornenyl; L = 4-picoline, isoquinoline) reacts with diphenylphosphine oxide (SPO) to undergo a one-pot reaction involving (i) cleavage of the chloride bridges and coordination of the phosphine, (ii) C-C bond coupling between acyl and norbornenyl in a 18e species, and (iii) ligand-assisted outer-sphere O(P)-to-O(C) hydrogen transfer, to afford mononuclear 16e species [RhCl{(C9H6NC(O)C7H9)(Ph2PO)H}(L)] (2) containing a quinolinyl-(norbornenylhydroxyalkyl) fragment hydrogen-bonded to a κ1- P-phosphinite ligand. Pentacoordinated 2, which adopt a distorted trigonal bipyramidal structure, are kinetic reaction products that transform into the thermodynamic favored isomers 3. Structures 3 contain an unusual weak η1-C anagostic interaction involving the rhodium atom and one carbon atom of the olefinic C-H bond of the norbornenyl substituent in the chelating quinolinyl-hydroxyalkyl moiety. Their structure can be described as pseudoctahedral, through a 5 + 1 coordination, with the anagostic interaction in a trans disposition with respect to the phosphorus atom of the phosphinite ligand. Complexes were characterized in solution by NMR spectroscopy and electrospray ionization mass spectrometry. Complex [RhCl{(C9H6NC(O)C7H9)(Ph2PO)H}(4-picoline)] (3a) was also identified by X-ray diffraction. Density functional theory calculations confirm the proposed structures by a plausible set of mechanisms that accounts for the 1 (monomer) → 2 → 3 transformation. Lowest-energy pathways involve reductive elimination of quinolinylnorbornenylketone, still coordinated in the rhodium(I) species thus formed, followed by O-to-O hydrogen transfer from κ1- P-SPO to the sp3 hybridized carbonyl group (formal alkoxide) avoiding the otherwise expected classical release of ketone. Theoretical 13C NMR studies also confirm the experimental spectral data for the considered structures.
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Affiliation(s)
- Virginia San Nacianceno
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
| | - Lourdes Ibarlucea
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
| | - Claudio Mendicute-Fierro
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
| | | | - José M Seco
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
| | - Antonio J Mota
- Facultad de Ciencias , Universidad de Granada , Avda. Fuentenueva s/n , 18002 Granada , Spain
| | - María A Garralda
- Facultad de Química de San Sebastián , Universidad del País Vasco (UPV-EHU) , Apdo. 1072 , 20080 San Sebastián , Spain
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23
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Hänninen MM, Mota AJ, Sillanpää R, Dey S, Velmurugan G, Rajaraman G, Colacio E. Magneto-Structural Properties and Theoretical Studies of a Family of Simple Heterodinuclear Phenoxide/Alkoxide Bridged MnIIILnIII Complexes: On the Nature of the Magnetic Exchange and Magnetic Anisotropy. Inorg Chem 2018; 57:3683-3698. [DOI: 10.1021/acs.inorgchem.7b02917] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mikko M. Hänninen
- Department of Chemistry, University of Jyväskylä, P.O. Box
35, FIN-40014 Jyväskylä, Finland
| | - Antonio J. Mota
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. de Fuentenueva s/n, 18071 Granada, Spain
| | - Reijo Sillanpää
- Department of Chemistry, University of Jyväskylä, P.O. Box
35, FIN-40014 Jyväskylä, Finland
| | - Sourav Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Gunasekaran Velmurugan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. de Fuentenueva s/n, 18071 Granada, Spain
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24
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Mekuimemba CD, Conan F, Mota AJ, Palacios MA, Colacio E, Triki S. On the Magnetic Coupling and Spin Crossover Behavior in Complexes Containing the Head-to-Tail [FeII2(μ-SCN)2] Bridging Unit: A Magnetostructural Experimental and Theoretical Study. Inorg Chem 2018; 57:2184-2192. [PMID: 29420016 DOI: 10.1021/acs.inorgchem.7b03082] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cle Donacier Mekuimemba
- UMR-CNRS 6521, Université de Brest (UBO), 6 Avenue Victor Le Gorgeu, CS
93837, 29238 Brest Cedex 3, France
| | - Françoise Conan
- UMR-CNRS 6521, Université de Brest (UBO), 6 Avenue Victor Le Gorgeu, CS
93837, 29238 Brest Cedex 3, France
| | - Antonio J. Mota
- Departamento de Química Inorgánica,
Facultad de Ciencias, Universidad de Granada, Avenida de Fuente Nueva S/N, 18071 Granada, Spain
| | - Maria A. Palacios
- Departamento de Química Inorgánica,
Facultad de Ciencias, Universidad de Granada, Avenida de Fuente Nueva S/N, 18071 Granada, Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica,
Facultad de Ciencias, Universidad de Granada, Avenida de Fuente Nueva S/N, 18071 Granada, Spain
| | - Smail Triki
- UMR-CNRS 6521, Université de Brest (UBO), 6 Avenue Victor Le Gorgeu, CS
93837, 29238 Brest Cedex 3, France
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25
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Resa S, Miguel D, Guisán-Ceinos S, Mazzeo G, Choquesillo-Lazarte D, Abbate S, Crovetto L, Cárdenas DJ, Carreño MC, Ribagorda M, Longhi G, Mota AJ, Álvarez de Cienfuegos L, Cuerva JM. Sulfoxide-Induced Homochiral Folding of ortho
-Phenylene Ethynylenes (o
-OPEs) by Silver(I) Templating: Structure and Chiroptical Properties. Chemistry 2018; 24:2653-2662. [DOI: 10.1002/chem.201704897] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Indexed: 12/29/2022]
Affiliation(s)
- Sandra Resa
- Department of Organic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
| | - Delia Miguel
- Department of Physical Chemistry; University of Granada, UGR, Cartuja Campus; 18071 Granada Spain
| | - Santiago Guisán-Ceinos
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - Giuseppe Mazzeo
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos; Instituto Andaluz de Ciencias de la Tierra, CSIC-UGR; Armilla, Granada Spain
| | - Sergio Abbate
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Luis Crovetto
- Department of Physical Chemistry; University of Granada, UGR, Cartuja Campus; 18071 Granada Spain
| | - Diego J. Cárdenas
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - M. Carmen Carreño
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - María Ribagorda
- Department of Organic Chemistry; Universidad Autónoma de Madrid, Cantoblanco; 28049 Madrid Spain
| | - Giovanna Longhi
- Dipartimento di Medicina e Traslazionale; Università di Brescia; Viale Europa 11 25123 Brescia Italy
| | - Antonio J. Mota
- Department of Inorganic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
| | | | - Juan M. Cuerva
- Department of Organic Chemistry; University of Granada, UGR; C. U. Fuentenueva 18071 Granada Spain
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26
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Costes JP, Duhayon C, Vendier L, Mota AJ. Reactions of a series of ZnL, CuL and NiL Schiff base and non-Schiff base complexes with MCl2 salts (M = Cu, Ni, Mn): syntheses, structures, magnetic properties and DFT calculations. NEW J CHEM 2018. [DOI: 10.1039/c7nj04347c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT calculations demonstrate that the weak antiferromagnetic interaction in the highly non-symmetric diphenoxo Cu–Cu bridge results from two antagonistic bridging pathways
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Affiliation(s)
- Jean-Pierre Costes
- Laboratoire de Chimie de Coordination du CNRS
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
- UPS
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination du CNRS
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
- UPS
| | - Laure Vendier
- Laboratoire de Chimie de Coordination du CNRS
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
- UPS
| | - Antonio J. Mota
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada. Avda. Fuentenueva s/n
- 18002-Granada
- Spain
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27
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Mota AJ, Neuhold J, Drescher M, Lemouzy S, González L, Maulide N. Intramolecular hydrogen bonding in conformationally semi-rigid α-acylmethane derivatives: a theoretical NMR study. Org Biomol Chem 2017; 15:7572-7579. [PMID: 28858370 DOI: 10.1039/c7ob01834g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Conformational mobility is a core property of organic compounds, and conformational analysis has become a pervasive tool for synthetic design. In this work, we present experimental and computational (employing Density Functional Theory) evidence for unusual intramolecular hydrogen bonding interactions in a series of α-acylmethane derivatives, as well as a discussion of the consequences thereof for their NMR spectroscopic properties.
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Affiliation(s)
- Antonio J Mota
- Department of Inorganic Chemistry, Faculty of Sciences, Avda. Fuentenueva s/n, 18002 Granada, Spain.
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28
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Palacios MA, Morlieras J, Herrera JM, Mota AJ, Brechin EK, Triki S, Colacio E. Synthetic ability of dinuclear mesocates containing 1,3-bis(diazinecarboxamide)benzene bridging ligands to form complexes of increased nuclearity. Crystal structures, magnetic properties and theoretical studies. Dalton Trans 2017; 46:10469-10483. [PMID: 28752869 DOI: 10.1039/c7dt02288c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Triple stranded Ni-metallacyclic complexes Na2.5[Ni2(bpcb)3]·0.5OH·18.5H2O (1) and Na2[Ni2(bpzcb)3]·16H2O (2), and double stranded Cu-metallacyclic complexes [Cu2(bpcb)2(H2O)2]·8H2O (3) and [Cu2(bpzcb)2(H2O)2]·4H2O (4) have been assembled from the tailored bisbidentate bridging ligands, 1,3-bis(pyrimidine-2-carboxamide)benzene (H2bpcb) and 1,3-bis(pyrazine-2-carboxamide)benzene (H2bpzcb), and the corresponding nitrate salts of the metal ions. Following the "complex as ligand" strategy, 1 can be assembled with either Ni2+, Co2+ ions or the [Mn(acen)Cl] complex to afford unique, neutral, bent trinuclear molecules [MIINi(bpcb)3]·xH2O (5 and 6) and the 2D honeycomb-like complex (PPh4){[Ni2(bpcb)3]2[Mn(acen)]3} (7), respectively. In these cases, the Ni2 units are linked to the corresponding metal ions through amidate oxygen atoms and the outward nitrogen atom of one of the pyrimidine rings of the bcpb ligand. The assembly of 2 with Ln3+ ions (Ln3+ = Tb, Gd) leads to one dimensional complexes of formula [{[Ni2(bpzcb)3]Tb(H2O)5}(CF3SO3)·THF·5H2O]n (8) and [{[Ni2(bpzcb)3]Ln(H2O)4(NO3)}·2THF·nH2O]n (9 and 10) (Ln3+ = Gd and Tb), where the dinuclear Ni2 units are joined to two Ln3+ ions exclusively through amidate oxygen atoms of two different ligands. The analyses of the magnetic data indicate that 1-4 exhibit intradinuclear ferromagnetic interactions between the metal ions through a spin polarisation mechanism, as supported by DFT calculations. Trinuclear complexes 5 and 6 show predominant antiferromagnetic coupling, which is a result of an antiferromagnetic interaction between one of the Ni2+ ions of the Ni2 unit and the M2+ ion through the pyrimidine bridging fragment that is stronger than the polarised ferromagnetic interaction between the Ni2+ ions through the bpcb ligand in the dinuclear [Ni2(bpcb)3]2- moiety. Complex 7 shows a dominant antiferromagnetic interaction between the Ni2+ and Mn2+, whereas the Ni2Ln (Ln3+ = Gd, Tb) chain complexes present ferromagnetic interactions inside the Ni2 mesocate unit as well as between the Ni2+ ions of the Ni2 unit and the Ln3+ ions. The magnetic exchange interactions in these new materials have been experimentally analysed and supported by theoretical DFT studies.
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Affiliation(s)
- Maria A Palacios
- Departamento de Química Inorgánica, Universidad de Granada, Av. Fuentenueva S/N, 18071 Granada, Spain.
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29
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Sagar S, Sengupta S, Mota AJ, Chattopadhyay SK, Espinosa Ferao A, Riviere E, Lewis W, Naskar S. Cubane-like tetranuclear Cu(ii) complexes bearing a Cu4O4 core: crystal structure, magnetic properties, DFT calculations and phenoxazinone synthase like activity. Dalton Trans 2017; 46:1249-1259. [DOI: 10.1039/c6dt03754b] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two tetranuclear copper complexes with a Cu4O4 cubane core exhibiting phenoxazinone synthase like activity are reported.
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Affiliation(s)
- Shipra Sagar
- Department of Chemistry
- Birla Institute of Technology
- Ranchi-835215
- India
| | - Swaraj Sengupta
- Department of Chemistry
- Birla Institute of Technology
- Ranchi-835215
- India
- Department of Chemistry
| | - Antonio J. Mota
- Department of Inorganic Chemistry
- Faculty of Sciences
- University of Granada
- 18002 Granada
- Spain
| | - Shyamal K. Chattopadhyay
- Department of Chemistry
- Indian Institute of Engineering Science and Technology-Shibpur
- Howrah-711103
- India
| | | | - Eric Riviere
- Equipe Chimie Inorganique
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Université Paris Sud
- 91400 Orsay
- France
| | - William Lewis
- School of Chemistry
- University of Nottingham
- Nottingham NG7 2RD
- UK
| | - Subhendu Naskar
- Department of Chemistry
- Birla Institute of Technology
- Ranchi-835215
- India
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30
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Parween A, Naskar S, Mota AJ, Espinosa Ferao A, Chattopadhyay SK, Rivière E, Lewis W, Naskar S. C
i
-Symmetry, [2 × 2] grid, square copper complex with the N4,N5-bis(4-fluorophenyl)-1H-imidazole-4,5-dicarboxamide ligand: structure, catecholase activity, magnetic properties and DFT calculations. NEW J CHEM 2017. [DOI: 10.1039/c7nj01667k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
An antiferromagnetically coupled tetranuclear copper complex of a dinucleating bis amide ligand displays catecholase activity.
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Affiliation(s)
- Arfa Parween
- Department of Chemistry
- Birla Institute of Technology
- Ranchi-835215
- India
| | - Sumita Naskar
- Department of Chemistry
- RTC Institute of Technology
- Ranchi – 835219
- India
- Department of Chemistry
| | - Antonio J. Mota
- Department of Inorganic Chemistry
- Faculty of Sciences
- University of Granada
- 18002 Granada
- Spain
| | - Arturo Espinosa Ferao
- Department of Organic Chemistry
- University of Murcia
- Campus de Espinardo
- 30100 Murcia
- Spain
| | | | - Eric Rivière
- Equipe Chimie Inorganique
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- Université Paris Sud
- 91400 Orsay
- France
| | - William Lewis
- School of Chemistry
- University of Nottingham
- Nottingham NG7 2RD
- UK
| | - Subhendu Naskar
- Department of Chemistry
- Birla Institute of Technology
- Ranchi-835215
- India
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31
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Rivera-Utrilla J, Daiem MMA, Sánchez-Polo M, Ocampo-Pérez R, López-Peñalver JJ, Velo-Gala I, Mota AJ. Removal of compounds used as plasticizers and herbicides from water by means of gamma irradiation. Sci Total Environ 2016; 569-570:518-526. [PMID: 27366982 DOI: 10.1016/j.scitotenv.2016.06.114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/07/2016] [Accepted: 06/15/2016] [Indexed: 06/06/2023]
Abstract
Gamma radiation has been used to induce the degradation of compounds used as plasticizers and herbicides such as phthalic acid (PA), bisphenol A (BPA), diphenolic acid (DPA), 2,4-dichlorophenoxy-acetic acid (2,4-D), and 4-chloro-2-methylphenoxyacetic acid (MCPA) in aqueous solution, determining the dose constants, removal percentages, and radiation-chemical yields. The reaction rate constants of hydroxyl radical (HO), hydrated electron (eaq(-)) and hydrogen atom (H) with these pollutants were also obtained by means of competition kinetics, using 3-aminopyridine and atrazine as reference compounds. The results indicated that the elimination of these pollutants with gamma radiation mainly follows the oxidative pathway through reaction with HO radicals. The degradation by-products from the five pollutants were determined, detecting that the hydroxylation of the corresponding parent compounds was the main chemical process in the degradation of the pollutants. Moreover, a high decrease in the chemical oxygen demand has been observed for all pollutants. As expected, the degradation by-products generated by the irradiation of PA, BPA and DPA showed a lower toxicity than the parent compounds, however, in the case of 2,4-D and MCPA irradiation, interestingly, their by-products were more toxic than the corresponding original compounds.
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Affiliation(s)
- José Rivera-Utrilla
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain.
| | - Mahmoud M Abdel Daiem
- Environmental Engineering Department, Faculty of Engineering, Zagazig University, 44519 Zagazig, Egypt
| | - Manuel Sánchez-Polo
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - Raúl Ocampo-Pérez
- Center of Research and Postgraduate Studies, Faculty of Chemical Science, Autonomous University of San Luis Potosí, Av. Dr. M. Nava No.6, San Luis Potosí SLP 78210, Mexico
| | - Jesús J López-Peñalver
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - Inmaculada Velo-Gala
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
| | - Antonio J Mota
- Inorganic Chemistry Department, Faculty of Science, University of Granada, 18071 Granada, Spain
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32
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Morcillo SP, Miguel D, Álvarez de Cienfuegos L, Justicia J, Abbate S, Castiglioni E, Bour C, Ribagorda M, Cárdenas DJ, Paredes JM, Crovetto L, Choquesillo-Lazarte D, Mota AJ, Carreño MC, Longhi G, Cuerva JM. Stapled helical o-OPE foldamers as new circularly polarized luminescence emitters based on carbophilic interactions with Ag(i)-sensitivity. Chem Sci 2016; 7:5663-5670. [PMID: 30034704 PMCID: PMC6022022 DOI: 10.1039/c6sc01808d] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 05/16/2016] [Indexed: 11/21/2022] Open
Abstract
ortho-Oligo(phenylene)ethynylenes (o-OPEs) stapled with enantiopure 2,3-dihydroxybutane diethers have highly intense circular dichroism (CD) spectra and excellent circular polarized luminescence (CPL) responses (glum values up to 1.1 × 10-2), which are consistent with homochiral helically folded structures. In the presence of Ag(i), a change in the CPL emission is observed, representing the first example of CPL active small organic molecular emitters, which can be modulated by carbophilic interactions in a reversible manner.
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Affiliation(s)
- Sara P Morcillo
- Institut de Chimie Moléculaire et des Matériaux d'Orsay , CNRS UMR 8182 , Univ. Paris-Sud Université Paris-Saclay bâtiment 420 , 91405 Orsay cedex , France
| | - Delia Miguel
- Department of Organic Chemistry , University of Granada (UGR) , C. U. Fuentenueva , 18071 Granada , Spain . ;
| | - Luis Álvarez de Cienfuegos
- Department of Organic Chemistry , University of Granada (UGR) , C. U. Fuentenueva , 18071 Granada , Spain . ;
| | - José Justicia
- Department of Organic Chemistry , University of Granada (UGR) , C. U. Fuentenueva , 18071 Granada , Spain . ;
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy .
| | - Ettore Castiglioni
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy .
| | - Christophe Bour
- Institut de Chimie Moléculaire et des Matériaux d'Orsay , CNRS UMR 8182 , Univ. Paris-Sud Université Paris-Saclay bâtiment 420 , 91405 Orsay cedex , France
| | - María Ribagorda
- Departamento de Química Orgánica , Universidad Autónoma de Madrid , c/Francisco Tomás y Valiente n° 7, Cantoblanco , 28049 Madrid , Spain
| | - Diego J Cárdenas
- Departamento de Química Orgánica , Universidad Autónoma de Madrid , c/Francisco Tomás y Valiente n° 7, Cantoblanco , 28049 Madrid , Spain
| | - José Manuel Paredes
- Department of Physical Chemistry , Faculty of Pharmacy , UGR , Cartuja Campus , 18071 Granada , Spain
| | - Luis Crovetto
- Department of Physical Chemistry , Faculty of Pharmacy , UGR , Cartuja Campus , 18071 Granada , Spain
| | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos , Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR) , 18100 Armilla , Granada , Spain
| | - Antonio J Mota
- Department of Inorganic Chemistry , UGR , C. U. Fuentenueva , 18071 Granada , Spain
| | - M Carmen Carreño
- Departamento de Química Orgánica , Universidad Autónoma de Madrid , c/Francisco Tomás y Valiente n° 7, Cantoblanco , 28049 Madrid , Spain
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale , Università di Brescia , Viale Europa 11 , 25123 Brescia , Italy .
| | - Juan M Cuerva
- Department of Organic Chemistry , University of Granada (UGR) , C. U. Fuentenueva , 18071 Granada , Spain . ;
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33
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Sanmartín-Matalobos J, Fondo M, García-Deibe AM, Amoza M, Bermejo P, Domínguez MR, Mota AJ, Pérez-Lustres JL, Bhowmick S, Das N. Zinc-mediated diastereoselective assembly of a trinuclear circular helicate. RSC Adv 2016. [DOI: 10.1039/c6ra01783e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
We have designed a triptycene-based ditopic ligand H2L, which is able to adopt an adequate topology required for optimal binding to naked Zn2+ leading to a neutral trinuclear circular helicate Zn3L3.
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34
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Miguel D, Márquez IR, Álvarez de Cienfuegos L, Fuentes N, Rodríguez-Bolivar S, Cárdenas DJ, Mota AJ, Gómez-Campos F, Cuerva JM. Two-dimensional carbon-based conductive materials with dynamically controlled asymmetric Dirac cones. Phys Chem Chem Phys 2015; 17:31902-10. [PMID: 26568425 DOI: 10.1039/c5cp04631a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The design of two dimensional graphene-type materials with an anisotropic electron flow direction in the X- and Y-axes opens the door for the development of novel electronic materials with multiple functions in nanoelectronics. In the present work, we have studied the electronic transport properties of a new family of 2D graphene-graphyne hybrids presenting conformationally free phenylethylene subunits. This system ensures two different conductive pathways that are perpendicular to each other: an acene nanoribbon subunit, in the X-axis, with graphene-type conduction, and a free to rotate phenylethylene subunit, in the Y-axis, in which the magnitude of the conduction depends dynamically on the corresponding torsion angle. Our calculations have confirmed that this system presents two different conduction pathways, which are related to the presence of asymmetric Dirac-type cones. Moreover, the Dirac cones can be dynamically modified in the presence of an external gate electrode, which is unprecedented in the literature.
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Affiliation(s)
- Delia Miguel
- Department of Organic Chemistry, Faculty of Science, University of Granada, Granada, Spain.
| | - Irene R Márquez
- Department of Organic Chemistry, Faculty of Science, University of Granada, Granada, Spain.
| | | | - Noelia Fuentes
- Department of Organic Chemistry, Faculty of Science, University of Granada, Granada, Spain.
| | - Salvador Rodríguez-Bolivar
- Department of Electronic and Computer Technology, Faculty of Science, University of Granada, Granada, Spain.
| | - Diego J Cárdenas
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Madrid, Spain
| | - Antonio J Mota
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, Granada, Spain.
| | - Francisco Gómez-Campos
- Department of Electronic and Computer Technology, Faculty of Science, University of Granada, Granada, Spain.
| | - Juan M Cuerva
- Department of Organic Chemistry, Faculty of Science, University of Granada, Granada, Spain.
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35
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Costes JP, Dahan F, Duhayon C, Mota AJ. Can novel dinuclear Ni–Gd complexes give supplementary information on the Ni–Gd magnetic interaction? Polyhedron 2015. [DOI: 10.1016/j.poly.2015.04.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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36
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Oyarzabal I, Ruiz J, Mota AJ, Rodríguez-Diéguez A, Seco JM, Colacio E. An experimental and theoretical magneto-structural study of polynuclear NiII complexes assembled from a versatile bis(salicylaldehyde)diamine polytopic ligand. Dalton Trans 2015; 44:6825-38. [DOI: 10.1039/c5dt00356c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Experimental and theoretical magneto-structural correlations and DFT calculations carried out in six novel NiII complexes with uncommon structures.
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Affiliation(s)
- Itziar Oyarzabal
- Departamento de Química Aplicada
- Facultad de Química
- Universidad del País Vasco UPV/EHU
- Donostia-San Sebastián
- Spain
| | - José Ruiz
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
| | - Antonio J. Mota
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
| | | | - José M. Seco
- Departamento de Química Aplicada
- Facultad de Química
- Universidad del País Vasco UPV/EHU
- Donostia-San Sebastián
- Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada
- Spain
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37
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Hänninen MM, Mota AJ, Aravena D, Ruiz E, Sillanpää R, Camón A, Evangelisti M, Colacio E. TwoC3-Symmetric Dy3IIIComplexes with Triple Di-μ-methoxo-μ-phenoxo Bridges, Magnetic Ground State, and Single-Molecule Magnetic Behavior. Chemistry 2014; 20:8410-20. [DOI: 10.1002/chem.201402392] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Indexed: 11/10/2022]
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38
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Morcillo SP, Miguel D, Resa S, Martín-Lasanta A, Millán A, Choquesillo-Lazarte D, García-Ruiz JM, Mota AJ, Justicia J, Cuerva JM. Ti(III)-catalyzed cyclizations of ketoepoxypolyprenes: control over the number of rings and unexpected stereoselectivities. J Am Chem Soc 2014; 136:6943-51. [PMID: 24766517 DOI: 10.1021/ja411942h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe a new strategy to control the number of cyclization steps in bioinspired radical (poly)cyclizations involving epoxypolyenes containing keto units positioned along the polyene chain. This approach provides an unprecedentedly straightforward access to natural terpenoids with pendant unsaturated side chains. Additionally, in the case of bi- and tricyclizations, decalins with cis stereochemistry have been obtained as a consequence of the presence of the ketone. The preferential formation of cis-fused adducts was rationalized using DFT calculations. This result is completely unprecedented in biomimetic cyclizations and permits the access to natural terpenoids with this stereochemistry, as well as to non-natural analogues.
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Affiliation(s)
- Sara P Morcillo
- Department of Organic Chemistry and ‡Department of Inorganic Chemistry, Faculty of Sciences, University of Granada , C. U. Fuentenueva s/n, 18071 Granada, Spain
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39
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Gungor E, Kara H, Colacio E, Mota AJ. Two Tetranuclear Copper(II) Complexes with Open Cubane-Like Cu4O4Core Framework and Ferromagnetic Exchange Interactions between Copper(II) Ions: Structure, Magnetic Properties, and Density Functional Study. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301515] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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Botana L, Ruiz J, Mota AJ, Rodríguez-Diéguez A, Seco JM, Oyarzabal I, Colacio E. Anion controlled structural and magnetic diversity in unusual mixed-bridged polynuclear NiII complexes with a versatile bis(2-methoxy phenol)diamine hexadentate ligand. An experimental and theoretical magneto-structural study. Dalton Trans 2014; 43:13509-24. [DOI: 10.1039/c4dt01253d] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Six new polynuclear NiII complexes with uncommon structures have been magneto-structural studied.
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Affiliation(s)
- Luis Botana
- Departamento de Química Aplicada
- Facultad de Química
- UPV/EHU
- Donostia-San Sebastián, Spain
| | - José Ruiz
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada, Spain
| | - Antonio J. Mota
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada, Spain
| | | | - José M. Seco
- Departamento de Química Aplicada
- Facultad de Química
- UPV/EHU
- Donostia-San Sebastián, Spain
| | - Itziar Oyarzabal
- Departamento de Química Aplicada
- Facultad de Química
- UPV/EHU
- Donostia-San Sebastián, Spain
| | - Enrique Colacio
- Departamento de Química Inorgánica
- Facultad de Ciencias
- Universidad de Granada
- 18071 Granada, Spain
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41
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Martín-Lasanta A, Álvarez de Cienfuegos L, Johnson A, Miguel D, Mota AJ, Orte A, Ruedas-Rama MJ, Ribagorda M, Cárdenas DJ, Carmen Carreño M, Echavarren AM, Cuerva JM. Novel ortho-OPE metallofoldamers: binding-induced folding promoted by nucleating Ag(i)–alkyne interactions. Chem Sci 2014. [DOI: 10.1039/c4sc01988a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Ag(i)–alkyne interactions induce the folding of o-OPE foldamers, yielding a new class of metallofoldamers.
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Affiliation(s)
- Ana Martín-Lasanta
- Department of Organic Chemistry
- Faculty of Science
- University of Granada
- Granada, Spain
| | | | - Alice Johnson
- Institute of Chemical Research of Catalonia (ICIQ)
- Tarragona, Spain
| | - Delia Miguel
- Department of Organic Chemistry
- Faculty of Science
- University of Granada
- Granada, Spain
| | - Antonio J. Mota
- Inorganic Chemistry
- Faculty of Science
- University of Granada
- Granada, Spain
| | - Angel Orte
- Department of Physical Chemistry
- Faculty of Pharmacy
- University of Granada
- Granada, Spain
| | | | - Maria Ribagorda
- Department of Organic Chemistry
- Universidad Autónoma de Madrid
- Madrid, Spain
| | - Diego J. Cárdenas
- Department of Organic Chemistry
- Universidad Autónoma de Madrid
- Madrid, Spain
| | - M. Carmen Carreño
- Department of Organic Chemistry
- Universidad Autónoma de Madrid
- Madrid, Spain
| | | | - Juan M. Cuerva
- Department of Organic Chemistry
- Faculty of Science
- University of Granada
- Granada, Spain
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42
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Morcillo SP, Martínez-Peragón Á, Jakoby V, Mota AJ, Kube C, Justicia J, Cuerva JM, Gansäuer A. Highly regioselective and chemoselective titanocene mediated Barbier-type allylation reactions. Chem Commun (Camb) 2014; 50:2211-3. [DOI: 10.1039/c3cc49230c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New titanocene(iii) has been developed for chemoselective α-regioselective Barbier-type reactions, constituting the first titanocene(iii) able to tolerate epoxides and readily reduced carbonyl compounds.
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Affiliation(s)
- Sara P. Morcillo
- Department of Organic Chemistry
- University of Granada
- Granada 18071, Spain
| | | | - Verena Jakoby
- Kekulé-Institut für Organische Chemie und Biochemie
- Universität Bonn
- 53121 Bonn, Germany
| | - Antonio J. Mota
- Department of Inorganic Chemistry
- University of Granada
- Granada 18071, Spain
| | - Christian Kube
- Kekulé-Institut für Organische Chemie und Biochemie
- Universität Bonn
- 53121 Bonn, Germany
| | - José Justicia
- Department of Organic Chemistry
- University of Granada
- Granada 18071, Spain
| | - Juan M. Cuerva
- Department of Organic Chemistry
- University of Granada
- Granada 18071, Spain
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie
- Universität Bonn
- 53121 Bonn, Germany
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43
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Sánchez-Polo M, Abdel daiem MM, Ocampo-Pérez R, Rivera-Utrilla J, Mota AJ. Comparative study of the photodegradation of bisphenol A by HO(•), SO4(•-) and CO3(•-)/HCO3 radicals in aqueous phase. Sci Total Environ 2013; 463-464:423-431. [PMID: 23827363 DOI: 10.1016/j.scitotenv.2013.06.012] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 05/14/2013] [Accepted: 06/02/2013] [Indexed: 06/02/2023]
Abstract
The aim of this study was to determine the effectiveness of oxidation processes based on UV radiation (UV, UV/H2O2, UV/K2S2O8, and UV/Na2CO3) to remove bisphenol A (BPA) from aqueous solution. Results showed that UV radiation was not effective to remove BPA from the medium. The addition of radical promoters such as H2O2, K2S2O8, or Na2CO3 markedly increased the effectiveness of UV radiation through the generation of HO(•), SO4(•-), or CO3(•-)/HCO3(•) radicals, respectively. The reaction rate constants between BPA and HO(•), SO4(•-), and CO3(•-)/HCO3(•) radicals were k(HO(•)BPA)=1.70±0.21×10(10)M(-1)s(-1), k(SO4(•-)BPA)=1.37±0.15×10(9)M(-1)s(-1) and k(CO3(•-)/HCO3(•)BPA)=3.89±0.09×10(6)M(-1)s(-1), respectively. The solution pH had a major effect on BPA degradation with the UV/H2O2 system, followed by UV/K2S2O8, and UV/Na2CO3 systems. All oxidation systems in this study showed 100% effectiveness to remove BPA from wastewater, due to its large content of natural organic matter (NOM), which can absorb UV radiation and generate excited triplet states ((3)NOM*) and various reactive oxygen species. With all three systems, the total organic carbon in the medium was markedly decreased after 5 min of treatment. The toxicity of byproducts was higher than that of BPA when using UV/H2O2, similar to that of BPA with the UV/Na2CO3 system, and lower than that of BPA after 40 min of treatment with the UV/K2S2O8 system.
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Affiliation(s)
- Manuel Sánchez-Polo
- Department of Inorganic Chemistry, Faculty of Science, University of Granada, 18071, Granada, Spain.
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44
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Seppälä P, Colacio E, Mota AJ, Sillanpää R. Structural Diversity due to Amino Alcohol Ligands Leading to Rare μ4-Hydroxo-Bridged Tetranuclear and “Bicapped Cubane” Cores in Copper(II) Complexes: A Theoretical and Experimental Magnetostructural Study. Inorg Chem 2013; 52:11096-109. [DOI: 10.1021/ic401325b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Petri Seppälä
- Department
of Chemistry, University of Jyväskylä, P.O. Box 35, University of Jyväskylä,
FIN-40014 Jyväskylä, Finland
| | - Enrique Colacio
- Departamento de
Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. de Fuentenueva s/n, 18071 Granada, Spain
| | - Antonio J. Mota
- Departamento de
Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. de Fuentenueva s/n, 18071 Granada, Spain
| | - Reijo Sillanpää
- Department
of Chemistry, University of Jyväskylä, P.O. Box 35, University of Jyväskylä,
FIN-40014 Jyväskylä, Finland
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45
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Chandrasekhar V, Dey A, Mota AJ, Colacio E. Slow magnetic relaxation in Co(III)-Co(II) mixed-valence dinuclear complexes with a Co(II)O5X (X = Cl, Br, NO3) distorted-octahedral coordination sphere. Inorg Chem 2013; 52:4554-61. [PMID: 23557586 DOI: 10.1021/ic400073y] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of the multisite coordination ligand (LH4) with CoX2·nH2O in the presence of tetrabutylammonium hydroxide affords a series of homometallic dinuclear mixed-valence complexes, [Co(III)Co(II)(LH2)2(X)(H2O)](H2O)m (1, X = Cl and m = 4; 2, X = Br and m = 4; 3, X = NO3 and m = 3). All of the complexes have been structurally characterized by X-ray crystallography. Both cobalt ions in these dinuclear complexes are present in a distorted-octahedral geometry. Detailed magnetic studies on 1-3 have been carried out. M vs H data at different temperatures can be fitted with S = 3/2, the best fit leading to D(3/2) = -7.4 cm(-1), |E/D| < 1 × 10(-3), and g = 2.32 for 1 and D(3/2) = -9.7 cm(-1), |E/D| <1 × 10(-4), and g = 2.52 for 2. In contrast to 1 and 2, M vs H data at different temperatures suggest that compound 3 has comparatively little magnetic anisotropy. In accordance with the large negative D values observed for compounds 1 and 2, they are single-molecule magnets (SMMs) and exhibit slow relaxation of magnetization at low temperatures under an applied magnetic field of 1000 Oe with the following energy barriers: 7.9 cm(-1) (τo = 6.1 × 10(-6) s) for 1 and 14.5 cm(-1) (τo = 1.0 × 10(-6) s) for 2. Complex 3 does not show any SMM behavior, as expected from its small magnetic anisotropy. The τo values observed for 1 and 2 are much larger than expected for a SMM, strongly suggesting that the quantum pathway of relaxation at very low temperatures is not fully suppressed by the effects of the applied field.
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46
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Pramanik K, Malpaharia P, Mota AJ, Colacio E, Das B, Lloret F, Chandra SK. Stepwise Formation of a Pentanuclear Ni4Cu Heterometallic Complex Exhibiting a Vertex-Sharing Defective Double-Cubane Core and Diphenoxo- and Phenoxo/Azide Bridging Groups: A Magnetostructural and DFT Theoretical Study. Inorg Chem 2013; 52:3995-4001. [DOI: 10.1021/ic302784q] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Koushik Pramanik
- Department of Chemistry, Visva Bharati University, Santiniketan 731 235, India
| | - Pijush Malpaharia
- Department of Chemistry, Visva Bharati University, Santiniketan 731 235, India
| | - Antonio J. Mota
- Departamento de Química
Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida Fuentenueva s/n, 18002
Granada, Spain
| | - Enrique Colacio
- Departamento de Química
Inorgánica, Facultad de Ciencias, Universidad de Granada, Avenida Fuentenueva s/n, 18002
Granada, Spain
| | - Babulal Das
- Department of Chemistry, Indian Institute of Technology, Guwahati 781 039, India
| | - F. Lloret
- Instituto de Ciencia Molecular, Universitat de València, 46980
Paterna, València, Spain
| | - Swapan K. Chandra
- Department of Chemistry, Visva Bharati University, Santiniketan 731 235, India
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47
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Hänninen MM, Välivaara J, Mota AJ, Colacio E, Lloret F, Sillanpää R. Ferromagnetic dinuclear mixed-valence Mn(II)/Mn(III) complexes: building blocks for the higher nuclearity complexes. structure, magnetic properties, and density functional theory calculations. Inorg Chem 2013; 52:2228-41. [PMID: 23363337 DOI: 10.1021/ic302731z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of six mixed-valence Mn(II)/Mn(III) dinuclear complexes were synthesized and characterized by X-ray diffraction. The reactivity of the complexes was surveyed, and structures of three additional trinuclear mixed-valence Mn(III)/Mn(II)/Mn(III) species were resolved. The magnetic properties of the complexes were studied in detail both experimentally and theoretically. All dinuclear complexes show ferromagnetic intramolecular interactions, which were justified on the basis of the electronic structures of the Mn(II) and Mn(III) ions. The large Mn(II)-O-Mn(III) bond angle and small distortion of the Mn(II) cation from the ideal square pyramidal geometry were shown to enhance the ferromagnetic interactions since these geometrical conditions seem to favor the orthogonal arrangement of the magnetic orbitals.
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Affiliation(s)
- Mikko M Hänninen
- Department of Chemistry, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland
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48
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Fuentes N, Martin-Lasanta A, Alvarez de Cienfuegos L, Robles R, Choquesillo-Lazarte D, García-Ruiz JM, Martínez-Fernández L, Corral I, Ribagorda M, Mota AJ, Cárdenas DJ, Carreño MC, Cuerva JM. Versatile Bottom-up Approach to Stapled π-Conjugated Helical Scaffolds: Synthesis and Chiroptical Properties of Cyclico-Phenylene Ethynylene Oligomers. Angew Chem Int Ed Engl 2012; 51:13036-40. [DOI: 10.1002/anie.201206259] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Revised: 09/13/2012] [Indexed: 11/06/2022]
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49
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Fuentes N, Martin-Lasanta A, Alvarez de Cienfuegos L, Robles R, Choquesillo-Lazarte D, García-Ruiz JM, Martínez-Fernández L, Corral I, Ribagorda M, Mota AJ, Cárdenas DJ, Carreño MC, Cuerva JM. Versatile Bottom-up Approach to Stapled π-Conjugated Helical Scaffolds: Synthesis and Chiroptical Properties of Cyclico-Phenylene Ethynylene Oligomers. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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50
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Mota AJ, Álvarez de Cienfuegos L, Morcillo SP, Fuentes N, Miguel D, Rodríguez-Bolívar S, Gómez-Campos FM, Cárdenas DJ, Cuerva JM. Thermally Driven Nanofuses Based on Organometallic Rotors. Chemphyschem 2012; 13:3857-65. [DOI: 10.1002/cphc.201200544] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 09/17/2012] [Indexed: 11/07/2022]
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