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Khan MA, Ilyas M, Kalsoom S, Abbas M, Zohaib HM, Ilyas M, Balouch FN, Rasheed M, Iqbal J. In-silico optimization of resveratrol interaction with nano-borophene: A DFT-guided study of supramolecular artistry. Comput Biol Chem 2024; 112:108179. [PMID: 39197396 DOI: 10.1016/j.compbiolchem.2024.108179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Revised: 08/15/2024] [Accepted: 08/17/2024] [Indexed: 09/01/2024]
Abstract
In this study, the potential of borophene (BOR) as a drug delivery system for resveratrol (RVT) was explored to evaluate its efficacy in cancer treatment. The excited, electronic, and geometric states of RVT, BOR, and the borophene-adsorbed resveratrol complex (BOR@RVT) were calculated to assess BOR's suitability as a drug carrier. Noncovalent interaction (NCI) plots indicated a weak force of attraction between BOR and RVT, which facilitates the offloading of RVT at the target site. Frontier molecular orbital (FMO) analysis showed that during electron excitation from Highest Occupied Molecular Orbital (HOMO) to Lowest Unoccupied Molecular Orbital (LUMO), charge transfer occurs from RVT to BOR. This was further confirmed by charge decomposition analysis (CDA). Calculations for the excited state of BOR@RVT revealed a red shift in the maximum absorption wavelength (λmax), indicating a photoinduced electron transfer (PET) process across various excited states. PET analysis demonstrated fluorescence quenching due to this interaction. Our findings suggest that BOR holds significant potential as a drug delivery vehicle for cancer treatment, offering a promising platform for the development of advanced drug delivery systems.
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Affiliation(s)
- Maroof Ahmad Khan
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China.
| | - Mubashar Ilyas
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
| | - Shehwas Kalsoom
- Department of Chemistry, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Abbas
- Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
| | - Hafiz Muhammad Zohaib
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Mudassar Ilyas
- Department of Chemistry, Emerson University Multan, 60000, Pakistan
| | | | - Mohsin Rasheed
- Department of Chemistry, Bahauddin Zakariya University, Multan, Pakistan
| | - Javed Iqbal
- Department of Chemistry, University of Agriculture, Faisalabad 38000, Pakistan.
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2
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Khan MA, Kalsoom S, Ayub AR, Ilyas M, Hassan N, Irshad K, Zeshan M, Arshad S, Zahid MN, El-Fattah AA, Iqbal J. Host-guest coupling to potentially increase the bio-accessibility of 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea by nanocarrier graphyne for brain tumor therapy, a comprehensive quantum mechanics study. J Mol Graph Model 2023; 123:108517. [PMID: 37235904 DOI: 10.1016/j.jmgm.2023.108517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 05/02/2023] [Accepted: 05/07/2023] [Indexed: 05/28/2023]
Abstract
This study aimed to explore the potential of Host-Guest coupling with Nanocarrier graphyne (GPH) to enhance the bioavailability of the drug 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea (LUM) for brain tumor therapy. The electronic, geometric, and excited-state properties of GPH, LUM, and the graphyne@1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea-complex (GPH@LUM-complex) were studied using DFT B3LYP/6-31G** level of theory. The results showed that the GPH@LUM-complex was stable with negative adsorption energy (-0.20 eV), and there was good interaction between GPH and LUM in the solvent phase. The weak interaction forces between the two indicated an easy release of the drug at the target site. The Frontier Molecular Orbitals (FMO), Charge Density Analysis (CDA), and Natural Bond Orbital (NBO) analysis supported LUM to GPH charge transfer during complex formation, and the Reduced Density Gradient (RDG) isosurfaces identified steric effects and non-bonded interactions. UV-visible examination showed the potential of the GPH@LUM-complex as a drug carrier with a blue shift of 23 nm wavelength in the electronic spectra. The PET process analysis revealed a fluorescence-quenching process, facilitating systematic drug delivery. The study concluded that GPH had potential as a carrier for delivering LUM, and different 2D nanomaterials could be explored for drug delivery applications. The theoretical study's findings may motivate researchers to investigate the practical applications of GPH@LUM-complex in oncology.
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Affiliation(s)
- Maroof Ahmad Khan
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Shehwas Kalsoom
- Department of Chemistry, Concordia College Sahiwal, Pakistan
| | - Ali Raza Ayub
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Mubashar Ilyas
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Noor Hassan
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, PR China
| | - Kanwal Irshad
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Muhammad Zeshan
- Department of Pharmaceutical Chemistry, Government College University Faisalabad, Pakistan
| | - Salba Arshad
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Muhammad Nauman Zahid
- Department of Biology, College of Science, University of Bahrain, Sakhir, P.O. Box 32038, Bahrain
| | - Ahmed Abd El-Fattah
- Department of Chemistry, College of Science, University of Bahrain, Sakhir, P.O. Box 32038, Bahrain; Department of Materials Science, Institute of Graduate Studies and Research, Alexandria University, Alexandria, 21526, Egypt
| | - Javed Iqbal
- Department of Chemistry, University of Agriculture, Faisalabad, 38000, Pakistan; Department of Chemistry, College of Science, University of Bahrain, Sakhir, P.O. Box 32038, Bahrain.
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3
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Xiao B, Sun TY, Wu YD. Study of Pd-catalyzed Selective Mono- and Di-C(sp 3)-H Bond Activation: A Bi-ligand Model. J Org Chem 2022; 87:10958-10966. [PMID: 35901268 DOI: 10.1021/acs.joc.2c01235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Controlling the number of C-H bond activation is a long-standing challenge in organic synthesis. Recently, Yu's group demonstrated that in Pd-catalyzed alanine's arylation, pyridine-type ligands favor a mono-C-H bond activation, while quinoline-type ligands favor a di-C-H bond activation. To disclose the underlying principles, a theoretical study (density functional theory (DFT)) has been carried out. Our study indicates that a mono-ligand model, which is generally adopted in the community, does not reproduce the experimentally observed mono-/di-selectivity, while a bi-ligand model can rationalize the experimental observations well, including the observed diastereoselectivity in diarylation. The electron-rich pyridine-type ligands with less steric congestion can promote the C-H bond activation reaction of alanine derivatives. The quinoline-type ligands have a better π back-donation interaction with the metal, which makes a more active C-H bond activation than the pyridine-type ligands for this reaction. This bi-ligand model, which is a necessity, allows the understanding and future design of a dual ligand effect in C-H bond activation.
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Affiliation(s)
- Bo Xiao
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Computational Chemistry and Drug Design, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Tian-Yu Sun
- Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Yun-Dong Wu
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Computational Chemistry and Drug Design, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China.,Shenzhen Bay Laboratory, Shenzhen 518132, China.,College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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4
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Ji W, Xiao X, Li F, Fan X, Meng Y, Fan M. Theoretical insight into mercury species adsorption on graphene-based Pt single-atom catalysts. RSC Adv 2022; 12:5797-5806. [PMID: 35424583 PMCID: PMC8981981 DOI: 10.1039/d1ra08891b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/24/2022] [Indexed: 01/23/2023] Open
Abstract
Mercury emission from coal-fired flue gases is environmentally crucial. Revealing the interaction between mercury (Hg) and functional materials is significant to controlling emission. We conducted an investigation into the adsorption mechanism of mercury species onto graphene-based Platinum (Pt) single-atom catalysts (SACs). Single-atom Pt is the active center for Hg species chemisorption, with an adsorption energy range of 0.555-3.792 eV. In addition, Hg species adsorbed preferentially at lower temperatures. Pt/3N-GN exhibits a higher adsorption ability than Pt/SV-GN. The strong interaction of Hg0 with Pt SACs contributed to atomic-orbital hybridization between them. Further analysis revealed that s, p orbitals of Hg contribute significantly to orbital hybridization with Pt SACs. Moreover, the charge decomposition analysis confirmed that s, p orbitals of Hg hybridized with d, s orbitals of Pt SACs. The net charge transfer from Hg0 to Pt/SV-GN and Pt/3N-GN are 0.059 and 0.097 e-, respectively. The higher the charge transfers, the more intense the electron and orbital interaction between Hg and the surface. Consequently, Pt/3N-GN is a highly effective catalyst for Hg adsorption.
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Affiliation(s)
- Wenchao Ji
- College of Resource and Environment, Anhui Science and Technology University Fengyang 233100 China
| | - Xiuhua Xiao
- College of Resource and Environment, Anhui Science and Technology University Fengyang 233100 China
| | - Feiyue Li
- College of Resource and Environment, Anhui Science and Technology University Fengyang 233100 China
| | - Xingjun Fan
- College of Resource and Environment, Anhui Science and Technology University Fengyang 233100 China
| | - Yuanyuan Meng
- College of Chemistry & Chemical Engineering, Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Maohong Fan
- Departments of Chemical and Petroleum Engineering, University of Wyoming Laramie WY 82071 USA
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5
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Pietro WJ, Lever ABP. Ligand Electrochemical Parameter Approach to Molecular Design. σ-Donation, π-Back Donation, and Other Metrics in Ruthenium(II) Dinitrogen Complexes. Inorg Chem 2022; 61:1869-1880. [PMID: 35016502 DOI: 10.1021/acs.inorgchem.1c02707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using the density functional theory, [(N2)RuIIL5]n+ species are studied in silico. The properties of the Ru-N2 bond are derived, including σ-donation, π-back donation, Ru-N and N-N bond lengths and bond orders, net charges and NN stretching frequencies, and so forth. These data are correlated using the ligand electrochemical parameter (EL) theory, whereby the availability of electrons in the [RuL5]n+ fragment is defined by its electron richness, which is the sum of the EL parameters, ΣEL(L5). The objective is to better understand the binding of the N2 ligand, leading to a molecular design whereby a specific species is constructed to have a desired property, for example, a particular bond length or charge. We supply cubic expressions linking ΣEL(L5) with these many metrics, allowing researchers to predict metric values of their own systems. The extended charge decomposition analysis is used. For the given target, N2, σ-bonding does not vary greatly with the nature of ligand L, and π-back donation is the dominant property deciding the magnitudes of the various metrics. The EL parameter provides the path to design the desired species. This contribution is devoted to dinitrogen, but the method is expected to be general for any ligand, including polydentate ligands.
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Affiliation(s)
- William J Pietro
- Department of Chemistry, York University, Toronto, M3J1P3 Ontario, Canada
| | - A B P Lever
- Department of Chemistry, York University, Toronto, M3J1P3 Ontario, Canada
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Zhang Y, Huang F, Wang L, Guan R, Yu H, Wang L, Qu J, Gao M, Du S. Facilitating effect of heavy metals on di(2-ethylhexyl) phthalate adsorption in soil: New evidence from adsorption experiment data and quantum chemical simulation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 772:144980. [PMID: 33581542 DOI: 10.1016/j.scitotenv.2021.144980] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 01/01/2021] [Accepted: 01/01/2021] [Indexed: 06/12/2023]
Abstract
In terms of researching and treating farmland pollution, interactions between organic and inorganic pollutants are very important aspects. Herein, the effects of heavy metals on di(2-ethylhexyl) phthalate (DEHP) adsorption in soil were investigated. The presence of Cd2+/Cu2+ increased the adsorption capacity of DEHP (>23%) in a nonlinear manner. Fourier transform infrared spectroscopy revealed that the stretching vibration of soil functional groups changed under different pollution combinations, while quantum chemical simulation, including an independent gradient model and localized orbital locator, proved that outer-orbital complexes could be formed by electrostatic interaction between Cd2+/Cu2+ and DEHP. The electron transfer process was analyzed by charge decomposition analyses, and these, combined with bond critical point analyses, revealed that metal ions reduced DEHP stability. The binding energy and binding free energy of different combinations were calculated and analyzed, using the key soil organic matter (SOM) information obtained through pyrolysis gas chromatography mass spectrometry. This effectively explained the adsorption behavior, and showed that SOM polar functional groups played an important role in the effect of heavy metals on DEHP adsorption. The study described here has provided a new basis for understanding the multiple interactions, accumulation, and transformation of pollutants in the soil.
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Affiliation(s)
- Ying Zhang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China.
| | - Fuxin Huang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Lei Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Rui Guan
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Hui Yu
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Lei Wang
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Jianhua Qu
- School of Resources and Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Mengshan Gao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China
| | - Shiyu Du
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Engineering and Technology, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, PR China
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7
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Cetylpyridinium picrate: Spectroscopy, conductivity and DFT investigation of the structure of a new ionic liquid. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129803] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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8
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Avila M, Torres L, Montero-Alejo AL, Reguera L, Reguera E. On the CN -K coordination modes in K n[M 6-n(CN) 6]·xH 2O: first evidence of CN -K electron-deficient bonding. Dalton Trans 2021; 50:2510-2520. [PMID: 33514974 DOI: 10.1039/d0dt04019c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on the determination of single crystal XRD structures of potassium hexacyanidometallates and on IR, and Raman data, here we propose for the first time the occurrence of an electron-deficient bonding between the N end of the CN- ligand and the K+ metal center. The crystal structures of Kn[M6-n(CN)6]·xH2O (M = Fe(ii), Ru(ii), Os(ii), Co(iii), Rh(iii), Ir(iii), Pt(iv)) reveal the presence of four types of CN-K interactions: (i) a linear CN-K bond, (ii) the N ends in a bipodal coordination involving two K atoms, (iii) the N ends in a tripodal coordination mode involving three K atoms and (iv) the N ends and the K atoms with the largest K-N distances within the subseries that can be attributed to the electrostatic interactions. The bi- and tripodal coordination modes between the N end of the CN- ligand and K+ ions are atypical and their nature is discussed in this contribution. The CN- ligand N end can behave as a two-electron donor that participates in a three-center two-electron bonding (i.e. Class II μ-L 3c-2e) for a N-bipodal coordination mode or as a two-electron donor that participates in a four-center two-electron bonding (4c-2e) for an N-tripodal coordination mode. Such a possibility is closely related to the π-back donation ability of the CN- ligand, which results in a charge density accumulation on the N end, which could be partially donated to the K atom through an σ-mechanism. For the divalent metals (Fe, Ru, Os), the solids crystallize with a monoclinic unit cell in the C2/c space group, while for the trivalent ones (Co, Rh, Ir), the crystal structure corresponds to an orthorhombic unit cell in the Pbcn space group. Potassium hexacyanidoplatinate(iv) crystallizes with a trigonal unit cell, in the P3[combining macron]1m space group, where each N end is always found coordinating two K atoms. The finding of these novel coordination modes of the CN- ligands, relying on an electron-deficient bonding behavior, paves the way for the design of functional materials based on hexacyanidometallates. The experimental results and the proposed electron-deficient bonding model herein discussed were appropriately supported by the computational calculations.
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Affiliation(s)
- Manuel Avila
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, U. Legaria, Ciudad México, Mexico.
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9
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Ravaei I, Azami SM. Block deformation analysis: Density matrix blocks as intramolecular deformation density. J Comput Chem 2020; 41:2446-2458. [PMID: 32844467 DOI: 10.1002/jcc.26400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 07/04/2020] [Accepted: 07/28/2020] [Indexed: 11/07/2022]
Abstract
Block deformation analysis as deformation density of atomic orbitals is introduced to analyze intramolecular interactions. In this respect, density matrix blocks in terms of natural atomic orbitals are employed to find interacting and noninteracting multicenter subsystem and extract the corresponding deformation density. Eigenanalysis of this deformation density is performed to result eigenvalues and eigenorbitals as displaced charge due to the intramolecular interaction and orbital space responsible for charge reorganization, respectively, that possesses advantages of other methods, simultaneously. It is applied to several small molecules, different types of carbon allotropes including zero-, one-, and two-dimensional nanostructures, and challenging systems such as ortho-hydrogen atoms in planar biphenyl. Results highly correlate with delocalization and Wiberg bond indices and show that eigenvalues of block deformation analysis deserved to be considered as bonding index.
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Affiliation(s)
- Isa Ravaei
- Chemistry Department, College of Sciences, Yasouj University, Yasouj, Iran
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10
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A theoretical investigation of the fragment interaction and nonlinear optical and electronic properties of tris(β-diketonato)iron(III) complexes. Struct Chem 2020. [DOI: 10.1007/s11224-019-01388-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Sadhu B, Dolg M. Enhancing Actinide(III) over Lanthanide(III) Selectivity through Hard-by-Soft Donor Substitution: Exploitation and Implication of Near-Degeneracy-Driven Covalency. Inorg Chem 2019; 58:9738-9748. [DOI: 10.1021/acs.inorgchem.9b00705] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Biswajit Sadhu
- Health Physics Division, Health Safety & Environment Group, Bhabha Atomic Research Center (BARC), Mumbai 400 085. India
| | - Michael Dolg
- Institute for Theoretical Chemistry, University of Cologne, Greinstrasse 4, 50939 Cologne, Germany
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12
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Theoretical evaluation of microscopic structural and macroscopic thermo-physical properties of molten AF-ThF4 systems (A+ = Li+, Na+ and K+). J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.078] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Kia R, Hosseini M, Abdolrahimi A, Mahmoudi M. Intermolecular C–H⋯O and n → π* and short intramolecular σ → π* interactions in the molybdenum(0) tetracarbonyl complex of a very twisted 14-membered tetraazaannulene macrocyclic ligand: structural and computational studies. CrystEngComm 2019. [DOI: 10.1039/c9ce01005j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An interesting intermolecular n → π* interaction supported an intermolecular C–H⋯O interaction in a molybdenum tetracarbonyl complex of a substituted dibenzo-tetraazaannulene complex to consolidate the crystal packing in the solid state.
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Affiliation(s)
- Reza Kia
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
| | - Mahsa Hosseini
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
| | | | - Melika Mahmoudi
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
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14
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Sadhu B, Mishra V. The coordination chemistry of lanthanide and actinide metal ions with hydroxypyridinone-based decorporation agents: orbital and density based analyses. Dalton Trans 2018; 47:16603-16615. [PMID: 30417921 DOI: 10.1039/c8dt03262a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the context of the mitigation of the biological effects of internal radionuclide contamination and for efficient decorporation, the design and development of efficient chelators for lanthanide and actinide metal ions has become a central issue. The pioneering work of Raymond and coworkers (Chem. Rev., 2003, 103, 4207-4282) led to the development of siderophore-related hydroxypyridinonate ligands for possible treatment of internalized radionuclides. However, the structure-function relationship of Ln/An bound to these ligands, particularly the bonding and coordination aspects are not clearly understood at the atomic level. Here, we have investigated the structure, binding and energetics of trivalent and tetravalent Ln/An (Sm3+, Eu3+, Am3+, Cm3+, Th4+, Pu4+) ions with spermine-based octadentate hydroxypyridinonate chelators, namely 3,4,3-LI(1,2-HOPO) and its 3,3,3 variant, using relativistic density functional theory (DFT). Furthermore, we have performed orbital and density based analyses to elucidate the nature of bonding in these complexes. In accordance with the experimental stability constant, we found the maximum binding free energy for An4+ (Pu4+, Th4+) as compared to trivalent metal ions. CDA and ECDA analyses along with orbital-based population analyses confirmed the higher ligand to metal charge transfer for An4+ than for trivalent metal ions. Furthermore, the aromaticity index analysis suggested the presence of crucial chelatoaromatic stabilization for all these metal ions with the maximum for An4+. QTAIM descriptors indicated that the binding of An/Ln with the hard oxygen donor of the ligands is of the donor-acceptor type but a higher degree of covalency exists for actinides as compared to lanthanides. Furthermore, QTAIM and molecular orbital analysis confirmed that such covalency is of the energy-driven type and strictly originates from the orbital mixing event of An-5f orbitals with the ligand orbitals.
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Affiliation(s)
- Biswajit Sadhu
- Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India.
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15
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Armstrong D, Kirk SM, Murphy C, Guerriero A, Peruzzini M, Gonsalvi L, Phillips AD. Water-Soluble Silver(I) Complexes Featuring the Hemilabile 3,7-Dimethyl-1,3,5-triaza-7-phosphabicyclo[3.3.1]nonane Ligand: Synthesis, Characterization, and Antimicrobial Activity. Inorg Chem 2018; 57:6309-6323. [DOI: 10.1021/acs.inorgchem.8b00227] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Antonella Guerriero
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Florence, Italy
| | - Maurizio Peruzzini
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Florence, Italy
- Dipartimento di Scienze Chimiche e Tecnologia dei Materiali (DSCTM), Consiglio Nazionale delle Ricerche (CNR), Via dei Taurini 19, 00185 Rome, Italy
| | - Luca Gonsalvi
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Florence, Italy
| | - Andrew D. Phillips
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Florence, Italy
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16
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Shahsavari HR, Fereidoonnezhad M, Niazi M, Mosavi ST, Habib Kazemi S, Kia R, Shirkhan S, Abdollahi Aghdam S, Raithby PR. Cyclometalated platinum(ii) complexes of 2,2'-bipyridine N-oxide containing a 1,1'-bis(diphenylphosphino)ferrocene ligand: structural, computational and electrochemical studies. Dalton Trans 2018; 46:2013-2022. [PMID: 28116396 DOI: 10.1039/c6dt04085c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation and characterization of new heteronuclear-platinum(ii) complexes containing a 1,1'-bis(diphenylphosphino)ferrocene (dppf) ligand are described. The reaction of the known starting complex [PtMe(κ2N,C-bipyO-H)(SMe2)], A, in which bipyO-H is a cyclometalated rollover 2,2'-bipyridine N-oxide, with the dppf ligand in a 2 : 1 ratio or an equimolar ratio led to the formation of the corresponding binuclear complex [Pt2Me2(κ2N,C-bipyO-H)2(μ-dppf)], 1, or the mononuclear complex [PtMe(κ1C-bipyO-H)(dppf)], 2, respectively. According to the reaction conditions, the dppf ligand in 1 and 2 behaves as either a bridging or chelating ligand. All complexes were characterized by NMR spectroscopy. The solid-state structure of 2 was determined by the single-crystal X-ray diffraction method and it was shown that the chelating dppf ligand in this complex was arranged in a "synclinal-staggered" conformation. Also, the occurrence of intermolecular C-HCpObipyO-H interactions in the solid-state gave rise to an extended 1-D network. The electronic absorption spectra and the electrochemical behavior of these complexes are discussed. Density functional theory (DFT) was used for geometry optimization of the singlet states in solution and for electronic structure calculations. The analysis of the molecular orbital (MO) compositions in terms of occupied and unoccupied fragment orbitals in 2 was performed.
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Affiliation(s)
- Hamid R Shahsavari
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Yousef Sobouti Blvd., Zanjan 45137-6731, Iran.
| | - Masood Fereidoonnezhad
- Department of Medicinal Chemistry, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. and Cancer, Environmental and Petroleum Pollutants Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maryam Niazi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Yousef Sobouti Blvd., Zanjan 45137-6731, Iran.
| | - S Talaat Mosavi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Yousef Sobouti Blvd., Zanjan 45137-6731, Iran.
| | - Sayed Habib Kazemi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Yousef Sobouti Blvd., Zanjan 45137-6731, Iran.
| | - Reza Kia
- Chemistry Department, Sharif University of Technology, P.O. Box 11155-3516, Tehran, Iran.
| | - Shima Shirkhan
- Department of Medicinal Chemistry, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Siamak Abdollahi Aghdam
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Yousef Sobouti Blvd., Zanjan 45137-6731, Iran.
| | - Paul R Raithby
- Department of Chemistry, University of Bath, Claverton Down, Bath, Avon BA2 7AY, UK
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17
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Lecarme L, Chiang L, Moutet J, Leconte N, Philouze C, Jarjayes O, Storr T, Thomas F. The structure of a one-electron oxidized Mn(iii)-bis(phenolate)dipyrrin radical complex and oxidation catalysis control via ligand-centered redox activity. Dalton Trans 2018; 45:16325-16334. [PMID: 27711805 DOI: 10.1039/c6dt02163h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The tetradentate ligand dppH3, which features a half-porphyrin and two electron-rich phenol moieties, was prepared and chelated to manganese. The mononuclear Mn(iii)-dipyrrophenolate complex 1 was structurally characterized. The metal ion lies in a square pyramidal environment, the apical position being occupied by a methanol molecule. Complex 1 displays two reversible oxidation waves at 0.00 V and 0.47 V vs. Fc+/Fc, which are assigned to ligand-centered processes. The one-electron oxidized species 1+ SbF6- was crystallized, showing an octahedral Mn(iii) center with two water molecules coordinated at both apical positions. The bond distance analysis and DFT calculations disclose that the radical is delocalized over the whole aromatic framework. Complex 1+ SbF6- exhibits an Stot = 3/2 spin state due to the antiferromagnetic coupling between Mn(iii) and the ligand radical. The zero field splitting parameters are D = 1.6 cm-1, E/D = 0.18(1), g⊥ = 1.99 and g∥ = 1.98. The dication 12+ is an integer spin system, which is assigned to a doubly oxidized ligand coordinated to a Mn(iii) metal center. Both 1 and 1+ SbF6- catalyze styrene oxidation in the presence of PhIO, but the nature of the main reaction product is different. Styrene oxide is the main reaction product when using 1, but phenylacetaldehyde is formed predominantly when using 1+ SbF6-. We examined the ability of complex 1+ SbF6- to catalyze the isomerization of styrene oxide and found that it is an efficient catalyst for the anti-Markovnikov opening of styrene oxide. The formation of phenylacetaldehyde from styrene therefore proceeds in a tandem E-I (epoxidation-isomerization) mechanism in the case of 1+ SbF6-. This is the first evidence of control of the reactivity for styrene oxidation by changing the oxidation state of a catalyst based on a redox-active ligand.
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Affiliation(s)
- Laureline Lecarme
- Département de Chimie Moléculaire - Chimie Inorganique Redox (CIRE) - UMR CNRS 5250, Université Grenoble Alpes, B. P. 53, 38041 Grenoble cedex 9, France.
| | - Linus Chiang
- Simon Fraser University, Department of Chemistry, 8888 University Drive, Burnaby, British Columbia V5A-1S4, Canada
| | - Jules Moutet
- Département de Chimie Moléculaire - Chimie Inorganique Redox (CIRE) - UMR CNRS 5250, Université Grenoble Alpes, B. P. 53, 38041 Grenoble cedex 9, France.
| | - Nicolas Leconte
- Département de Chimie Moléculaire - Chimie Inorganique Redox (CIRE) - UMR CNRS 5250, Université Grenoble Alpes, B. P. 53, 38041 Grenoble cedex 9, France.
| | - Christian Philouze
- Département de Chimie Moléculaire - Chimie Inorganique Redox (CIRE) - UMR CNRS 5250, Université Grenoble Alpes, B. P. 53, 38041 Grenoble cedex 9, France.
| | - Olivier Jarjayes
- Département de Chimie Moléculaire - Chimie Inorganique Redox (CIRE) - UMR CNRS 5250, Université Grenoble Alpes, B. P. 53, 38041 Grenoble cedex 9, France.
| | - Tim Storr
- Simon Fraser University, Department of Chemistry, 8888 University Drive, Burnaby, British Columbia V5A-1S4, Canada
| | - Fabrice Thomas
- Département de Chimie Moléculaire - Chimie Inorganique Redox (CIRE) - UMR CNRS 5250, Université Grenoble Alpes, B. P. 53, 38041 Grenoble cedex 9, France.
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18
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Wang Y. Maximum bonding fragment orbitals for deciphering complex chemical interactions. Phys Chem Chem Phys 2018; 20:13792-13809. [DOI: 10.1039/c8cp01808a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An optimal set of fragment orbitals is proposed as a simple and powerful tool for analyzing complex bonding interactions.
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Affiliation(s)
- Yang Wang
- Departamento de Química, Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem)
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19
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Loftus LM, Li A, Fillman KL, Martin PD, Kodanko JJ, Turro C. Unusual Role of Excited State Mixing in the Enhancement of Photoinduced Ligand Exchange in Ru(II) Complexes. J Am Chem Soc 2017; 139:18295-18306. [PMID: 29226680 PMCID: PMC5901749 DOI: 10.1021/jacs.7b09937] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Four Ru(II) complexes were prepared bearing two new tetradentate ligands, cyTPA and 1-isocyTPQA, which feature a piperidine ring that provides a structurally rigid backbone and facilitates the installation of other donors as the fourth chelating arm, while avoiding the formation of stereoisomers. The photophysical properties and photochemistry of [Ru(cyTPA)(CH3CN)2]2+ (1), [Ru(1-isocyTPQA)(CH3CN)2]2+ (2), [Ru(cyTPA)(py)2]2+ (3), and [Ru(1-isocyTPQA)(py)2]2+ (4) were compared. The quantum yield for the CH3CN/H2O ligand exchange of 2 was measured to be Φ400 = 0.033(3), 5-fold greater than that of 1, Φ400 = 0.0066(3). The quantum yields for the py/H2O ligand exchange of 3 and 4 were lower, 0.0012(1) and 0.0013(1), respectively. DFT and related calculations show the presence of a highly mixed 3MLCT/3ππ* excited state as the lowest triplet state in 2, whereas the lowest energy triplet states in 1, 3, and 4 were calculated to be 3LF in nature. The mixed 3MLCT/3ππ* excited state places significant spin density on the quinoline moiety of the 1-isocyTPQA ligand positioned trans to the photolabile CH3CN ligand in 2, suggesting the presence of a trans-type influence in the excited state that enhances ligand exchange. Ultrafast spectroscopy was used to probe the excited states of 1-4, which confirmed that the mixed 3MLCT/3ππ* excited state in 2 promotes ligand dissociation, representing a new manner to effect photoinduced ligand exchange. The findings from this work can be used to design improved complexes for applications that require efficient ligand dissociation, as well as for those that require minimal deactivation of the 3MLCT state through low-lying metal-centered states.
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Affiliation(s)
- Lauren M. Loftus
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Ao Li
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Kathlyn L. Fillman
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Philip D. Martin
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Jeremy J. Kodanko
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Claudia Turro
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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20
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Taherpour AA, Jamshidi M, Rezaei O. DFT and TD-DFT theoretical studies on photo-induced electron transfer process on [Cefamandole].C60 nano-complex. J Mol Graph Model 2017; 75:42-48. [DOI: 10.1016/j.jmgm.2017.04.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 04/08/2017] [Accepted: 04/10/2017] [Indexed: 01/17/2023]
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21
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Tsipis AC. RETRACTED: DFT challenge of intermetallic interactions: From metallophilicity and metallaromaticity to sextuple bonding. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.08.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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22
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Ling H, Xia M, Chen W, Chai Z, Wang D. Influence of denticity and combined soft–hard strategy on the interaction of picolinic-type ligands with NpO2+. RSC Adv 2017. [DOI: 10.1039/c6ra26114k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The denticity of the ligands and the combined hard–soft donor strategy work cooperatively in the coordination of NpO2+ with ligands.
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Affiliation(s)
- Hongcai Ling
- College of Chemistry
- Fuzhou University
- Fuzhou 350116
- P. R. China
- Multidisciplinary Initiative Center
| | - Miaoren Xia
- Multidisciplinary Initiative Center
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049
- P. R. China
| | - Wenkai Chen
- College of Chemistry
- Fuzhou University
- Fuzhou 350116
- P. R. China
- Key Laboratory of Applied Nuclear Techniques in Geosciences Sichuan
| | - Zhifang Chai
- Multidisciplinary Initiative Center
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049
- P. R. China
| | - Dongqi Wang
- Multidisciplinary Initiative Center
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049
- P. R. China
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23
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Iannuzzi TE, Gao Y, Baker TM, Deng L, Neidig ML. Magnetic circular dichroism and density functional theory studies of electronic structure and bonding in cobalt(ii)–N-heterocyclic carbene complexes. Dalton Trans 2017; 46:13290-13299. [DOI: 10.1039/c7dt01748k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The combination of simple cobalt salts and N-heterocyclic carbene (NHC) ligands has been highly effective in C–H functionalization, hydroarylation and cross-coupling catalysis, though displaying a strong dependence on the identity of the NHC ligand.
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Affiliation(s)
| | - Yafei Gao
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Shanghai
| | - Tessa M. Baker
- Department of Chemistry
- University of Rochester
- Rochester
- USA
| | - Liang Deng
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Shanghai
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24
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Kia R, Safari F. Synthesis, spectral and structural characterization and computational studies of rhenium(I)-tricarbonyl nitrito complexes of 2,2′-bipyridine and 2,9-dimethylphenanthroline ligands: π-Accepting character of the diimine ligands. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.08.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Khan MS, Srivastava A, Pandey R. Electronic properties of a pristine and NH3/NO2 adsorbed buckled arsenene monolayer. RSC Adv 2016. [DOI: 10.1039/c6ra15005e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The electronic charge density associated with the inter-frontier orbitals of (a) NH3 arsenene and (b) NO2-arsenene.
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Affiliation(s)
- Md. Shahzad Khan
- Advanced Materials Research Group
- CNT Lab
- ABV-Indian Institute of Information Technology and Management
- Gwalior
- India
| | - Anurag Srivastava
- Advanced Materials Research Group
- CNT Lab
- ABV-Indian Institute of Information Technology and Management
- Gwalior
- India
| | - Ravindra Pandey
- Department of Physics
- Michigan Technological University
- Houghton
- USA
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26
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Clarke RM, Hazin K, Thompson JR, Savard D, Prosser KE, Storr T. Electronic Structure Description of a Doubly Oxidized Bimetallic Cobalt Complex with Proradical Ligands. Inorg Chem 2015; 55:762-74. [DOI: 10.1021/acs.inorgchem.5b02231] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Ryan M. Clarke
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Khatera Hazin
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - John R. Thompson
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Didier Savard
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Kathleen E. Prosser
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Tim Storr
- Department
of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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27
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Przyojski JA, Kiewit ML, Fillman KL, Arman HD, Tonzetich ZJ. Homoleptic transition metal complexes of the 7-azaindolide ligand featuring κ(1)-N1 coordination. Inorg Chem 2015; 54:9637-9645. [PMID: 26378471 DOI: 10.1021/acs.inorgchem.5b01732] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Homoleptic complexes of the anion of 7-azaindole (AzaIn) were synthesized and characterized for a series of 3d transition metals. For Mn(II), Fe(II), and Co(II), complexes of formula Na2[M(AzaIn)4]·2L (L = tetrahydrofuran (THF), 2-MeTHF, toluene, or benzene) were isolated by treatment of the corresponding metal chloride salts with 7-azaindole in the presence of sodium hexamethyldisilazide. The complexes adopt tetrahedral geometries with exclusive coordination to the transition metal ion through the pyrrolic N1 nitrogen atoms of the AzaIn ligands. Solid-state structures of the complexes demonstrate that the sodium cations remain tightly associated with the coordination entities through interaction with both the pyrrolic and pyridine nitrogen atoms of the azaindolide ligands. For Fe(II), replacement of the sodium cations by other alkali metal ions (Li or K) generates new complexes that demonstrate similar coordination geometries to the sodium salts. As a means of comparison, the Fe(II) complex of 4-azaindolide was also investigated. Na2[Fe(4-AzaIn)4]·2L adopts a similar solution structure to the 7-azaindolide complexes as judged by NMR spectroscopy and cyclic voltammetry. Density functional theory calculations were performed to investigate the bonding in the 7-azaindolide complexes. Results demonstrate that 7-azaindolide-κ(1)-N1 is a nearly pure sigma donor ligand that features a high degree of ionic character in its bonding to mid 3d transition metal ions.
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Affiliation(s)
- Jacob A Przyojski
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio, TX 78249
| | - Monica L Kiewit
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio, TX 78249
| | - Kathlyn L Fillman
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio, TX 78249.,Department of Chemistry, University of Rochester, Rochester, NY 14627
| | - Hadi D Arman
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio, TX 78249
| | - Zachary J Tonzetich
- Department of Chemistry, University of Texas at San Antonio (UTSA), San Antonio, TX 78249
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28
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Khan MS, Srivastava A, Chaurasiya R, Khan MS, Dua P. NH3 and PH3 adsorption through single walled ZnS nanotube: First principle insight. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.07.038] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Kumar A, Bheeter LP, Gangwar MK, Sortais JB, Darcel C, Ghosh P. Nickel complexes of 1,2,4-triazole derived amido-functionalized N-heterocyclic carbene ligands: Synthesis, theoretical studies and catalytic application. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.03.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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30
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Chiang L, Herasymchuk K, Thomas F, Storr T. Influence of Electron-Withdrawing Substituents on the Electronic Structure of Oxidized Ni and Cu Salen Complexes. Inorg Chem 2015; 54:5970-80. [DOI: 10.1021/acs.inorgchem.5b00783] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Linus Chiang
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Khrystyna Herasymchuk
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Fabrice Thomas
- Département de Chimie Moléculaire,
Chimie Inorganique Redox (CIRE), UMR-5250, Université Grenoble Alpes, BP 53, 38041 Grenoble
Cedex 9, France
| | - Tim Storr
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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31
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Domingo A, Angeli C, de Graaf C, Robert V. Electronic reorganization triggered by electron transfer: The intervalence charge transfer of a Fe3+/Fe2+bimetallic complex. J Comput Chem 2015; 36:861-9. [DOI: 10.1002/jcc.23871] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 12/17/2014] [Accepted: 01/15/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Alex Domingo
- Department of Chemistry; KU Leuven Celestijnenlaan 200F B-3001 Heverlee-Leuven Belgium
| | - Celestino Angeli
- Dipartimento di Scienze Chimiche e Farmaceutiche; Università di Ferrara; via Fossato di Mortara 17 44121 Ferrara Italy
| | - Coen de Graaf
- Departament de Química Física i Inorgànica; Universitat Rovira i Virgili; Marcel lí Domingo s/n 43007 Tarragona Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA); Passeig Lluís Companys 23 08010 Barcelona Spain
| | - Vincent Robert
- Laboratoire de Chimie Quantique; Institut de Chimie UMR 7177, Université de Strasbourg; 4 rue Blaise Pascal 67000 Strasbourg France
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32
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Fillman KL, Przyojski JA, Al-Afyouni MH, Tonzetich ZJ, Neidig ML. A combined magnetic circular dichroism and density functional theory approach for the elucidation of electronic structure and bonding in three- and four-coordinate iron(II)- N-heterocyclic carbene complexes. Chem Sci 2015; 6:1178-1188. [PMID: 25621143 PMCID: PMC4302958 DOI: 10.1039/c4sc02791d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 11/07/2014] [Indexed: 01/30/2023] Open
Abstract
The combination of iron salts and N-heterocyclic carbene (NHC) ligands is a highly effective combination in catalysis, with observed catalytic activities being highly dependent on the nature of the NHC ligand. Detailed spectroscopic and electronic structure studies have been performed on both three- and four-coordinate iron(II)-NHC complexes using a combined magnetic circular dichroism (MCD) and density functional theory (DFT) approach that provide detailed insight into the relative ligation properties of NHCs compared to traditional phosphine and amine ligands as well as the effects of NHC backbone structural variations on iron(II)-NHC bonding. Near-infrared MCD studies indicate that 10Dq(Td) for (NHC)2FeCl2 complexes is intermediate between those for comparable amine and phosphine complexes, demonstrating that such iron(II)-NHC and iron(II)-phosphine complexes are not simply analogues of one another. Theoretical studies including charge decomposition analysis indicate that the NHC ligands are slightly stronger donor ligands than phosphines but also result in significant weakening of the Fe-Cl bonds compared to phosphine and amine ligands. The net result is significant differences in the d orbital energies in four-coordinate (NHC)2FeCl2 complexes relative to the comparable phosphine complexes, where such electronic structure differences are likely a significant contributing factor to the differing catalytic performances observed with these ligands. Furthermore, Mössbauer, MCD and DFT studies of the effects of NHC backbone structure variations (i.e. saturated, unsaturated, chlorinated) on iron-NHC bonding and electronic structure in both three- and four-coordinate iron(II)-NHC complexes indicate only small differences as a function of backbone structure, that are likely amplified at lower oxidation states of iron due to the resulting decrease in the energy separation between the occupied iron d orbitals and the unoccupied NHC π* orbitals.
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Affiliation(s)
- Kathlyn L. Fillman
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - Jacob A. Przyojski
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , USA
| | - Malik H. Al-Afyouni
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
| | - Zachary J. Tonzetich
- Department of Chemistry , University of Texas at San Antonio , San Antonio , Texas 78249 , USA
| | - Michael L. Neidig
- Department of Chemistry , University of Rochester , Rochester , New York 14627 , USA .
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33
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Modak S, Gangwar MK, Nageswar Rao M, Madasu M, Kalita AC, Dorcet V, Shejale MA, Butcher RJ, Ghosh P. Fluoride-free Hiyama coupling by palladium abnormal N-heterocyclic carbene complexes. Dalton Trans 2015; 44:17617-28. [DOI: 10.1039/c5dt02317c] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Pd complexes of the 1,2,3-triazole based abnormal NHC ligands of the type (a-NHC)PdI2(L) [L = NC5H5 and PPh3] successfully catalyzed the fluoride-free Hiyama coupling in air.
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Affiliation(s)
- Sudipta Modak
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai 400 076
- India
| | - Manoj Kumar Gangwar
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai 400 076
- India
| | - Mitta Nageswar Rao
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai 400 076
- India
| | - Mahesh Madasu
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai 400 076
- India
| | - Alok Ch. Kalita
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai 400 076
- India
| | - Vincent Dorcet
- Université de Rennes 1
- Institut des Sciences chimiques de Rennes
- Campus de Beaulieu
- 35042 Rennes
- France
| | - Mayuri Arun Shejale
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai 400 076
- India
| | - Ray J. Butcher
- Department of Chemistry Howard University
- Washington DC 20059
- USA
| | - Prasenjit Ghosh
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- Mumbai 400 076
- India
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34
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Tong YP, Luo GT, Zhen J, Shen Y, Lin YW. Synthesis, structures, and theoretical investigation of three polyoxomolybdate-based compounds: self-assembly, fragment analysis, orbital interaction, and formation mechanism. CrystEngComm 2015. [DOI: 10.1039/c4ce02545h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three [Mo8O26]4− and [(SiO4)(Mo12O36)]4−-based polyoxoanion compounds were synthesized, together with fragment and orbital interaction analyses to explain the self-assembling mechanism of the polyoxoanions.
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Affiliation(s)
- Yi-Ping Tong
- Department of Chemical Engineering
- Huizhou University
- Huizhou 516007, China
| | - Guo-Tian Luo
- College of Chemistry and Life Science
- Gannan Normal University
- Ganzhou 341000, China
| | - Jin Zhen
- Department of Chemical Engineering
- Huizhou University
- Huizhou 516007, China
| | - You Shen
- Department of Chemical Engineering
- Huizhou University
- Huizhou 516007, China
| | - Yan-Wen Lin
- Department of Life Science
- Huizhou University
- Huizhou 516007, China
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35
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Paredes-Gil K, Jaque P. Initiation stage of alkene metathesis: Insights from natural bond orbital and charge decomposition analyses. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2014.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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36
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Chiang L, Allan LEN, Alcantara J, Wang MCP, Storr T, Shaver MP. Tuning ligand electronics and peripheral substitution on cobalt salen complexes: structure and polymerisation activity. Dalton Trans 2014; 43:4295-304. [PMID: 24048446 DOI: 10.1039/c3dt51846a] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A series of cobalt salen complexes, where salen represents an N2O2 bis-Schiff-base bis-phenolate framework, are prepared, characterised and investigated for reversible-termination organometallic mediated radical polymerisation (RT-OMRP). The salen ligands contain a cyclohexane diimine bridge and systematically altered para-substituted phenoxide moieties as a method to examine the electronic impact of the ligand on complex structure and reactivity. The complexes are characterised by single crystal X-ray diffraction, cyclic voltammetry, X-ray photoelectron spectroscopy, electron paramagnetic resonance spectroscopy and computational methods. Structural studies all support a tailorable metal centre reactivity altered by the electron-donating ability of the salen ligand. RT-OMRP of styrene, methyl methacrylate and vinyl acetate is reported and suggests that cobalt-carbon bond strength varies with the ligand substitution. Competing β-hydrogen abstraction affords long-chain olefin-terminated polymer chains and well controlled vinyl acetate polymerisations, contrasting with the lower temperature associative exchange mechanism of degenerative transfer OMRP.
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Affiliation(s)
- Linus Chiang
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.
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37
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Góra-Marek K, Stępniewski A, Radoń M, Broclawik E. Ammonia-modified Co(II) sites in zeolites: IR spectroscopy and spin-resolved charge transfer analysis of NO adsorption complexes. Phys Chem Chem Phys 2014; 16:24089-98. [PMID: 25245279 DOI: 10.1039/c4cp03350g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
IR spectroscopic studies and quantum chemical modeling (aided by the analysis of charge transfer processes between co-adsorbed ammonia and the Co(II)-NO adduct) evidence that donor ammonia molecules, ligated to extraframework Co(2+) centers in zeolites, vitally affect the strength of the N-O bond. Calculations indicate that versatility of ammine nitrosyl complexes, differing in the number of NH3 ligands as well as in the geometry and electronic structure of the Co-N-O unit (showing variable activation of NO) may co-exist in zeolite frameworks. However, only combined analysis of experimental and calculation results points to the adducts with three or five NH3 coligands as decisive. The novel finding concerning the interpretation of discussed IR spectra is the assignment of the most down-shifted bands at 1600-1615 cm(-1) to the N-O stretch in the singlet [Co(NH3)3(NO)](2+) adduct, in place of tentative ascription to pentaammine adducts. Theory indicates also that the Co(ii) center (with manifold of close-lying electronic and spin states) acts as a tunable electron donor where the spin state may open or close specific channels transferring electron density from the donor ligands (treated as the part of environment) to the NO molecule.
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Affiliation(s)
- Kinga Góra-Marek
- Faculty of Chemistry, Jagiellonian University in Kraków, Ingardena 3, 30-060 Krakow, Poland.
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38
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Liu XJ, Hamilton I. Adsorption of small molecules on helical gold nanorods: A relativistic density functional study. J Comput Chem 2014; 35:1967-76. [DOI: 10.1002/jcc.23711] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 07/11/2014] [Accepted: 07/25/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Xiao-Jing Liu
- Department of Chemistry; Wilfrid Laurier University; Waterloo Ontario Canada N2L3C5
| | - Ian Hamilton
- Department of Chemistry; Wilfrid Laurier University; Waterloo Ontario Canada N2L3C5
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39
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Identification of the transition state for fast reactions: The trapping of hydroxyl and methyl radicals by DMPO—A DFT approach. J Mol Graph Model 2014; 52:57-70. [DOI: 10.1016/j.jmgm.2014.06.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 06/02/2014] [Accepted: 06/17/2014] [Indexed: 11/20/2022]
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40
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Lecarme L, Chiang L, Philouze C, Jarjayes O, Storr T, Thomas F. Detailed Geometric and Electronic Structures of a One-Electron-Oxidized Ni Salophen Complex and Its Amido Derivatives. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402265] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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41
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Chiang L, Savard D, Shimazaki Y, Thomas F, Storr T. FeIII Bipyrrolidine Phenoxide Complexes and Their Oxidized Analogues. Inorg Chem 2014; 53:5810-9. [DOI: 10.1021/ic500663x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Linus Chiang
- Department of Chemistry, Simon Fraser University , Burnaby, British Columbia V5A 1S6, Canada
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42
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John A, Modak S, Madasu M, Katari M, Ghosh P. Palladium complexes of the N-fused heterocycle derived abnormal N-heterocyclic carbenes for the much-preferred Cu-free and the amine-free Sonogashira coupling in air. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.01.062] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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43
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Synthesis, characterization, and biological studies of emissive rhenium–glutamine conjugates. J Biol Inorg Chem 2013; 18:831-44. [DOI: 10.1007/s00775-013-1023-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 07/03/2013] [Indexed: 12/23/2022]
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44
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Dunn TJ, Chiang L, Ramogida CF, Hazin K, Webb MI, Katz MJ, Storr T. Class III Delocalization and Exciton Coupling in a Bimetallic Bis-ligand Radical Complex. Chemistry 2013; 19:9606-18. [DOI: 10.1002/chem.201300798] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Indexed: 11/07/2022]
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45
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Koutsouri E, Zarkadoulas A, Makedonas C, Koumbounis C, Paraskevopoulou P, Mitsopoulou CA. Combining photosensitizers: The case of [Cl2Pt(bpym)Re(CO)3Cl] and its dithiolate analogs. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.09.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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46
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Kumar A, Katari M, Ghosh P. Understanding the lability of a trans bound pyridine ligand in a saturated six-membered N-heterocyclic carbene based (NHC)PdCl2(pyridine) type complex: A case study. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.08.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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47
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Le Roy JJ, Jeletic M, Gorelsky SI, Korobkov I, Ungur L, Chibotaru LF, Murugesu M. An Organometallic Building Block Approach To Produce a Multidecker 4f Single-Molecule Magnet. J Am Chem Soc 2013; 135:3502-10. [DOI: 10.1021/ja310642h] [Citation(s) in RCA: 176] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jennifer J. Le Roy
- Chemistry Department and the
Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5,
Canada
| | - Matthew Jeletic
- Chemistry Department and the
Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5,
Canada
| | - Serge I. Gorelsky
- Chemistry Department and the
Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5,
Canada
| | - Ilia Korobkov
- Chemistry Department and the
Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5,
Canada
| | - Liviu Ungur
- Division of Quantum
and Physical
Chemistry and INPAC Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan, 200F,
3001, Belgium
| | - Liviu F. Chibotaru
- Division of Quantum
and Physical
Chemistry and INPAC Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan, 200F,
3001, Belgium
| | - Muralee Murugesu
- Chemistry Department and the
Centre for Catalysis Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5,
Canada
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48
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Dunn TJ, Webb MI, Hazin K, Verma P, Wasinger EC, Shimazaki Y, Storr T. Double oxidation localizes spin in a Ni bis-phenoxyl radical complex. Dalton Trans 2013; 42:3950-6. [DOI: 10.1039/c2dt32632a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Balaghi SE, Safaei E, Chiang L, Wong EWY, Savard D, Clarke RM, Storr T. Synthesis, characterization and catalytic activity of copper(ii) complexes containing a redox-active benzoxazole iminosemiquinone ligand. Dalton Trans 2013; 42:6829-39. [DOI: 10.1039/c3dt00004d] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Asami K, Tsukidate K, Iwatsuki S, Tani F, Karasawa S, Chiang L, Storr T, Thomas F, Shimazaki Y. New Insights into the Electronic Structure and Reactivity of One-Electron Oxidized Copper(II)-(Disalicylidene)diamine Complexes. Inorg Chem 2012; 51:12450-61. [DOI: 10.1021/ic3018503] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Kazutaka Asami
- College of Science, Ibaraki University, Bunkyo, Mito 310-8512, Japan
| | - Kazuaki Tsukidate
- College of Science, Ibaraki University, Bunkyo, Mito 310-8512, Japan
| | - Satoshi Iwatsuki
- Department of Chemistry, Konan University, Higashinada-ku, Kobe 658-8501, Japan
| | - Fumito Tani
- Institute for Materials Chemistry
and Engineering, Kyushu University, Higashi-ku,
Fukuoka 812-8581, Japan
| | - Satoru Karasawa
- Graduate School of Pharmaceutical
Sciences, Kyushu University, Higashi-ku,
Fukuoka 812-8582, Japan
| | - Linus Chiang
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia,
Canada
| | - Tim Storr
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia,
Canada
| | - Fabrice Thomas
- Département
de Chimie
Moléculaire-Chimie Inorganique Redox Biomimétique (CIRE)
- UMR CNRS 5250, Université Joseph Fourier, B. P. 53, 38041 Grenoble cedex 9, France
| | - Yuichi Shimazaki
- College of Science, Ibaraki University, Bunkyo, Mito 310-8512, Japan
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