1
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Macedi E, Giorgi L, Formica M, Rossi P, Paderni D, Paoli P, Fusi V. A Tetranuclear Copper(II)/Calcium(II) Complex as Dual Chemosensor for Colorimetric and Fluorescent Detection of Non-Steroidal Anti-Inflammatory Drugs. Chempluschem 2023; 88:e202200364. [PMID: 36658696 DOI: 10.1002/cplu.202200364] [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: 10/18/2022] [Revised: 01/04/2023] [Indexed: 01/06/2023]
Abstract
The tetranuclear Cu2+ /Ca2+ /Ca2+ /Cu2+ complex based on Malten ligand has been investigated as a platform for anion binding. Simple organic carboxylates and non-steroidal anti-inflammatory drugs (NSAIDs) have been tested, revealing the ability of the platform to bind them. The receiving platform hosts at least two guests in solution although a third anion can be bound, as suggested by X-ray diffraction analysis. The addition of the anions is accompanied by a color change of the solution, making the system a colorimetric sensor for carboxylates (LOD values comprised between 3.6 and 20.7 ppm). A fluorescent system consisting of the 2-(3-oxido-6-oxoxanthen-9-yl)benzoate (fluorescein anion) linked to the tetranuclear platform has been also prepared and used in a chemosensing ensemble approach to signal the presence of the selected anions (Log K between 2.6 and 5.6 for the addition of two guests). The latter also works in a paper strip test, offering the chemosensor a possible practical application.
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Affiliation(s)
- Eleonora Macedi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
| | - Luca Giorgi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
| | - Mauro Formica
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
| | - Patrizia Rossi
- Department of Industrial Engineering, University of Florence, via S. Marta 3, 50139, Florence, Italy
| | - Daniele Paderni
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
| | - Paola Paoli
- Department of Industrial Engineering, University of Florence, via S. Marta 3, 50139, Florence, Italy
| | - Vieri Fusi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
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2
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Paderni D, Lopez D, Macedi E, Ambrosi G, Ricci A, Palazzetti E, Giorgi L, Formica M, Fusi V. Solvent induced selective response to metal ions of three HNBO-based chemosensors. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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3
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Paderni D, Macedi E, Lvova L, Ambrosi G, Formica M, Giorgi L, Paolesse R, Fusi V. Selective Detection of Mg
2+
for Sensing Applications in Drinking Water. Chemistry 2022; 28:e202201062. [PMID: 35622380 PMCID: PMC9542287 DOI: 10.1002/chem.202201062] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Indexed: 11/12/2022]
Abstract
A new series of ligands containing the 2‐(2‐hydroxy‐3‐ naphthyl)‐4‐methylbenzoxazole (HNBO) fluorophore showed selectivity for Mg2+ ions, without the interference of Ca2+. The most promising representative L3 resulted the best performing sensor for Mg2+ both in solution and embedded in an all‐solid‐state optode, especially towards real samples of drinkable water.
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Affiliation(s)
- Daniele Paderni
- Department of Pure and Applied Sciences University of Urbino “Carlo Bo” Via della Stazione 4 I-61029 Urbino Italy
| | - Eleonora Macedi
- Department of Pure and Applied Sciences University of Urbino “Carlo Bo” Via della Stazione 4 I-61029 Urbino Italy
| | - Larisa Lvova
- Department of Chemical Sciences and Technology University of Rome “Tor Vergata” Via della Ricerca Scientifica 1 I-00133 Roma Italy
| | - Gianluca Ambrosi
- Department of Pure and Applied Sciences University of Urbino “Carlo Bo” Via della Stazione 4 I-61029 Urbino Italy
| | - Mauro Formica
- Department of Pure and Applied Sciences University of Urbino “Carlo Bo” Via della Stazione 4 I-61029 Urbino Italy
| | - Luca Giorgi
- Department of Pure and Applied Sciences University of Urbino “Carlo Bo” Via della Stazione 4 I-61029 Urbino Italy
| | - Roberto Paolesse
- Department of Chemical Sciences and Technology University of Rome “Tor Vergata” Via della Ricerca Scientifica 1 I-00133 Roma Italy
| | - Vieri Fusi
- Department of Pure and Applied Sciences University of Urbino “Carlo Bo” Via della Stazione 4 I-61029 Urbino Italy
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4
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Paderni D, Giorgi L, Macedi E, Formica M, Paoli P, Rossi P, Fusi V. A selective fluorescent probe for gadolinium III in water based on a Pd II-preorganized chromone-receptor. Dalton Trans 2021; 50:15433-15440. [PMID: 34664572 DOI: 10.1039/d1dt01753e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, solution studies, photochemical properties and the X-ray structure of a chromone based fluorescent PdII complex are reported. The ligand contains two chromone units linked as side arms to an ethylenediamine moiety; in the PdII complex the metal ion preorganizes the two hydroxychromone units forming a rigid structure with a negatively charged pocket formed by four oxygen atoms that is able to interact with hard metal cations, such as ions, giving rise to stable bimetallic complexes. Upon interaction with LaIII and GdIII, in particular, the emission intensity at 423 nm increases by a factor of 2 and 8, respectively, while the other rare earth ions quench the fluorescence. Spectrofluorimetric studies on real matrices showed the possibility to use this system as a selective fluorescence probe to detect and trace the presence of Gadolinium in environmental water acting as an OFF-ON chemosensor, with a LOD of 0.4 ppm and a LOQ of 1.2 ppm.
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Affiliation(s)
- Daniele Paderni
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", via della Stazione 4, 61029 Urbino, Italy.
| | - Luca Giorgi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", via della Stazione 4, 61029 Urbino, Italy.
| | - Eleonora Macedi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", via della Stazione 4, 61029 Urbino, Italy.
| | - Mauro Formica
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", via della Stazione 4, 61029 Urbino, Italy.
| | - Paola Paoli
- Department of Industrial Engineering, University of Florence, via S. Marta 3, 50139 Florence, Italy
| | - Patrizia Rossi
- Department of Industrial Engineering, University of Florence, via S. Marta 3, 50139 Florence, Italy
| | - Vieri Fusi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", via della Stazione 4, 61029 Urbino, Italy.
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5
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Paderni D, Giorgi L, Fusi V, Formica M, Ambrosi G, Micheloni M. Chemical sensors for rare earth metal ions. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213639] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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6
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Giorgi L, Ambrosi G, Paderni D, Conti L, Amatori S, Romagnoli F, Rossi P, Formica M, Macedi E, Giorgi C, Paoli P, Fanelli M, Fusi V. Bis-maltol-polyamine family: structural modifications at strategic positions. Synthesis, coordination and antineoplastic activity of two new ligands. NEW J CHEM 2021. [DOI: 10.1039/d0nj05327a] [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
Substitution at the maltol C6 position affects the antineoplastic and coordination properties of Malten, acting on degradation time, binding ability and biological activity.
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Affiliation(s)
- Luca Giorgi
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Gianluca Ambrosi
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Daniele Paderni
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Luca Conti
- Department of Chemistry “Ugo Schiff”, University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - Stefano Amatori
- Department of Biomolecular Sciences, Molecular Pathology Laboratory “PaoLa” University of Urbino “Carlo Bo”
- 61032 Fano
- Italy
| | - Francesca Romagnoli
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Patrizia Rossi
- Department of Industrial Engineering, University of Florence
- 50139 Florence
- Italy
| | - Mauro Formica
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Eleonora Macedi
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
| | - Claudia Giorgi
- Department of Chemistry “Ugo Schiff”, University of Florence
- 50019 Sesto Fiorentino
- Italy
| | - Paola Paoli
- Department of Industrial Engineering, University of Florence
- 50139 Florence
- Italy
| | - Mirco Fanelli
- Department of Biomolecular Sciences, Molecular Pathology Laboratory “PaoLa” University of Urbino “Carlo Bo”
- 61032 Fano
- Italy
| | - Vieri Fusi
- Dipartimento di Scienze Pure e Applicate, Università degli Studi di Urbino “Carlo Bo”
- I-61029 Urbino
- Italy
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7
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Rossi P, Macedi E, Formica M, Giorgi L, Paoli P, Fusi V. Hetero-Tetranuclear Cu 2+ /Ca 2+ /Ca 2+ /Cu 2+ Architectures Based On Malten Ligand: Scaffold for Anion Binding. Chempluschem 2020; 85:1179-1189. [PMID: 32500597 DOI: 10.1002/cplu.202000307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/14/2020] [Indexed: 01/05/2023]
Abstract
The hetero-tetranuclear Cu2+ /Ca2+ /Ca2+ /Cu2+ complex obtained with the N,N'-bis((3-hydroxy-4-pyron-2-yl)methyl)-N,N'-dimethylethylendiamine (Malten) ligand has been studied in solid and solution states as scaffold to bind anions. Three crystal structures showing the same metal ions sequence have been examined; they display a tetracharged complex cation neutralized by four monocharged anions. The anions play two different roles: as coordinated (two ClO4 - , Cl- or NO3 - ) or ancillary (two ClO4 - ) guests. The tetranuclear scaffold hosts two anions also in aqueous and ethanol solutions. Spectrophotometric studies in ethanol allowed to determine the addition constant values for Cl- and Br- (Log K1-2 =4.43(4), 4.39(3) for Cl- , 3.80(3), 3.54(2) for Br- ) while the others, although bound, showed lower affinity for the scaffold. Both the crystals and the solutions change their color depending on the added anion, namely pink, dark green or blue in the presence of ClO4 - , Cl- or NO3 - , respectively, thus the presence of the different anions is visible to the naked eye. The hetero-tetranuclear Cu2+ /Ca2+ /Ca2+ /Cu2+ complex is a versatile architecture to be used as scaffold for anion binding.
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Affiliation(s)
- Patrizia Rossi
- Department of Industrial Engineering, University of Florence, Via S. Marta 3, 50139, Florence, Italy
| | - Eleonora Macedi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
| | - Mauro Formica
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
| | - Luca Giorgi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
| | - Paola Paoli
- Department of Industrial Engineering, University of Florence, Via S. Marta 3, 50139, Florence, Italy
| | - Vieri Fusi
- Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029, Urbino, Italy
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8
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Ambrosi G, Fanelli M, Paoli P, Formica M, Paderni D, Rossi P, Micheloni M, Giorgi L, Fusi V. Zn(ii) detection and biological activity of a macrocycle containing a bis(oxadiazole)pyridine derivative as fluorophore. Dalton Trans 2020; 49:7496-7506. [PMID: 32441717 DOI: 10.1039/c9dt03910d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The synthesis, photochemical properties, biological effects and the X-ray crystal structure of a fluorescent polyamine macrocycle L are reported. L is a polyamine cyclophane macrocycle in which 2,6-bis(5-(2-methylphenyl)-1,3,4-oxadiazol-2-yl)pyridine (POXAPy) acts as a fluorescent sensor and the polyamine as a metal ion binding unit. L performs as a PET-mediated chemosensor, with a maximum emission wavelength close to 360 nm. This gives rise to a signal that is visible to the naked eye in the blue visible range. L is able to detect the Zn(ii) and Cd(ii) metal ions in an aqueous solution at pH = 7, with the coordination of the ions switching the emission ON through a CHEF effect. In contrast, paramagnetic metal ions like Cu(ii) and Ni(ii) completely quench the already low emission of L at this pH value. L affects the cell survival of a leukemic cellular model (U937) at micromolar concentrations with cell death starting after only 24 h of exposure; starting from a final concentration of 5 μM, L almost completely abrogates the survival of the leukemic cells over 72 h, with a mechanism that is compatible with a genomic DNA interaction.
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Affiliation(s)
- Gianluca Ambrosi
- Department of Pure and Applied Sciences, University of Urbino, Via della Stazione 4, I-61029 Urbino, PU, Italy.
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9
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Macedi E, Paderni D, Formica M, Conti L, Fanelli M, Giorgi L, Amatori S, Ambrosi G, Valtancoli B, Fusi V. Playing with Structural Parameters: Synthesis and Characterization of Two New Maltol-Based Ligands with Binding and Antineoplastic Properties. Molecules 2020; 25:molecules25040943. [PMID: 32093219 PMCID: PMC7070877 DOI: 10.3390/molecules25040943] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/11/2020] [Accepted: 02/14/2020] [Indexed: 11/30/2022] Open
Abstract
Two maltol-based ligands, N,N′-bis((3-hydroxy-4-pyron-2-yl)methyl)-1,4-piperazine (L1) and N,N′,N′-tris((3-hydroxy-4-pyron-2-yl)methyl)-N-methylethylendiamine (L2), were synthesized and characterized. L1 and L2, containing, respectively, two and three maltol units spaced by a diamine fragment, were designed to evaluate how biological and binding features are affected by structural modifications of the parent compound malten. The acid-base behavior and the binding properties towards transition, alkaline-earth (AE) and rare-earth (RE) cations in aqueous solution, studied by potentiometric, UV-Vis and NMR analysis, are reported along with biological studies on DNA and leukemia cells. Both ligands form stable complexes with Cu(II), Zn(II) and Co(II) that were studied as metallo-receptors for AE and RE at neutral pH. L1 complexes are more affected than L2 ones by hard cations, the L1-Cu(II) system being deeply affected by RE. The structural modifications altered the mechanism of action: L1 partially maintains the ability to induce structural alterations of DNA, while L2 provokes single strand (nicks) and to a lesser extent double strand breaks of DNA.
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Affiliation(s)
- Eleonora Macedi
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, via della Stazione 4, 61029 Urbino, Italy; (D.P.); (M.F.); (L.G.); (G.A.)
- Correspondence: (E.M.); (V.F.); Tel.: +39-0722-305-905 (E.M.)
| | - Daniele Paderni
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, via della Stazione 4, 61029 Urbino, Italy; (D.P.); (M.F.); (L.G.); (G.A.)
| | - Mauro Formica
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, via della Stazione 4, 61029 Urbino, Italy; (D.P.); (M.F.); (L.G.); (G.A.)
| | - Luca Conti
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy; (L.C.); (B.V.)
| | - Mirco Fanelli
- Department of Biomolecular Sciences, Molecular Pathology Laboratory “PaoLa”, University of Urbino “Carlo Bo”, via Arco d’Augusto 2, 61032 Fano, Italy; (M.F.); (S.A.)
| | - Luca Giorgi
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, via della Stazione 4, 61029 Urbino, Italy; (D.P.); (M.F.); (L.G.); (G.A.)
| | - Stefano Amatori
- Department of Biomolecular Sciences, Molecular Pathology Laboratory “PaoLa”, University of Urbino “Carlo Bo”, via Arco d’Augusto 2, 61032 Fano, Italy; (M.F.); (S.A.)
| | - Gianluca Ambrosi
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, via della Stazione 4, 61029 Urbino, Italy; (D.P.); (M.F.); (L.G.); (G.A.)
| | - Barbara Valtancoli
- Department of Chemistry “Ugo Schiff”, University of Florence, via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy; (L.C.); (B.V.)
| | - Vieri Fusi
- Department of Pure and Applied Sciences, University of Urbino “Carlo Bo”, via della Stazione 4, 61029 Urbino, Italy; (D.P.); (M.F.); (L.G.); (G.A.)
- Correspondence: (E.M.); (V.F.); Tel.: +39-0722-305-905 (E.M.)
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10
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Pandey R, Kumar A, Xu Q, Pandey DS. Zinc(ii), copper(ii) and cadmium(ii) complexes as fluorescent chemosensors for cations. Dalton Trans 2020; 49:542-568. [PMID: 31894793 DOI: 10.1039/c9dt03017d] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fluorescence chemosensing behavior of Zn(ii), Cu(ii), and Cd(ii) based complexes toward cations has been described. Cation detection via conventional mechanisms, metal-metal exchange and chemodosimetric approaches along with the importance of metal ions and the scope, significance, and challenges with regard to the detection of cations by metal complex based probes will be discussed in detail. The fundamentals of photophysical behavior and mechanisms involved in the fluorescence detection of analytes will also be described. This article provides a detailed overview of Zn(ii), Cu(ii), and Cd(ii) based complexes as fluorescent probes for cations, together with essential discussions pertaining to detection mechanisms.
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Affiliation(s)
- Rampal Pandey
- Department of Chemistry, National Institute of Technology Uttarakhand, Srinagar, Garhwal 246174, India
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11
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You MH, Li MH, Li HH, Chen Y, Lin MJ. The impact of metal cations on the photochemical properties of hybrid heterostructures with infinite alkaline-earth metal oxide clusters. Dalton Trans 2019; 48:17381-17387. [DOI: 10.1039/c9dt04104d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Two hybrid heterostructures with infinite alkaline-earth metal oxide clusters exhibited diametrically opposite photochromic sensitivities and photocatalytic activities, which are mainly related to the HOMO levels of inorganic clusters.
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Affiliation(s)
- Ming-Hua You
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- China
| | - Meng-Hua Li
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- China
| | - Hao-Hong Li
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- China
| | - Yong Chen
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- China
| | - Mei-Jin Lin
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- China
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12
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Thakur N, Pandey MD, Pandey R. A uniquely fabricated Cu(ii)-metallacycle as a reusable highly sensitive dual-channel and practically functional metalloreceptor for Fe3+ and Ca2+ ions: an inorganic site of cation detection. NEW J CHEM 2018. [DOI: 10.1039/c7nj03294c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dimeric Cu(ii)-complex developed from disulfane ligand, serves as dual-channel metalloreceptor for Fe3+/Ca2+ and detection of Fe3+ in real water samples.
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Affiliation(s)
- Neha Thakur
- Department of Chemistry
- Dr. Harisingh Gour Central University
- Sagar
- India
| | | | - Rampal Pandey
- Department of Chemistry
- Dr. Harisingh Gour Central University
- Sagar
- India
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13
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Rossi P, Ciattini S, Formica M, Fusi V, Giorgi L, Macedi E, Micheloni M, Paoli P. 3d-4f-3d trinuclear complexes with di-maltol-polyamine ligands. Solid state structure and solution behaviour. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.06.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Sorenson S, Popova M, Arif AM, Berreau LM. A bipyridine-ligated zinc(II) complex with bridging flavonolate ligation: synthesis, characterization, and visible-light-induced CO release reactivity. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2017; 73:703-709. [PMID: 28872068 DOI: 10.1107/s2053229617011366] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 08/02/2017] [Indexed: 12/14/2022]
Abstract
Metal-flavonolate compounds are of significant current interest as synthetic models for quercetinase enzymes and as bioactive compounds of importance to human health. Zinc-3-hydroxyflavonolate compounds, including those of quercetin, kampferol, and morin, generally exhibit bidentate coordination to a single ZnII center. The bipyridine-ligated zinc-flavonolate compound reported herein, namely bis(μ-4-oxo-2-phenyl-4H-chromen-3-olato)-κ3O3:O3,O4;κ3O3,O4:O3-bis[(2,2'-bipyridine-κ2N,N')zinc(II)] bis(perchlorate), {[Zn2(C15H9O3)2(C10H8N2)2](ClO4)2}n, (1), provides an unusual example of bridging 3-hydroxyflavonolate ligation in a dinuclear metal complex. The symmetry-related ZnII centers of (1) exhibit a distorted octahedral geometry, with weak coordination of a perchlorate anion trans to the bridging deprotonated O atom of the flavonolate ligand. Variable-concentration conductivity measurements provide evidence that, when (1) is dissolved in CH3CN, the complex dissociates into monomers. 1H NMR resonances for (1) dissolved in d6-DMSO were assigned via HMQC to the H atoms of the flavonolate and bipyridine ligands. In CH3CN, (1) undergoes quantitative visible-light-induced CO release with a quantum yield [0.004 (1)] similar to that exhibited by other mononuclear zinc-3-hydroxyflavonolate complexes. Mass spectroscopic identification of the [(bpy)2Zn(O-benzoylsalicylate)]+ ion provides evidence of CO release from the flavonol and of ligand exchange at the ZnII center.
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Affiliation(s)
- Shayne Sorenson
- Department of Chemistry & Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322-0300, USA
| | - Marina Popova
- Department of Chemistry & Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322-0300, USA
| | - Atta M Arif
- Department of Chemistry, University of Utah, 315 S. 1400 E., Rm 1170, Salt Lake City, UT 84112-0850, USA
| | - Lisa M Berreau
- Department of Chemistry & Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322-0300, USA
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15
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Ambrosi G, Formica M, Fusi V, Giorgi L, Macedi E, Micheloni M, Paoli P, Rossi P. A Biphenol-Based Chemosensor for Zn(II) and Cd(II) Metal Ions: Synthesis, Potentiometric Studies, and Crystal Structures. Inorg Chem 2016; 55:7676-87. [PMID: 27439670 DOI: 10.1021/acs.inorgchem.6b01145] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We synthesized and characterized the ligand N,N'-bis[(2,2'-dihydroxybiphen-3-yl)methyl]-N,N'-dimethylethylenediamine (L), which contains two biphenol moieties linked as side arms to an N,N'-dimethylethylenediamine scaffold. The ligand is highly soluble in a 50/50 (v/v) water/ethanol mixture and, in its deprotonated form H-2L(2-), is able to coordinate transition-metal ions such as Ni(II), Zn(II), Cu(II), Cd(II), and Pd(II). The crystal structures of [Ni(H-2L)·2n-BuOH], [Ni(H-2L)·2MeOH], [Cd(H-2L)·2DMF], [Cu(H-2L)(DMF)], and [Pd(H-2L)(DMF)] were also determined and described. Potentiometric titrations were carried out in a mixed solvent with Zn(II), Cu(II), and Ni(II) metal ions to determine the acid-base and stability constants. L was highly fluorescent in the visible range (400 nm). Moreover, its emission intensity increased upon the addition of Zn(II) or Cd(II) ions in an ethanol/water solution and behaved as a chemosensor for the presence of these ions in the solution.
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Affiliation(s)
- Gianluca Ambrosi
- Department of Pure and Applied Sciences, University of Urbino , Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Mauro Formica
- Department of Pure and Applied Sciences, University of Urbino , Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Vieri Fusi
- Department of Pure and Applied Sciences, University of Urbino , Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Luca Giorgi
- Department of Pure and Applied Sciences, University of Urbino , Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Eleonora Macedi
- Department of Chemistry and Biology, University of Salerno , via Giovanni Paolo II 132, I-84084 Fisciano, Italy
| | - Mauro Micheloni
- Department of Pure and Applied Sciences, University of Urbino , Piazza Rinascimento 6, I-61029 Urbino, Italy
| | - Paola Paoli
- Department of Industrial Engineering, University of Florence , via S. Marta 3, I-50139 Florence, Italy
| | - Patrizia Rossi
- Department of Industrial Engineering, University of Florence , via S. Marta 3, I-50139 Florence, Italy
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