1
|
Guo X, Zhang L, Hu J, Szilágyi B, Yu M, Chen S, Tircsó G, Zhou X, Tao J. Improving the potential of paraCEST through magnetic-coupling induced line sharpening. Chem Sci 2023; 14:14157-14165. [PMID: 38098703 PMCID: PMC10717539 DOI: 10.1039/d3sc04770a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 11/17/2023] [Indexed: 12/17/2023] Open
Abstract
Magnetic coupling between paramagnetic centers is a crucial phenomenon in the design of efficient MRI contrast agents. In this study, we investigate the paraCEST properties and magnetic coupling effects of a novel homodinuclear Ni(ii) complex, 1, containing a Robson type macrocyclic ligand. A thorough analysis of the complex's electronic and magnetic properties revealed that the magnetic coupling effect reduces the transverse relaxation rate and enhances the sharpness of the proton resonances, leading to enhanced CEST efficiency. This novel mechanism, which we coined "magnetic-coupling induced line sharpening" (MILS), can be crucial for optimizing the performance of paramagnetic metal complexes in paraCEST imaging. Moreover, magnetic coupling plays a critical role in the relaxation properties of homodinuclear complexes. Our study not only paves the way for the creation of advanced paraCEST agents with enhanced CEST capabilities and sensitivity but also provides valuable guidance for the design of other MRI contrast agents utilizing dinuclear metal complexes.
Collapse
Affiliation(s)
- Xin Guo
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology Beijing 102488 China
| | - Lei Zhang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics Wuhan 430071 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jiesheng Hu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology Beijing 102488 China
| | - Balázs Szilágyi
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen Egyetem tér 1 H-4032 Debrecen Hungary
- Doctoral School of Chemistry, University of Debrecen Egyetem tér 1 H-4032 Debrecen Hungary
| | - Meng Yu
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology Beijing 102488 China
| | - Shizhen Chen
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics Wuhan 430071 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen Egyetem tér 1 H-4032 Debrecen Hungary
| | - Xin Zhou
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics Wuhan 430071 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jun Tao
- Key Laboratory of Cluster Science of Ministry of Education, School of Chemistry and Chemical Engineering, Liangxiang Campus, Beijing Institute of Technology Beijing 102488 China
| |
Collapse
|
2
|
Huang M, Cui P, Zhou J, Liu C, Wang Y. Theoretical study on the inhibition mechanisms of heavy metal ions on urease activity. CHEMOSPHERE 2023; 345:140416. [PMID: 37827462 DOI: 10.1016/j.chemosphere.2023.140416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 10/08/2023] [Accepted: 10/09/2023] [Indexed: 10/14/2023]
Abstract
Soil urease is highly sensitive to soil heavy metal pollution, and thus its activity can be used as bio-indicator of soil health. However, little is known about the inhibition mechanisms of heavy metals on urease. The effects of dimetallic substitution (i.e., Cd, Co, Cu, Hg, and Zn) on the binding of urea in the urease and its subsequent decomposition were studied using quantum chemical methodologies with a urease mimic (phthalazine-dinickel complex). The dimetallic substitution altered the structural features of the dimetal complexes and the M-O bond length between the dimetals and the carbonyl-O of coordinated urea molecules, weakening the binding energies of urea in dimetal complexes, which further affected the transformation of urea. In the urea decomposition via intra-molecular proton transfer, all dimetal complexes have a high activation barrier due to the weak binding of urea in complexes and hydrogen bonding within urea molecules, which are therefore difficult to occur spontaneously. In the urea decomposition via water-assisted inter-molecular proton transfer, the addition of water molecules decreased the energy barrier of urea decomposition. Regardless of the urea decomposition pathway, the dimetallic substitution altered the M-O bond length and hydrogen bond pattern of intermediates and transition states, and also affected the leave of the resulting NH3 from the dimetal complexes by regulating the C-N bond length within the decomposed urea molecule. Overall, the theoretical study provided insight into the molecular mechanisms of the inhibitory effects of heavy metals on urease activity.
Collapse
Affiliation(s)
- Meiying Huang
- State Key Laboratory of Soil & Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Peixin Cui
- State Key Laboratory of Soil & Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Jing Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Cun Liu
- State Key Laboratory of Soil & Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
| | - Yujun Wang
- State Key Laboratory of Soil & Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|
3
|
Patra A, Carrella LM, Vojtíšek P, Rentschler E, Manna SC. Opposing magnetic communications in two dinuclear Ni(II) complexes: Ferromagnetic Ni-N-Ni and antiferromagnetic Ni-O-Ni moiety. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
4
|
Derafa W, Aggoun D, Messasma Z, Houchi S, Bouacida S, Ourari A. An unexpected single crystal structure of nickel(II) complex: Spectral, DFT, NLO, magnetic and molecular docking studies. J Mol Struct 2022; 1264:133190. [PMID: 35531369 PMCID: PMC9055260 DOI: 10.1016/j.molstruc.2022.133190] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 04/23/2022] [Accepted: 04/28/2022] [Indexed: 01/11/2023]
Abstract
This work explores the study of a synthesized nickel complex as a possible inhibitor against the main protease (Mpro) of the recent emerging coronavirus disease (COVID-19). Overall, the template reaction of 3-acetyl-2-hydroxy-6-methyl-4H-pyran-4-one with nickel(II) chloride hexahydrate in N,N-dimethylformamide (DMF) medium leads to the formation of neutral nickel complex. This resulting complex is formulated as [Ni(DHA)2(DMF)2] on the basis of FT-IR, UV-Vis., single-crystal X-ray diffraction analysis, magnetic susceptibility and CV measurements as well as DFT quantum chemical calculations. Its single crystal suggests was found to be surrounded by the both pairs of molecules of DHA and DMF through six oxygen atoms with octahedral coordination sphere. The obtained magnetic susceptibilities are positive and agree with its paramagnetic state. In addition to the experimental investigations, optimized geometry, spectroscopic and electronic properties were also performed using DFT calculation with B3LYP/6-31G(d,p) level of theory. The nonlinear optical (NLO) properties of this complex are again examined. Some suitable quantum descriptors (EHOMO, ELUMO, Energy gap, Global hardness), Milliken atomic charge, Electrophilic potion and Molecular Electrostatic Potential) have been elegantly described. Molecular docking results demonstrated that the docked nickel complex displayed remarkable binding energy with Mpro. Besides, important molecular properties and ADME pharmacokinetic profiles of possible Mpro inhibitors were assessed by in silico prediction.
Collapse
Affiliation(s)
- Wassila Derafa
- Laboratory of Electrochemistry, Molecular Engineering and Redox Catalysis, Department of Process Engineering, Faculty of technology, University of Ferhat Abbas, Setif 19000, Algeria,Chemistry Department, College of Science, Jouf University, Sakaka 72388, Saudi Arabia
| | - Djouhra Aggoun
- Laboratory of Electrochemistry, Molecular Engineering and Redox Catalysis, Department of Process Engineering, Faculty of technology, University of Ferhat Abbas, Setif 19000, Algeria,Chemistry Department, Faculty of sciences, University Ferhat Abbas, Setif 19000 Algeria,Corresponding author at: Laboratory of Electrochemistry, Molecular Engineering and Redox Catalysis, Department of Process Engineering, Faculty of technology, University of Ferhat Abbas, Setif 19000, Algeria
| | - Zakia Messasma
- Laboratory of Electrochemistry, Molecular Engineering and Redox Catalysis, Department of Process Engineering, Faculty of technology, University of Ferhat Abbas, Setif 19000, Algeria,Chemistry Department, Faculty of sciences, University Ferhat Abbas, Setif 19000 Algeria
| | - Selma Houchi
- Laboratory of Applied Biochemistry, Faculty of Natural and Life Sciences, University Ferhat Abbas, Setif 19000 Algeria,Department of Biochemistry Faculty of Natural and Life Sciences, University Ferhat Abbas, Setif 19000 Algeria
| | - Sofiane Bouacida
- Department of Sciences of Matter, Faculty of Exact Sciences, Oum El Bouaghi University, 04000, Algeria,Research Unit of Environmental Chemistry and Molecular Structural CHEMS, University of the Mentouri Brothers, Constantine, Algeria
| | - Ali Ourari
- Laboratory of Electrochemistry, Molecular Engineering and Redox Catalysis, Department of Process Engineering, Faculty of technology, University of Ferhat Abbas, Setif 19000, Algeria
| |
Collapse
|
5
|
Basak T, Frontera A, Chattopadhyay S. Insight into non-covalent interactions in two triamine-based mononuclear iron( iii) Schiff base complexes with special emphasis on the formation of Br⋯π halogen bonding. CrystEngComm 2021. [DOI: 10.1039/d0ce01534b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The nature and characteristics of noncovalent interactions that play important roles in the crystal packing of two iron(iii) complexes have been discussed.
Collapse
Affiliation(s)
- Tanmoy Basak
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata 700032
- India
| | - Antonio Frontera
- Departamento de Química
- Universitat de les IllesBalears
- 07122 Palma
- Spain
| | | |
Collapse
|
6
|
Khan S, Dutta T, Cortijo M, González-Prieto R, Drew MGB, Gomila RM, Frontera A, Chattopadhyay S. Phenoxido mediated antiferromagnetic and azide mediated ferromagnetic coupling in two dinuclear ferromagnetic nickel( ii) complexes with isomeric Schiff bases: a theoretical insight on the pathway of magnetic interaction. CrystEngComm 2021. [DOI: 10.1039/d0ce01861a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two relatively rare mixed phenoxo and azide bridged dinuclear nickel(ii) complexes have been discussed. Both complexes show strong intermolecular hydrogen bonding interactions and exhibit ferromagnetic exchange coupling.
Collapse
Affiliation(s)
- Samim Khan
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Tamal Dutta
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata – 700032
- India
| | - Miguel Cortijo
- Departamento de Química Inorgánica
- Facultad de Ciencias Químicas
- Universidad Complutense de Madrid
- Madrid
- Spain
| | - Rodrigo González-Prieto
- Departamento de Química Inorgánica
- Facultad de Ciencias Químicas
- Universidad Complutense de Madrid
- Madrid
- Spain
| | | | - Rosa M. Gomila
- Serveis Cientifico-Tècnics
- Universitat de les Illes Balears
- 07122 Palma de Mallorca
- SPAIN
| | - Antonio Frontera
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma de Mallorca
- SPAIN
| | | |
Collapse
|
7
|
Kansiz S, Meral S, Dege N, Agar AA, Fritsky IO. Crystal structure and Hirshfeld surface analysis of 2,2'-{(1 E,1' E)-[ethane-1,2-diylbis(aza-nylyl-idene)]bis-(methanylyl-idene)}bis-[4-(tri-fluoro-meth-oxy)phenol]copper(II) hydro-quinone hemisolvate. Acta Crystallogr E Crystallogr Commun 2019; 75:1729-1733. [PMID: 31709098 PMCID: PMC6829737 DOI: 10.1107/s2056989019014294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 10/20/2019] [Indexed: 11/29/2022]
Abstract
In the title com-plex, [Cu(C18H12F6N2O4)]·0.5C6H6O2, the CuII ion has a square-planar coordination geometry, being ligated by two N and two O atoms of the tetra-dentate open-chain Schiff base ligand 6,6'-{(1E,1'E)-[ethane-1,2-diylbis(aza-nylyl-idene)]bis-(methanylyl-idene)}bis-[2-(tri-fluoro-meth-oxy)phenol]. The crystal packing is stabilized by intra-molecular O-H⋯O and inter-molecular C-H⋯F, C-H⋯O and C-H⋯π hydrogen bonds. In addition, weak π-π inter-actions form a three-dimensional structure. Hirshfeld surface analysis and two-dimensional fingerprint plots were performed and created to analyze the inter-molecular inter-actions present in the crystal, indicating that the most important contributions for the crystal packing are from F⋯H/H⋯F (25.7%), H⋯H (23.5%) and C⋯H/H⋯C (12.6%) inter-actions.
Collapse
Affiliation(s)
- Sevgi Kansiz
- Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139 Kurupelit, Samsun, Turkey
| | - Seher Meral
- Boyabat Vocational School, Sinop University, 57200 Sinop, Turkey
| | - Necmi Dege
- Department of Physics, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139 Kurupelit, Samsun, Turkey
| | - Aysen Alaman Agar
- Department of Chemistry, Faculty of Arts and Sciences, Ondokuz Mayıs University, 55139 Kurupelit, Samsun, Turkey
| | - Igor O. Fritsky
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 64 Vladimirska Str., Kiev 01601, Ukraine
| |
Collapse
|
8
|
Horn Jr. A, Englert D, Roberts AE, Comba P, Schenk G, Krenske EH, Gahan LR. Synthesis, Magnetic Properties, and Catalytic Properties of a Nickel(II)-Dependent Biomimetic of Metallohydrolases. Front Chem 2018; 6:441. [PMID: 30320072 PMCID: PMC6168013 DOI: 10.3389/fchem.2018.00441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 09/05/2018] [Indexed: 11/13/2022] Open
Abstract
A dinickel(II) complex of the ligand 1,3-bis(bis(pyridin-2-ylmethyl)amino)propan-2-ol (HL1) has been prepared and characterized to generate a functional model for nickel(II) phosphoesterase enzymes. The complex, [Ni2(L1)(μ-OAc)(H2O)2](ClO4)2·H2O, was characterized by microanalysis, X-ray crystallography, UV-visible, and IR absorption spectroscopy and solid state magnetic susceptibility measurements. Susceptibility studies show that the complex is antiferromagnetically coupled with the best fit parameters J = -27.4 cm-1, g = 2.29, D = 28.4 cm-1, comparable to corresponding values measured for the analogous dicobalt(II) complex [Co2(L1)(μ-OAc)](ClO4)2·0.5 H2O (J = -14.9 cm-1 and g = 2.16). Catalytic measurements with the diNi(II) complex using the substrate bis(2,4-dinitrophenyl)phosphate (BDNPP) demonstrated activity toward hydrolysis of the phosphoester substrate with K m ~10 mM, and k cat ~0.025 s-1. The combination of structural and catalytic studies suggests that the likely mechanism involves a nucleophilic attack on the substrate by a terminal nucleophilic hydroxido moiety.
Collapse
Affiliation(s)
- Adolfo Horn Jr.
- Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, Brazil
| | - Daniel Englert
- Anorganisch-Chemisches Institut and Interdisciplinary Center of Scientific Computing, Universität Heidelberg, Heidelberg, Germany
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Asha E. Roberts
- Anorganisch-Chemisches Institut and Interdisciplinary Center of Scientific Computing, Universität Heidelberg, Heidelberg, Germany
| | - Peter Comba
- Anorganisch-Chemisches Institut and Interdisciplinary Center of Scientific Computing, Universität Heidelberg, Heidelberg, Germany
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Elizabeth H. Krenske
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| | - Lawrence R. Gahan
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia
| |
Collapse
|
9
|
Daigre G, Costuas K, Tarasenko MS, Ledneva AY, Naumov NG, Lemoine P, Guizouarn T, Molard Y, Amela-Cortes M, Audebrand N, Cordier S. Stabilization of Ni 2+ dimers in hexacyano Mo 6 cluster-based Prussian blue derivatives: experimental and theoretical investigations of magnetic properties. Dalton Trans 2018; 47:1122-1130. [PMID: 29265139 DOI: 10.1039/c7dt02748f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, two new octahedral molybdenum cyanide cluster compounds, namely [{Ni(NH3)6}4{Ni2(NH3)8}1][Mo6Br6Q2(CN)6]3·12H2O, Q = S (1) and Se (2), have been synthesized as single crystals by slow diffusion of a solution of nickel chloride into aqueous ammonia solutions of a K2Cs2[Mo6Br6Q2(CN)6] molybdenum cyanide cluster-based compound. Both 1 and 2 were structurally characterized by single-crystal X-ray diffraction. They are isostructural and crystallize in the cubic system (Im3[combining macron]m (no. 229); Z = 2, a = 18.147(1) Å, and V = 5976(1) Å3 and a = 18.188(2) Å and V = 6016(2) Å3 for 1 and 2, respectively). 1 and 2 are based on the association of [Mo6Bri6Qi2(CN)a6]4- (Q = S, Se) cluster anions with Ni2+ dimer-based cubic [Ni2(NH3)8]4+ and octahedral [Ni(NH3)6]2+ cations. The structure is based on 2-fold interpenetrated [{Ni(NH3)6}4{Ni2(NH3)8}1][Mo6Br6Q2(CN)6]3 frameworks related to each other by [½, ½, ½] translation. The unit cell is based on a body-centered cubic framework of cubic [Ni2(NH3)8]4+. The [Mo6Bri6Qi2(CN)a6]4- (Q = S, Se) cluster units are located in the middle of the edges and at the center of the faces of the cell. The [{Ni(NH3)6}]2+ cations are located at the center of the cubes of the a/2 edge. The dimers [Ni2(NH3)8]4+ are stabilized by hydrogen bonds between the cyanide ligands of the cluster unit and the hydrogen atoms of the ammonia molecules. Both compounds exhibit a weak antiferromagnetic coupling within the [Ni2(NH3)8]4+ dimer entities at low temperatures together with a paramagnetic behavior originating from the cations of the octahedral [{Ni(NH3)6}]2+ complexes.
Collapse
Affiliation(s)
- Gilles Daigre
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, France.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Tagliapietra M, Squarcina A, Hickey N, De Zorzi R, Geremia S, Sartorel A, Bonchio M. Hydrogen Evolution by Fe III Molecular Electrocatalysts Interconverting between Mono and Di-Nuclear Structures in Aqueous Phase. CHEMSUSCHEM 2017; 10:4430-4435. [PMID: 29096041 DOI: 10.1002/cssc.201701612] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/07/2017] [Indexed: 06/07/2023]
Abstract
A new FeL/Fe2 L2 manifold, with HL=2-({[di(2-pyridyl)methyl](methyl)amino}methyl)phenol, was prepared in gram scale (>50 % yield) and characterized in solution and solid state. The monomer/dimer interconversion is controlled in aqueous phase, upon varying the pH conditions. The electrocatalytic hydrogen evolution reaction (HER) occurs through the FeL monomer with added trifluoroacetic acid (TFA) and through the Fe2 L2 μ-oxo dimer in acetate buffer (pH 4.9), with an overpotential of about 1 V and faradaic yield up to 75 %. The resulting icat /ip values in the range 15-28 are among the highest reported for Fe-based electrocatalysts (icat is the catalytic current, whereas ip is the current of an Fe-based redox event).
Collapse
Affiliation(s)
- Mirko Tagliapietra
- Department of Chemical Sciences, ITM-CNR University of Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Andrea Squarcina
- Department of Chemical Sciences, ITM-CNR University of Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Neal Hickey
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127, Trieste, Italy
| | - Rita De Zorzi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127, Trieste, Italy
| | - Silvano Geremia
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Licio Giorgieri 1, 34127, Trieste, Italy
| | - Andrea Sartorel
- Department of Chemical Sciences, ITM-CNR University of Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Marcella Bonchio
- Department of Chemical Sciences, ITM-CNR University of Padova, Via Marzolo 1, 35131, Padova, Italy
| |
Collapse
|
11
|
Gusev AN, Shul'gin VF, Ryush IO, Hasegawa M, Kiskin MA, Efimov NN, Lyssenko KA, Eremenko IL, Linert W. Copper(II), Nickel(II), and Cobalt(II)/(III) Self-Assembled Polynuclear Complexes of Bis[(pyridin-2-yl)-1,2,4-triazol-3-yl]]methane. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601107] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexey N. Gusev
- General and Physical Chemistry Department; V. I. Vernadsky Crimean Federal University; Acad. Vernadsky av. 4 295007 Simferopol Crimea
| | - Victor F. Shul'gin
- General and Physical Chemistry Department; V. I. Vernadsky Crimean Federal University; Acad. Vernadsky av. 4 295007 Simferopol Crimea
| | - Irina O. Ryush
- General and Physical Chemistry Department; V. I. Vernadsky Crimean Federal University; Acad. Vernadsky av. 4 295007 Simferopol Crimea
| | - Miki Hasegawa
- Department of Chemistry and Biological Science; College of Science and Engineering; Aoyama Gakuin University; 252-5258 Kanagawa Japan
| | - Mikhail A. Kiskin
- N. S. Kurnakov Institute of General and Inorganic Chemistry; Russian Academy of Sciences; 119991 Moscow Russia
| | - Nikolay N. Efimov
- N. S. Kurnakov Institute of General and Inorganic Chemistry; Russian Academy of Sciences; 119991 Moscow Russia
| | - Konstantin A. Lyssenko
- N. S. Kurnakov Institute of General and Inorganic Chemistry; Russian Academy of Sciences; 119991 Moscow Russia
| | - Igor L. Eremenko
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 119991 Moscow Russia
| | - Wolfgang Linert
- Institute of Applied Synthetic Chemistry; Vienna University of Technology; Getreidemarkt 9/163-AC 1060 Vienna Austria
| |
Collapse
|
12
|
Akhtari K, Hassanzadeh K, Zarei SA, Fakhraei B, Akhtari G. The role of non-covalent interaction in the hexadentate coordination environment on the magnetic behavior of binuclear helical complex [Ni2(L)2]4+: A broken-symmetry approach. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.11.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
13
|
Archana V, Imamura Y, Sakiyama H, Hada M. Correlating Magnetic Exchange in Dinuclear Bis(phenolate)-Bridged Complexes: A Computational Perspective. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Velloth Archana
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University
| | - Yutaka Imamura
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University
| | - Hiroshi Sakiyama
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University
| | - Masahiko Hada
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University
| |
Collapse
|
14
|
Fondo M, Doejo J, García-Deibe AM, Sanmartín-Matalobos J, Vicente R. A Ni8metallacalix[4]arene and a Cu4molecular rhomboid: limiting the nuclearity of carboxysalen-like metal complexes. CrystEngComm 2016. [DOI: 10.1039/c6ce01384h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Zarei SA, Khaledian D, Akhtari K, Hassanzadeh K. Copper(II) and nickel(II) complexes of tetradentate Schiff base ligand: UV-Vis and FT-IR spectra and DFT calculation of electronic, vibrational and nonlinear optical properties. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1018356] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
16
|
Microwave and solvothermal methods for the synthesis of nickel and ruthenium complexes with 9-anthracene carboxylate ligand. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.07.063] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
17
|
Oxidation of substituted benzyl amines using a phenoxo-bridged dimeric nickel(II) complex: synthesis, crystal structure and catalytic activity. TRANSIT METAL CHEM 2014. [DOI: 10.1007/s11243-014-9905-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
18
|
Eremin DB, Ananikov VP. Exceptional Behavior of Ni2O2 Species Revealed by ESI-MS and MS/MS Studies in Solution. Application of Superatomic Core To Facilitate New Chemical Transformations. Organometallics 2014. [DOI: 10.1021/om500637k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Dmitry B. Eremin
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Pr. 47, Moscow 119991, Russia
| | - Valentine P. Ananikov
- Zelinsky
Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Pr. 47, Moscow 119991, Russia
- Department
of Chemistry, Saint Petersburg State University, Stary Petergof, 198504, Russia
| |
Collapse
|
19
|
Alzamly A, Gambarotta S, Korobkov I, Murugesu M, Le Roy JJH, Budzelaar PHM. Isolation of a hexanuclear chromium cluster with a tetrahedral hydridic core and its catalytic behavior for ethylene oligomerization. Inorg Chem 2014; 53:6073-81. [PMID: 24874446 DOI: 10.1021/ic500445b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A chromium complex [2-(NHCH2PPh2)C5H4N]CrCl3·THF2 (1) of the ligand PyNHCH2PPh2 has been synthesized, characterized, and examined for its catalytic behavior toward ethylene oligomerization. When complex 1 was treated with (i-Bu)3Al, an unprecedented divalent polyhydride chromium cluster μ,κ(1),κ(2),κ(3)-N,N,P-{[2-(NCH2PPh2)C5H4N]Cr(μ-H)}4[(μ-Cl)Cr(μ-Cl)Al(i-Bu)2Cl]2 (2) was obtained. The complex contains a Cr4H4 core, which is expected to be diamagnetic, and which remains coordinated to two additional divalent high-spin Cr atoms via bridging interactions. Two aluminate residues remain bonded to the peripheral chromium atoms. The structure, magnetism, and electronic configuration are herein discussed.
Collapse
Affiliation(s)
- Ahmed Alzamly
- Department of Chemistry, University of Ottawa , 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | | | | | | | | | | |
Collapse
|
20
|
Modak R, Sikdar Y, Mandal S, Chatterjee S, Bieńko A, Mroziński J, Goswami S. Syntheses, crystallographic characterization, catecholase activity and magnetic properties of three novel aqua bridged dinuclear nickel(II) complexes. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.03.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
21
|
Cortijo M, Herrero S, Jerez B, Jiménez-Aparicio R, Perles J, Priego JL, Torroba J, Tortajada J. One-Dimensional [Ni(O2CR)2(NN)x] Polymers: Structural, Magnetic, and Density Functional Theory Studies. Chempluschem 2014. [DOI: 10.1002/cplu.201402005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
22
|
Saha M, Nasani R, Das M, Mahata A, Pathak B, Mobin SM, Carrella LM, Rentschler E, Mukhopadhyay S. Limiting nuclearity in formation of polynuclear metal complexes through [2 + 3] cycloaddition: synthesis and magnetic properties of tri- and pentanuclear metal complexes. Dalton Trans 2014; 43:8083-93. [DOI: 10.1039/c4dt00378k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cycloaddition reaction between [Ni(L)(N3)] and different organonitriles afforded tetrazolate bridged tri- and pentanuclear nickel(ii) complexes.
Collapse
Affiliation(s)
- Manideepa Saha
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Rajendar Nasani
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Mriganka Das
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Arup Mahata
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Biswarup Pathak
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Shaikh M. Mobin
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Luca M. Carrella
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University of Mainz
- D-55128 Mainz, Germany
| | - Eva Rentschler
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University of Mainz
- D-55128 Mainz, Germany
| | - Suman Mukhopadhyay
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| |
Collapse
|
23
|
Burkhardt A, Buchholz A, Görls H, Plass W. Intramolecular Hydrogen Bonding of a Chloride Acceptor Supported by a Dinuclear Nickel(II) Complex withN-Salicylidene Hydrazide Ligand: Crystal Structure and Magnetic Properties. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300418] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
24
|
Cortijo M, González‐Prieto R, Herrero S, Jiménez‐Aparicio R, Sánchez‐Rivera P. Ferromagnetic Interactions through Hydrogen Bonds in a One‐Dimensional Ni
II
Coordination Polymer. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300875] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Miguel Cortijo
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid Ciudad Universitaria, 28040‐Madrid, Spain, http://www.ucm.es/info/inorg1/qcmm/qcmm.htm; www.ucm.es
| | - Rodrigo González‐Prieto
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid Ciudad Universitaria, 28040‐Madrid, Spain, http://www.ucm.es/info/inorg1/qcmm/qcmm.htm; www.ucm.es
| | - Santiago Herrero
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid Ciudad Universitaria, 28040‐Madrid, Spain, http://www.ucm.es/info/inorg1/qcmm/qcmm.htm; www.ucm.es
| | - Reyes Jiménez‐Aparicio
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid Ciudad Universitaria, 28040‐Madrid, Spain, http://www.ucm.es/info/inorg1/qcmm/qcmm.htm; www.ucm.es
| | - Paula Sánchez‐Rivera
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid Ciudad Universitaria, 28040‐Madrid, Spain, http://www.ucm.es/info/inorg1/qcmm/qcmm.htm; www.ucm.es
| |
Collapse
|
25
|
McKinnon SDJ, Patrick BO, Lever ABP, Hicks RG. Binuclear ruthenium complexes of a neutral radical bridging ligand. A new "spin" on mixed valency. Inorg Chem 2013; 52:8053-66. [PMID: 23789578 DOI: 10.1021/ic400704j] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The electronic structures of (LX)2Ru(Vd)Ru(LX)2 complexes (Vd = 1,5-diisopropyl-3-(4,6-dimethyl-2-pyrimidinyl)-6-oxoverdazyl radical; LX = acac (acetylacetonate) or hfac (hexafluoroacetylacetonate)) in multiple charge states have been investigated experimentally and computationally. The main focus was to probe the consequences of the interplay between the ruthenium ions and the redox-active verdazyl ligand for possible mixed-valent behavior. Cyclic voltammetry studies reveal one reversible reduction and one reversible oxidation process for both complexes; in addition the acac-based derivative possesses a second reversible oxidation. Analysis of a collection of experimental (X-ray structures, EPR, electronic spectra) and computational (TD-DFT (PCM)) data reveal that the ruthenium ancillary ligands (acac vs hfac) have dramatic consequences for the electronic structures of the complexes in all charge states studied. In the hfac series, the neutral complex is best regarded as a binuclear Ru(II) species bridged by a neutral radical ligand. Reduction to give the anionic complex takes place on the verdazyl ligand, whereas oxidation to the cation (a closed shell species) is shared between Vd and ruthenium. For the acac-based complexes, the neutral species is most accurately represented as a Ru(II)/Ru(III) mixed valent complex containing a bridging verdazyl anion, though some bis(Ru(II))-neutral radical character remains. The monocation complex contains a significant contribution from a "broken symmetry" singlet diradical structure, best represented as a bis-Ru(III) system with an anionic ligand, with significant spin coupling of the two Ru(III) centers via the Vd(-1) ligand (calculated J = -218 cm(-1)). The dication, a spin doublet, consists of two Ru(III) ions linked (and antiferromagnetically coupled) to the neutral radical ligand. Computed net σ- and π-back-donation, spin densities, and orbital populations are provided. Time dependent DFT is used to predict the optical spectra and assign experimental data.
Collapse
Affiliation(s)
- Stephen D J McKinnon
- Department of Chemistry, University of Victoria, P.O. Box 3065 STN CSC, Victoria, B.C. V8W 3 V6, Canada
| | | | | | | |
Collapse
|
26
|
Cortijo M, Herrero S, Jiménez-Aparicio R, Perles J, Priego JL, Torralvo MJ, Torroba J. Hybrid Polyfunctional Systems Based on Nickel(II) Isonicotinate. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201461] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
27
|
Biswas R, Ida Y, Baker ML, Biswas S, Kar P, Nojiri H, Ishida T, Ghosh A. A New Family of Trinuclear Nickel(II) Complexes as Single-Molecule Magnets. Chemistry 2013; 19:3943-53. [DOI: 10.1002/chem.201202795] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 11/08/2012] [Indexed: 11/09/2022]
|
28
|
Dieng M, Diouf O, Gaye M, Sall AS, Pérez-Lourido P, Valencia L, Caneschi A, Sorace L. Polynuclear nickel(II) complexes with salicylaldimine derivative ligands. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.09.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
29
|
Jana S, Chatterjee S, Chattopadhyay S. Syntheses, characterization and X-ray crystal structures of hexa-coordinated monomeric and oxo-bridged dimeric Fe(III) compounds with salen-type Schiff bases. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.08.085] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
30
|
Biswas R, Giri S, Saha SK, Ghosh A. One Ferromagnetic and Two Antiferromagnetic Dinuclear Nickel(II) Complexes Derived from a Tridentate N,N,O-Donor Schiff Base Ligand: A Density Functional Study of Magnetic Coupling. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200028] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
31
|
A new tetranuclear copper(II) complex with oximate bridges: Structure, magnetic properties and DFT study. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.07.048] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
32
|
McKinnon SDJ, Patrick BO, Lever ABP, Hicks RG. Electronic Structure Investigations of Neutral and Charged Ruthenium Bis(β-diketonate) Complexes of Redox-Active Verdazyl Radicals. J Am Chem Soc 2011; 133:13587-603. [DOI: 10.1021/ja204575u] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephen D. J. McKinnon
- Department of Chemistry, University of Victoria, P.O. Box 3065 STN CSC, Victoria, BC. V8W 3V6, Canada
| | - Brian O. Patrick
- Crystallography Laboratory, Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - A. B. P. Lever
- Department of Chemistry, York University, Toronto, Ontario, M3J 1P3, Canada
| | - Robin G. Hicks
- Department of Chemistry, University of Victoria, P.O. Box 3065 STN CSC, Victoria, BC. V8W 3V6, Canada
| |
Collapse
|
33
|
Plaul D, Plass W. Phloroglucinol-bridged trinuclear complexes with three paramagnetic octahedral nickel(II) ions: Syntheses, crystal structures, and magnetic properties. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.03.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
34
|
Biswas R, Kar P, Song Y, Ghosh A. The importance of an additional water bridge in making the exchange coupling of bis(μ-phenoxo) dinickel(II) complexes ferromagnetic. Dalton Trans 2011; 40:5324-31. [PMID: 21479330 DOI: 10.1039/c0dt01585g] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new nickel(II) complexes [Ni(2)L(2)(PhCOO)(2)(H(2)O)] (1), [Ni(2)L(2)(PhCH(2)COO)(2)(H(2)O)] (2) have been synthesized using a tridentate Schiff base ligand, HL (2-[(3-dimethylamino-propylimino)-methyl]-phenol) and the carboxylate monoanions, benzoate and phenylacetate, respectively. The complexes have been characterized by spectral analysis, variable temperature magnetic susceptibility measurement and crystal structure analysis. The structural analyses reveal that both complexes are dinuclear in which the distorted octahedral Ni(2+) ions share a face, bridged by one water molecule and two μ(2)-phenoxo oxygen atoms. A monodentate benzoate or phenylacetate anion and two nitrogen atoms of the chelating deprotonated Schiff base (L) complete the hexa-coordination around the metal ion. Variable-temperature magnetic susceptibility studies indicate the presence of dominant ferromagnetic exchange coupling in complexes 1 and 2 with J values of 11.1(2) and 10.9(2) cm(-1) respectively. An attempt has been made to rationalize the observed magneto-structural behavior considering the importance of the additional water bridge in the present two complexes and also in other similar species.
Collapse
Affiliation(s)
- Rituparna Biswas
- Department of Chemistry, University College of Science, University of Calcutta, 92, A.P.C. Road, Kolkata, 700 009, India
| | | | | | | |
Collapse
|
35
|
Mondal P, Mondal A, Colacio E, Banerjee A. Binuclear terephthalato-bridged copper(II) complex with N2O2 coordinating tripodal ligand: synthesis, structure, magnetic properties, and DFT study. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.494723] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Pallab Mondal
- a Department of Chemistry, Inorganic Chemistry Section , Jadavpur University , Kolkata 700 032, West Bengal, India
| | - Abhishake Mondal
- a Department of Chemistry, Inorganic Chemistry Section , Jadavpur University , Kolkata 700 032, West Bengal, India
| | - Enrique Colacio
- b Departamento de Quimica Inorganica, Facultad de Ciencias , Universidad de Granada , Granada 18071, Spain
| | - Atanu Banerjee
- a Department of Chemistry, Inorganic Chemistry Section , Jadavpur University , Kolkata 700 032, West Bengal, India
| |
Collapse
|
36
|
Banerjee A, Singh R, Mondal P, Colacio E, Rajak KK. Tetranuclear Copper(II) Complexes Bearing Cu
4
O
6
and Cu
4
O
4
Cores: Synthesis, Structure, Magnetic Properties, and DFT Study. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200900709] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Atanu Banerjee
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Reena Singh
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Pallab Mondal
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Enrique Colacio
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain
| | - Kajal Krishna Rajak
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700032, India
| |
Collapse
|
37
|
Rusere LN, Shalumova T, Tanski JM, Tyler LA. Synthesis and crystal structures of Ni(II), Cu(II) and μ-oxo-Fe(III) complexes of a salen type ligand: Mononuclear versus multinuclear complex formation. Polyhedron 2009. [DOI: 10.1016/j.poly.2009.08.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
38
|
Syntheses and crystal structures of mono-, di- and trinuclear cobalt complexes of a salen type ligand. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.06.023] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
39
|
Banerjee A, Sarkar S, Chopra D, Colacio E, Rajak KK. Binuclear copper(II) complexes with N4O3 coordinating heptadentate ligand: synthesis, structure, magnetic properties, density-functional theory study, and catecholase activity. Inorg Chem 2008; 47:4023-31. [PMID: 18412334 DOI: 10.1021/ic7015935] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The N4O3 coordinating heptadentate ligand afforded binuclear complex [Cu 2(H 2L)(mu-OH)](ClO4)2 (1) and [Cu2(L)(H2O)2]PF6 (2). In complex 1, two copper ions are held together by mu-phenoxo and mu-hydroxo bridges, whereas in complex 2, the copper centers are connected only by a mu-phenoxo bridge. In 1, both the Cu(II) centers have square pyramidal geometry (tau=0.01-0.205), whereas in the case of 2, one Cu(II) center has square pyramidal (tau=0.2517) and other one has square based pyramidal distorted trigonal bipyramidal (tau=0.54) geometry. Complexes 1 and 2 show an strong intramolecular and very weak antiferromagnetic interaction, respectively. Density-functional theory calculations were performed to establish the magneto structural correlation between the two paramagnetic copper(II) centers. Both of the complexes display a couple of one-electron reductive responses near -0.80 and -1.10 V. The complexes show significant catalytic activity at pH 8.5 on the oxidation of 3,5-di- tert-butylcatechol (3,5-DTBC) to 3,5-di- tert-butylquinone (3,5-DTBQ), and the activity measured in terms of kcat=29-37 h(-1).
Collapse
Affiliation(s)
- Atanu Banerjee
- Inorganic Chemistry Section, Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | | | | | | | | |
Collapse
|
40
|
Roth A, Buchholz A, Rudolph M, Schütze E, Kothe E, Plass W. Directed Synthesis of a Heterobimetallic Complex Based on a Novel Unsymmetric Double-Schiff-Base Ligand: Preparation, Characterization, Reactivity and Structures of Hetero- and Homobimetallic Nickel(II) and Zinc(II) Complexes. Chemistry 2008; 14:1571-83. [DOI: 10.1002/chem.200701124] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
41
|
Banerjee A, Singh R, Chopra D, Colacio E, Rajak KK. Mixed bridged dinuclear Ni(II) complexes: synthesis, structure, magnetic properties and DFT study. Dalton Trans 2008:6539-45. [DOI: 10.1039/b809197h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|