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Chowdhury M, Biswas N, Saha S, Zangrando E, Rizzoli C, Sepay N, Roy Choudhury C. Structural investigation, theoretical DFT, Hirshfeld surface analysis and catalytic behaviour towards 3,5-DTBC oxidation of two cobalt(ii) complexes with semicarbazone Schiff base ligands. TRANSIT METAL CHEM 2023. [DOI: 10.1007/s11243-023-00523-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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2
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Temperature controlled synthesis and transformation of dinuclear to hexanuclear zinc complexes of a benzothiazole based ligand: Coordination induced fluorescence enhancement and quenching. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Karim S, Dasgupta S, Parveen R, Biswas S, Das D. A mechanistic approach for in‐vitro anticancer activity via nucleic acid fragmentation by copper(II) complex anchored on MCM‐41. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Suhana Karim
- Department of Chemistry University of Calcutta Kolkata India
| | | | - Rumana Parveen
- Department of Chemistry University of Calcutta Kolkata India
| | - Subhendu Biswas
- Department of Chemistry University of Calcutta Kolkata India
| | - Debasis Das
- Department of Chemistry University of Calcutta Kolkata India
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4
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Mondal R, Chakraborty A, Ghanta R, Menéndez MI, Chattopadhyay T. Experimental and theoretical investigation of the catalytic performance of reduced Schiff base and Schiff base iron complexes: Transformation to magnetically retrievable catalyst. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6332] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Rimpa Mondal
- Department of Chemistry Diamond Harbour Women's University Sarisha India
| | - Aratrika Chakraborty
- Department of Chemistry, University College of Science University of Calcutta Kolkata India
- Department of Chemistry Lady Brabourne College Kolkata India
| | - Rinku Ghanta
- Department of Chemistry Diamond Harbour Women's University Sarisha India
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5
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Khan MS, Khalid M, Ahmad MS, Kamal S, Shahid M, Ahmad M. Effect of structural variation on enzymatic activity in tetranuclear (Cu 4) clusters with defective cubane core. J Biomol Struct Dyn 2021; 40:9067-9080. [PMID: 34042018 DOI: 10.1080/07391102.2021.1924263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The stimulus to the modeling of enzyme functioning sites comes from their potential to give insight into the natural enzyme's mechanistic pathways, ascertain the role of that different metal ion in the active site and construct better catalysts motivated by nature. The presence of metal ion leads to the activation of molecular oxygen in the metalloenzymes. The metalloenzymes such as the catechol oxidase (CO) enzyme that oxidizes the catechol to corresponding quinones which eventually protect damage tissues from plant and pathogen. Thus, the design and characterization of catalysts used as selectively and efficiently oxidation reactions have grown to be unique challenges for modern inorganic chemists. In this work, two novel tetranuclear complexes (1 and 2) have been synthesized in excellent yield. The complexes were characterized using various spectroscopic techniques such as FTIR, UV-Visible and PXRD pattern. The structure of 1 and 2 was elucidated by SC-XRD (single crystal X-ray diffraction) analysis. The magnetic study reveals the presence of the antiferromagnetic nature of 1 and 2. Both 1 and 2 shows a very good catecholase-like activity by oxidizing the catechol to analogous quinone in methanolic solution. Thus, a structure-activity relationship can further help us design other substituted tetranuclear complexes with enhanced catecholase like activity.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- M Shahnawaz Khan
- Functional Inorganic Materials Lab (FIML), Department of Chemistry, Aligarh Muslim University, Aligarh, India
| | - Mohd Khalid
- Functional Inorganic Materials Lab (FIML), Department of Chemistry, Aligarh Muslim University, Aligarh, India
| | - M Shahwaz Ahmad
- Functional Inorganic Materials Lab (FIML), Department of Chemistry, Aligarh Muslim University, Aligarh, India
| | - Samrah Kamal
- Functional Inorganic Materials Lab (FIML), Department of Chemistry, Aligarh Muslim University, Aligarh, India
| | - M Shahid
- Functional Inorganic Materials Lab (FIML), Department of Chemistry, Aligarh Muslim University, Aligarh, India
| | - Musheer Ahmad
- Department of Applied Chemistry (ZHCET), Aligarh Muslim University, Aligarh, India
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6
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Maji A, Rathi S, Singh A, Singh UP, Ghosh K. Mononuclear iron(III) complexes derived from tridentate ligands containing non‐innocent phenolato donors: Self‐activated nuclease, protease, and phenoxazinone synthase activity studies. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ankur Maji
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee India
| | - Sweety Rathi
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee India
| | - Anshu Singh
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee India
| | - Udai P. Singh
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee India
| | - Kaushik Ghosh
- Department of Chemistry Indian Institute of Technology Roorkee Roorkee India
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7
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Mandal A, Sarkar A, Adhikary A, Samanta D, Das D. Structure and synthesis of copper-based Schiff base and reduced Schiff base complexes: a combined experimental and theoretical investigation of biomimetic catalytic activity. Dalton Trans 2020; 49:15461-15472. [PMID: 33141130 DOI: 10.1039/d0dt02784g] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three copper(ii) complexes, [Cu(L1)(NCS)]n (1), [Cu(L1)(N3)]n (2) and [Cu(L2)(N3)] (3) were synthesized from one Schiff base ligand and one reduced Schiff base ligand, (E)-4-chloro-2-[(2-propylaminoethylimino)methyl]phenol (HL1) and 4-chloro-2-[(2-(propylaminoethylamino) methyl]phenol (HL2), respectively. All complexes were characterized by various physicochemical studies, such as FT-IR, UV-Vis, ESI-MS, EPR and single crystal X-ray diffraction. Complexes 1 and 2 have 1D polymeric chain-like structures bridging through thiocyanate and azide anions, whereas complex 3 has a mononuclear structure in the solid state. All the complexes are active towards mimicking two well-known proteins, phosphatase and phenoxazinone synthase, using the disodium salt of 4-nitrophenylphosphate (4-NPP) and 2-aminophenol (OAP) as the substrate in DMF medium. Complexes 2 and 3 show the highest activity towards phosphatase and phenoxazinone synthase activity with kcat values of 22.6 s-1 and 134.4 h-1, respectively. EPR studies confirmed that for complex 1, the OAP oxidation goes through the generation of an organic radical at g = 1.99, which is due to an imine radical formation, whereas the metal center redox pathway is followed for complex 3. Extensive DFT calculations have been performed for both catalytic studies to put forward the most probable mechanistic pathways.
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Affiliation(s)
- Arnab Mandal
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India.
| | - Abani Sarkar
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India.
| | - Amit Adhikary
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India.
| | - Debabrata Samanta
- Department of Chemistry, Dukhulal Nibaran Chandra (DNC) College, Aurangabad, West Bengal 742201, India
| | - Debasis Das
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India.
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8
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9
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Dasgupta S, Mandal A, Samanta D, Zangrando E, Maity S, Das D. Catalytic promiscuity of a copper(II)-Mannich base complex having unprecedented radical pathway in catecholase activity. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119480] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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10
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Dasgupta S, Paul S, Samanta D, Hansda S, Zangrando E, Das D. Catalytic promiscuity of two novel cobalt(III) complexes derived from redox non-innocent Schiff base ligands: Unraveling the role of methyl groups in the ligand backbone on catalytic efficiency. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119336] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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11
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Mandal A, Dasgupta S, Adhikary A, Samanta D, Zangrando E, Das D. Synthesis of Mn3O4 nanozymes from structurally characterized phenoxazinone synthase models based on manganese(iii) Schiff base complexes. Dalton Trans 2020; 49:5999-6011. [DOI: 10.1039/d0dt00355g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mn3O4 nanozymes of phenoxazinone synthase have been prepared from the manganese(iii) based mimicking models of the enzyme.
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Affiliation(s)
- Arnab Mandal
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
| | | | - Amit Adhikary
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
| | - Debabrata Samanta
- Department of Chemistry
- Indian Institute of Technology
- Kanpur-208016
- India
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - Debasis Das
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
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12
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The role of methyl and benzyl substituted dithiocarbazate of 2-acetyl pyridine for the formation of bridged dimeric and unbridged monomeric copper(II) complexes and catecholase mimetic activity of the complexes. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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De los Santos ZA, MacAvaney S, Russell K, Wolf C. Tandem Use of Optical Sensing and Machine Learning for the Determination of Absolute Configuration, Enantiomeric and Diastereomeric Ratios, and Concentration of Chiral Samples. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912904] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Sean MacAvaney
- Department of Computer Science Georgetown University Washington DC 20057 USA
| | - Katina Russell
- Department of Computer Science Georgetown University Washington DC 20057 USA
| | - Christian Wolf
- Department of Chemistry Georgetown University Washington DC 20057 USA
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14
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De Los Santos ZA, MacAvaney S, Russell K, Wolf C. Tandem Use of Optical Sensing and Machine Learning for the Determination of Absolute Configuration, Enantiomeric and Diastereomeric Ratios, and Concentration of Chiral Samples. Angew Chem Int Ed Engl 2019; 59:2440-2448. [PMID: 31714669 DOI: 10.1002/anie.201912904] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/04/2019] [Indexed: 12/17/2022]
Abstract
We have developed an optical method for accurate concentration, er, and dr analysis of amino alcohols based on a simple mix-and-measure workflow that is fully adaptable to multiwell plate technology and microscale analysis. The conversion of the four aminoindanol stereoisomers with salicylaldehyde to the corresponding Schiff base allows analysis of the dr based on a change in the UV maximum at 420 nm that is very different for the homo- and heterochiral diastereomers and of the concentration of the sample using a hypsochromic shift of another absorption band around 340 nm that is independent of the analyte stereochemistry. Subsequent in situ formation of CuII assemblies in the absence and presence of base enables quantification of the er values for each diastereomeric pair by CD analysis. Applying a linear programming method and a parameter sweep algorithm, we determined the concentration and relative amounts of each of the four stereoisomers in 20 samples of vastly different stereoisomeric compositions with an averaged absolute percent error of 1.7 %.
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Affiliation(s)
| | - Sean MacAvaney
- Department of Computer Science, Georgetown University, Washington, DC, 20057, USA
| | - Katina Russell
- Department of Computer Science, Georgetown University, Washington, DC, 20057, USA
| | - Christian Wolf
- Department of Chemistry, Georgetown University, Washington, DC, 20057, USA
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15
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Structurally characterized mononuclear isostructural Ni(II), Cu(II) and Zn(II) complexes as a functional model for phenoxazinone synthase activity. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.114151] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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16
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Dasgupta S, Chakraborty P, Kundu P, Kara H, Aullón G, Zangrando E, Das D. Designing antiferromagnetically coupled mono-, di- and tri-bridged copper( ii)-based catecholase models by varying the ‘Auxiliary Parts’ of the ligand and anionic co-ligand. CrystEngComm 2019. [DOI: 10.1039/c9ce01115c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The role of the auxiliary part of ligands towards the architecture of copper(ii)-based catecholase models were unveiled with the help of DFT study.
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Affiliation(s)
| | | | - Priyanka Kundu
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
| | - Hulya Kara
- Department of Physics
- Faculty of Science and Art
- Balikesir University
- 10145 Balikesir
- Turkey
| | - Gabriel Aullón
- Departament de Química Inorgànica i Orgànica (Secció de Química Inorgànica) and Institut de QuímicaTeòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - Debasis Das
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
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17
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Dasgupta S, Aullón G, Zangrando E, Das D. Mapping the working route of phosphate monoester hydrolysis catalyzed by copper based models with special emphasis on the role of oxoanions by experimental and theoretical studies. NEW J CHEM 2019. [DOI: 10.1039/c8nj04018d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanistic pathway of phosphate-ester bond hydrolysis with special emphasis on the role of oxoanions was explored by experimental and theoretical study.
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Affiliation(s)
| | - Gabriel Aullón
- Departament de Química Inorgànica i Orgànica (Secció de Química Inorgànica) and Institut de QuímicaTeorica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences
- University of Trieste
- 34127 Trieste
- Italy
| | - Debasis Das
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
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18
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Synthesis and structural characterization of a cobalt(III) complex with an (N,S,O) donor Schiff base ligand: Catechol oxidase and phenoxazinone synthase activities. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.08.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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19
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Chatterjee A, Yadav HR, Choudhury AR, Ali A, Singh Y, Ghosh R. Tyrosinase and catecholase-like activities of a dinuclear Cu(II) complex. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.11.040] [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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20
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Ghosh K, Banerjee A, Bauzá A, Frontera A, Chattopadhyay S. One pot synthesis of two cobalt(iii) Schiff base complexes with chelating pyridyltetrazolate and exploration of their bio-relevant catalytic activities. RSC Adv 2018; 8:28216-28237. [PMID: 35542722 PMCID: PMC9084250 DOI: 10.1039/c8ra03035a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/16/2018] [Indexed: 11/22/2022] Open
Abstract
Two new cobalt(iii) tetrazolato complexes [Co(L1)(PTZ)(N3)] (1) and [Co(L2)(PTZ)(N3)] (2) {where H2L1 = 2((3-(methylamino)propylimino)methyl)-6-methoxyphenol, H2L2 = 2((3-(dimethylamino)propylimino)methyl)-6-ethoxyphenol and HPTZ = 5-(2-pyridyl)tetrazole}, have been synthesized via in situ 1,3-dipolar cycloaddition reaction of 2-cyanopyridine and sodium azide in the presence of cobalt(ii) nitrate hexahydrate and respective Schiff bases in the open atmosphere. The structures of both complexes have been confirmed by single crystal X-ray diffraction studies. Features of noncovalent interactions in the solid state of both complexes have been studied by means of DFT and MEP calculations and characterized using Bader's theory of “atoms in molecules” (AIM). These complexes act as biomimetic catalysts promoting the aerobic oxidation of 3,5-di-tert-butylcatechol (3,5-DTBC) to the corresponding o-benzoquinone at room temperature. The reaction follows Michaelis–Menten enzymatic reaction kinetics with turnover numbers of ∼0.030 s−1 in an acetonitrile–methanol (2 : 1) mixture. Both complexes are also reactive towards aerobic oxidation of o-aminophenol in acetonitrile–methanol (2 : 1) with turnover numbers ∼0.095 s−1. Two cobalt(iii) tetrazolato complexes have been synthesized and characterized. Noncovalent interactions have been analysed by DFT and MEP calculations and characterized using Bader's theory of AIM. Both complexes catalyze the aerial oxidation of 3,5-DTBC and OAPH.![]()
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Affiliation(s)
- Kousik Ghosh
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata
- India
| | - Abhisek Banerjee
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata
- India
| | - Antonio Bauzá
- Departament de Química
- Universitat de les IllesBalears
- 07122 Palma (Baleares)
- Spain
| | - Antonio Frontera
- Departament de Química
- Universitat de les IllesBalears
- 07122 Palma (Baleares)
- Spain
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21
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Mondal S, Chakraborty M, Mondal A, Pakhira B, Blake AJ, Sinn E, Chattopadhyay SK. Cu(ii) complexes of a tridentate N,N,O-donor Schiff base of pyridoxal: synthesis, X-ray structures, DNA-binding properties and catecholase activity. NEW J CHEM 2018. [DOI: 10.1039/c8nj00418h] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DNA binding and catecholase activities of two Cu(ii) complexes [Cu(L1)X] (X = N3, NCS) of pyridoxal derived ligands are reported.
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Affiliation(s)
- Satyajit Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Shibpur
- Howrah 711103
- India
| | - Moumita Chakraborty
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Shibpur
- Howrah 711103
- India
| | - Antu Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Shibpur
- Howrah 711103
- India
| | - Bholanath Pakhira
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Shibpur
- Howrah 711103
- India
| | - Alexander J. Blake
- School of Chemistry
- The University of Nottingham
- University Park
- Nottingham
- UK
| | - Ekkehard Sinn
- Chemistry Department
- Western Michigan University
- Kalamazoo
- USA
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22
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Synthesis, crystal structure, catecholase and phenoxazinone synthase activities of a mononuclear cobalt(III) complex containing in situ formed tridentate N-donor Schiff base. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.06.077] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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23
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Dasgupta S, Adhikary J, Giri S, Bauza A, Frontera A, Das D. Unveiling the effects of the in situ generated arene anion radical and imine radical on catecholase like activity: a DFT supported experimental investigation. Dalton Trans 2017; 46:5888-5900. [DOI: 10.1039/c7dt00733g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A comparative mechanistic account has been portrayed on the basis of arene anions and imine radicals in this study on catecholase activity.
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Affiliation(s)
| | - Jaydeep Adhikary
- Department of Chemistry
- University of Calcutta
- Kolkata – 700009
- India
| | - Sanjib Giri
- Department of Chemistry
- University of Calcutta
- Kolkata – 700009
- India
| | - Antonio Bauza
- Departament de Química
- Universitat de les Illes Balears
- Palma (Baleares)
- Spain
| | - Antonio Frontera
- Departament de Química
- Universitat de les Illes Balears
- Palma (Baleares)
- Spain
| | - Debasis Das
- Department of Chemistry
- University of Calcutta
- Kolkata – 700009
- India
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24
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Sanyal R, Ketkov S, Purkait S, Mautner FA, Zhigulin G, Das D. Nuclearity dependent solvent contribution to the catechol oxidase activity of novel copper(ii) complexes derived from Mannich-base ligand platforms: synthesis, crystal structure and mechanism. NEW J CHEM 2017. [DOI: 10.1039/c7nj00425g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solvent-dependent kinetic studies of the catecholase activity of a set of Cu(ii) complexes reveal alcoholysis and hydrolysis as the governing factors for kcat extrema.
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Affiliation(s)
- Ria Sanyal
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
- Department of Inorganic and Physical Chemistry
| | - Sergey Ketkov
- G.A. Razuvaev Institute of Organometallic Chemistry RAS
- 603950 Nizhny Novgorod
- Russian Federation
- N.I. Lobachevsky Nizhny Novgorod State University
- 603950 Nizhny Novgorod
| | | | - Franz A. Mautner
- Institut fuer Physikalische und Theoretische Chemie
- Technische Universitaet Graz
- A-8010 Graz
- Austria
| | - Grigory Zhigulin
- G.A. Razuvaev Institute of Organometallic Chemistry RAS
- 603950 Nizhny Novgorod
- Russian Federation
| | - Debasis Das
- Department of Chemistry
- University of Calcutta
- Kolkata 700 009
- India
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25
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Mandal A, Dasgupta S, Ganguly S, Bauzá A, Frontera A, Das D. Cooperative influence of pseudohalides and ligand backbone of Schiff-bases on nuclearity and stereochemistry of cobalt(iii) complexes: experimental and theoretical investigation. Dalton Trans 2017; 46:15257-15268. [DOI: 10.1039/c7dt03040a] [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
The ligand backbone effect of homologous Schiff-bases in combination with influences of SCN− and N3− is instrumental in controlling nuclearity and stereochemistry of catecholase active cobalt(iii) complexes.
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Affiliation(s)
- Arnab Mandal
- Department of Chemistry
- University of Calcutta
- Kolkata – 700009
- India
| | | | - Sumi Ganguly
- Department of Chemistry
- University of Calcutta
- Kolkata – 700009
- India
| | - Antonio Bauzá
- Departament de Química
- Universitat de les Illes Balears
- Palma
- Spain
| | - Antonio Frontera
- Departament de Química
- Universitat de les Illes Balears
- Palma
- Spain
| | - Debasis Das
- Department of Chemistry
- University of Calcutta
- Kolkata – 700009
- India
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