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Mendieta A, Álvarez-Idaboy JR, Ugalde-Saldívar VM, Flores-Álamo M, Armenta A, Ferrer-Sueta G, Gasque L. Role of Imidazole and Chelate Ring Size in Copper Oxidation Catalysts: An Experimental and Theoretical Study. Inorg Chem 2023; 62:16677-16690. [PMID: 37792328 DOI: 10.1021/acs.inorgchem.3c01236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
In this work, the structural, solution, electrochemical, and catalytic properties of the complexes with ligands derived from imidazole and pyridines were studied. A comparative study of five bioinspired copper catalysts with or without coordinated imidazole and with different chelate ring sizes is presented. Catalytic efficiency on the oxidation of 3,5-di-tert-butylcatechol (DTBC) and ortho-aminophenol (OAP) in a MeOH/H2O medium was assessed by means of the Michaelis-Menten model. Catalysts comprising imidazole-containing ligands and/or a six-membered chelate ring proved to be more efficient in both oxidation reactions. Determination of stability constants and electrochemical parameters of the copper complexes supported the explanation of the catalytic behavior. A catalytic cycle similar for both reactions has been proposed. The results of density functional theory (DFT) free energy calculations for all five complexes and both catalytic reactions agree with the experimental results.
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Affiliation(s)
- Alan Mendieta
- Facultad de Química, Universidad Nacional Autónoma de México, Avenida Universidad 3000, CDMX 04510, México
| | - Juan Raúl Álvarez-Idaboy
- Facultad de Química, Universidad Nacional Autónoma de México, Avenida Universidad 3000, CDMX 04510, México
| | - Víctor M Ugalde-Saldívar
- Facultad de Química, Universidad Nacional Autónoma de México, Avenida Universidad 3000, CDMX 04510, México
| | - Marcos Flores-Álamo
- Facultad de Química, Universidad Nacional Autónoma de México, Avenida Universidad 3000, CDMX 04510, México
| | - Alfonso Armenta
- Facultad de Química, Universidad Nacional Autónoma de México, Avenida Universidad 3000, CDMX 04510, México
| | - Gerardo Ferrer-Sueta
- Laboratorio de Fisicoquímica Biológica, Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, UY 11400, Uruguay
| | - Laura Gasque
- Facultad de Química, Universidad Nacional Autónoma de México, Avenida Universidad 3000, CDMX 04510, México
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2
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Kim S, Ahn JH, Jeong DI, Yang M, Jeong JH, Choi YE, Kim HJ, Han Y, Karmakar M, Ko HJ, Cho HJ. Alum-tuned hyaluronic acid-based hydrogel with immune checkpoint inhibition for immunophoto therapy of cancer. J Control Release 2023; 362:1-18. [PMID: 37595669 DOI: 10.1016/j.jconrel.2023.08.027] [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: 04/30/2023] [Revised: 07/25/2023] [Accepted: 08/13/2023] [Indexed: 08/20/2023]
Abstract
Alum-crosslinked hyaluronic acid-dopamine (HD) hydrogel containing indocyanine green (ICG) with anti-programmed cell death-1 (PD-1) antibody (Ab) administration was developed for immunophoto therapy of cancer. Alum modulates the rheological characteristics of hydrogel for enabling syringe injection, shear-thinning feature, and slower biodegradation. In addition, alum in HD-based hydrogel provided CD8+ T cell-mediated immune responses for cancer therapy. ICG in the hydrogel under near-infrared (NIR) light exposure may induce hyperthermia and generate singlet oxygen for selective cancer cell killing. HD/alum/ICG hydrogel injection with NIR laser irradiation elevated PD-1 level in CD8+ T cells. Administration of PD-1 Ab aiming at highly expressed PD-1 in T cells may amplify the anticancer efficacies of HD/alum/ICG hydrogel along with NIR laser. HD/alum/ICG hydrogel with NIR light may have both CD8+ T cell-linked immune responses and ICG-related photodynamic/photothermal effects. Additional injection of immune checkpoint inhibitor can ultimately suppress primary and distant tumor growth by combination with those therapeutic actions.
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Affiliation(s)
- Sungyun Kim
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Jae-Hee Ahn
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Da In Jeong
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Mingyu Yang
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Jae-Hyeon Jeong
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Yeoung Eun Choi
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Hyun Jin Kim
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Youngjoo Han
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Mrinmoy Karmakar
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Hyun-Jeong Ko
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea; Kangwon Institute of Inclusive Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea.
| | - Hyun-Jong Cho
- Department of Pharmacy, College of Pharmacy, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea; Kangwon Institute of Inclusive Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea.
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Bouroumane N, El Boutaybi M, El Kodadi M, Touzani R, Oussaid A, Hammouti B, Abboud M. Synthesis of new heterocyclic ligands and study of the catecholase activity of catalysts based on copper(II). REACTION KINETICS MECHANISMS AND CATALYSIS 2023. [DOI: 10.1007/s11144-023-02370-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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Ganguly S, Bhunia P, Mayans J, Ghosh A. Trinuclear heterometallic CuII–MII (M = Mn and Co) complexes of N,O donor ligands with o-nitro benzoate anion: structures, magnetic properties and catalytic oxidase activities. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Hazari A, Dutta A. Catecholase like activity on heterometallic model complexes of Ni(II)-Mn(II) and Cu(II)-Mn(II) with N2O2 donor di-Schiff base ligands: A short review. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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New copper(II) μ-Alkoxo-μ-carboxylato double-bridged complexes as models for the active site of catechol oxidase: Synthesis, spectral characterization and DFT calculations. Heliyon 2022; 8:e09373. [PMID: 35592663 PMCID: PMC9113650 DOI: 10.1016/j.heliyon.2022.e09373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/16/2021] [Accepted: 04/29/2022] [Indexed: 11/24/2022] Open
Abstract
A series of four copper(II) μ-Alkoxo-μ-carboxylato double bridged complexes, [{Cu2(L)}2][(μ–O2C–CO2] 1, [{Cu2(L)}2(μ–O2C–(CH2)CO2] 2, [{Cu2(L)}2(μ–O2C–CH2–CO2] 3 and [{Cu2(L)}2(μ–O2C–C6H4–CO2] 4 (H3L = 4-bromo-2-((E)-((3-(((E)-5-chloro-2-hydroxybenzylidene) amino)-2-hydroxypropyl) imino) methyl)-6-methoxyphenol and μ-dicarboxylate ions = oxalate, malonate, succinate and terephthalate) have been synthesized and characterized using several physicochemical techniques. The tridentate nature of H3L is interpreted from IR spectra. The Epr spectra of these complexes are characteristic of the quintet state (S = 2) in central features and the triplet state (S = 1) of these tetranuclear complexes. The electrochemical potential of these complexes was investigated using CV (cyclic voltammetry) and DPV (differential pulse voltammetry). All complexes showed quasi reversible reduction peaks in the cathodic region. To explore the stability of these complexes, quantum chemical parameters like electronegativity, ionization potential, electron affinity, global hardness and softness, and electrophilicity were estimated and discussed. The synthesized complexes have been designed as structural and functional models of the catechol oxidase enzymes to investigate the catecholase activity. Additionally, superoxide dismutase activity data of all complexes have also been evaluated and compared with known SOD mimics.
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Biswas S, Karim S, Zangrando E, Chandra A. An effortless approach to synthesize two structurally diverse nano copper (II) materials and assessment of their apoptosis inducing ability on lung cancer cell line. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sneha Biswas
- Department of Chemistry University of Calcutta Kolkata India
| | - Suhana Karim
- Department of Chemistry University of Calcutta Kolkata India
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences University of Trieste Trieste Italy
| | - Arpita Chandra
- Department of in Vitro Carcinogenesis and Cellular Chemotherapy Chittaranjan National Cancer Institute Kolkata West Bengal India
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Ganguly S, Bhunia P, Mayans J, Ghosh A. Pentanuclear M II–Mn II (M = Ni and Cu) complexes of N 2O 2 donor ligands with a variation of carboxylate anions: syntheses, structures, magnetic properties and catecholase-like activities. NEW J CHEM 2022. [DOI: 10.1039/d2nj02215j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One NiII2MnII3 and two CuII2MnII3 complexes have been synthesized using N2O2 donor ligands. The former complex exhibits spin crossover at 2 K temperature. All the complexes exhibit catecholase-like activities.
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Affiliation(s)
- Sayantan Ganguly
- Department of Chemistry, University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
- Department of Chemistry, Taki Government College, Taki, Hasnabad, West Bengal 743429, India
| | - Pradip Bhunia
- Department of Chemistry, University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
| | - Júlia Mayans
- Departament de Química Inorgànica i Orgànica and Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona (UB), Martí iFranqués 1-11, Barcelona 08028, Spain
| | - Ashutosh Ghosh
- Department of Chemistry, University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, India
- Rani Rashmoni Green University, Tarakeswar, Hooghly 712410, West Bengal, India
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Zahirović A, Roca S, Višnjevac A, Kahrović E. Ruthenium organometallics of chloro-substituted 2′-hydroxychalcones – A story of catecholase biomimetics beyond copper. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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10
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Ganguly S, Mayans J, Ghosh A. Modulation of Nuclearity in Cu II -Mn II Complexes of a N 2 O 2 Donor Ligand Depending upon Carboxylate Anions: Structures, Magnetic Properties and Catalytic Oxidase Activities. Chem Asian J 2020; 15:4055-4069. [PMID: 32722886 DOI: 10.1002/asia.202000706] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/24/2020] [Indexed: 12/12/2022]
Abstract
Three new hetero-metallic copper(II)-manganese(II) complexes, [(CuL)2 Mn3 (C6 H5 CO2 )6 ] (1), [(CuL)2 Mn(CH3 CO2 )2 ] (2), and {[(CuL)2 Mn(C6 H5 CH2 CO2 )2 ] ⋅ 2CH3 CN} (3), have been synthesized using [CuL] as ''metalloligand'' (where H2 L=N,N'-bis(2-hydroxynaphthyl-methylidene)-1,3-propanediamine). Single-crystal structural analyses show an almost linear penta-nuclear structure for complex 1 where a square planar [CuL] unit is connected to each of the two terminal MnII ions of a linear, centrosymmetric [Mn3 (benzoate)6 ] unit through the double phenoxido bridges. Both complexes 2 and 3 possess a linear tri-nuclear structure where two terminal square-pyramidal [CuL] units are bonded to the central MnII ion through double phenoxido oxygen atoms along with a syn-syn bridging acetate (for 2)/phenyl acetate (for 3). All three complexes exhibit catecholase, and phenoxazinone synthase-like activities under aerial conditions. For catecholase like activity, the turnover numbers (kcat ) are 595, 40, and 205 h-1 whereas, for phenoxazinone synthase like activity, the turnover numbers are 25, 4, and 11 h-1 for complexes 1-3, respectively. The mechanism of both catalytic oxidase activities is proposed on the basis of mass spectral evidences. Variable-temperature (2-300 K) dc molar magnetic susceptibility measurements of 1 reveal antiferromagnetic interactions between the Cu-Mn centres (J1 =-29.3 cm-1 ), and also between the Mn-Mn centres of the [Mn3 (benzoate)6 ] unit (J2 =-0.68 cm-1 ). On increasing the magnetic field at 2 K, its ground spin state changes from S=3/2 to S=5/2 at 4 T, attributable to the low value of J2 which makes the excited spin states close in energy with the ground spin state. Complexes 2 and 3 show antiferromagnetic coupling interactions between the Cu-Mn pairs with J values of -9.51, and -5.32 cm-1 , respectively.
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Affiliation(s)
- Sayantan Ganguly
- Department of Chemistry, University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata, 700 009, India.,Department of Chemistry, Taki Government College, Taki, Hasnabad, West Bengal, 743429, India
| | - Júlia Mayans
- Instituto de Ciencia Molecular (ICMol), Universitat de València, c/ Catedrático José Beltrán 2, 46980 Paterna, València, Spain
| | - Ashutosh Ghosh
- Department of Chemistry, University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata, 700 009, India.,Rani Rashmoni Green University, Tarakeswar, Hooghly, 712419, West Bengal, India
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11
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Sagar S, Parween A, Mandal TK, Lewis W, Naskar S. Mn(IV), Co(II) and Ni(II) complexes of the Schiff bases of 2-hydroxy-naphthaldehyde with amino alcohols: synthesis, characterization and electrochemical study; DFT study and Catecholase activity of Mn(IV) complex. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1832657] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Shipra Sagar
- Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India
| | - Arfa Parween
- Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India
| | - Tarun K. Mandal
- Faculty Councils for PG studies, Vidyasagar University, Medinipur, West Bengal, India
| | - William Lewis
- School of Chemistry, University of Nottingham, Nottingham, UK
| | - Subhendu Naskar
- Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, India
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12
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Terán A, Jaafar A, Sánchez-Peláez AE, Torralba MC, Gutiérrez Á. Design and catalytic studies of structural and functional models of the catechol oxidase enzyme. J Biol Inorg Chem 2020; 25:671-683. [PMID: 32367388 DOI: 10.1007/s00775-020-01791-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/24/2020] [Indexed: 12/18/2022]
Abstract
The catechol oxidase activity of three copper/bicompartmental salen derivatives has been studied. One mononuclear, [CuL] (1), one homometallic, [Cu2L(NO3)2] (2), and one heterometallic, [CuMnL(NO3)2] (3) complexes were obtained using the ligand H2L = N,N'-bis(3-methoxysalicylidene)-1,3-propanediamine through different synthetic methods (electrochemical, chemical and solid state reaction). The structural data indicate that the metal ion disposition models the active site of type-3 copper enzymes, such as catechol oxidase. In this way, their ability to act as functional models of the enzyme has been spectrophotometrically determined by monitorization of the oxidation of 3,5-di-tert-butylcatechol (3,5-DTBC) to 3,5-di-tert-butyl-o-benzoquinone (3,5-DTBQ). All the complexes show significant catalytic activity with ratio constants (kobs) lying in the range (223-294) × 10-4 min-1. A thorough kinetic study was carried out for complexes 2 and 3, since they show structural similarities with the catechol oxidase enzyme. The greatest catalytic activity was found for the homonuclear dicopper compound (2) with a turnover value (kcat) of (3.89 ± 0.05) × 106 h-1, which it is the higher reported to date, comparable to the enzyme itself (8.25 × 106 h-1).
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Affiliation(s)
- Aarón Terán
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain.
| | - Aida Jaafar
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Ana E Sánchez-Peláez
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - M Carmen Torralba
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Ángel Gutiérrez
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
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Adam MSS, Abdel-Rahman LH, Abu-Dief AM, Hashem NA. Synthesis, catalysis, antimicrobial activity, and DNA interactions of new Cu(II)-Schiff base complexes. INORG NANO-MET CHEM 2019. [DOI: 10.1080/24701556.2019.1672735] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mohamed Shaker S. Adam
- Department of Chemistry, College of Science, King Faisal University, Al Hufuf, Saudi Arabia
- Chemistry Department, Faculty of Science, Sohag University, Sohag, Egypt
| | | | - Ahmed M. Abu-Dief
- Chemistry Department, Faculty of Science, Sohag University, Sohag, Egypt
| | - Nahla A. Hashem
- Chemistry Department, Faculty of Science, Sohag University, Sohag, Egypt
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14
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Characterizations of crystalline structure and catalytic activity of zwitterionic imidazole derivatives. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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15
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A highly selective and sensitive sensor with imine and phenyl-ethynyl-phenyl units for the visual and fluorescent detection of copper in water. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111893] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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16
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Li QQ, He PX, Zhang J, Zhang JD, Xin YM, Liu P, Wang YY, Li JL. Substituent changes in the salen ligands of Cu IINa I-complexes to induce various structures and catalytic activities towards 2-imidazolines from nitriles and 1,2-diaminopropane. Chem Commun (Camb) 2019; 55:4619-4622. [PMID: 30919878 DOI: 10.1039/c9cc00879a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on various comparable salen ligands, three synthesized CuIINaI-complexes present efficient catalytic activities for the coupling and cyclization reaction of 1,2-diaminopropane with nitriles towards 2-imidazolines. The catalytic results show that salen ligands with an electron-donating substituent and small steric hindrance improve the catalytic activity.
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Affiliation(s)
- Quan-Quan Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
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Sheoran M, Bhar K, Jain S, Rana M, Khan TA, Sharma AK. Phenoxo-bridged dicopper complexes: Syntheses, characterizations, crystal structures and catecholase activity. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Catalytic Oxidation of Benzyl Alcohol Using Nanosized Cu/Ni Schiff-Base Complexes and Their Metal Oxide Nanoparticles. Catalysts 2018. [DOI: 10.3390/catal8100452] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this work, nanosized Cu and Ni Schiff-base complexes, namely ahpvCu, ahpnbCu, and ahpvNi, incorporating imine ligands derived from the condensation of 2-amino-3-hydroxypyridine, with either 3-methoxysalicylaldehyde (ahpv) or 4-nitrobenzaldehyde (ahpnb), were synthesized using sonochemical approach. The structure and properties of the new ligands and their complexes with Ni(II) and Cu(II) were determined via infrared (IR), nuclear magnetic resonance (NMR), electronic spectra (UV-Vis), elemental analysis (CHN), thermal gravimetric analysis (TGA), molar conductivity (Λm), and magnetic moment (μeff). The combined results revealed the formation of 1:1 (metal: ligand) complexes for ahpvCu and ahpvNi and 1:2 for ahpnbCu. Additionally, CuO and NiO nanoparticles were prepared by calcination of the respective nanosized Cu/Ni complexes at 500 °C, and characterized by powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). Significantly, the as-prepared nanosized Schiff-base Cu/Ni complexes and their oxides showed remarkable catalytic activity towards the selective oxidation of benzyl alcohol (BzOH) in aqueous H2O2/ dimethylsulfoxide (DMSO) solution. Thus, catalytic oxidation of BzOH to benzaldehyde (BzH) using both ahpvCu complex and CuO nanoparticles in H2O2/DMSO media at 70 °C for 2 h yielded 94% and 98% BzH, respectively, with 100% selectivity.
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Das K, Dolai S, Vojtíšek P, Manna SC. Protein binding, DFT/TDDFT calculation and catecholase activity of five coordinated distorted square pyramidal/trigonal bipyramidal Cu(II) complexes. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.04.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Singh O, Maji A, Singh UP, Ghosh K. Water-Soluble Copper Complex Derived from Ligand TETA TAHaving NNN Donors: Studies on Rapid Degradation of Organic Dyes, Catecholase and Phenoxazinone Synthase Activities. ChemistrySelect 2018. [DOI: 10.1002/slct.201800045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Ovender Singh
- Department of Chemistry; IIT Roorkee; Roorkee - 247667, Uttarakhand India
| | - Ankur Maji
- Department of Chemistry; IIT Roorkee; Roorkee - 247667, Uttarakhand India
| | - Udai P. Singh
- Department of Chemistry; IIT Roorkee; Roorkee - 247667, Uttarakhand India
| | - Kaushik Ghosh
- Department of Chemistry; IIT Roorkee; Roorkee - 247667, Uttarakhand India
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Das M, Kumar Kundu B, Tiwari R, Mandal P, Nayak D, Ganguly R, Mukhopadhyay S. Investigation on chemical protease, nuclease and catecholase activity of two copper complexes with flexidentate Schiff base ligands. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Ferraresso L, de Arruda E, de Moraes T, Fazzi R, Da Costa Ferreira A, Abbehausen C. Copper(II) and zinc(II) dinuclear enzymes model compounds: The nature of the metal ion in the biological function. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.08.095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Gülzow J, Hörner G, Strauch P, Stritt A, Irran E, Grohmann A. Oxygen Delivery as a Limiting Factor in Modelling Dicopper(II) Oxidase Reactivity. Chemistry 2017; 23:7009-7023. [PMID: 28094884 DOI: 10.1002/chem.201605868] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Indexed: 11/10/2022]
Abstract
Deprotonation of ligand-appended alkoxyl groups in mononuclear copper(II) complexes of N,O ligands L1 and L2 , gave dinuclear complexes sharing symmetrical Cu2 O2 cores. Molecular structures of these mono- and binuclear complexes have been characterized by XRD, and their electronic structures by UV/Vis, 1 H NMR, EPR and DFT; moreover, catalytic performance as models of catechol oxidase was studied. The binuclear complexes with anti-ferromagnetically coupled copper(II) centers are moderately active in quinone formation from 3,5-di-tert-butyl-catechol under the established conditions of oxygen saturation, but are strongly activated when additional dioxygen is administered during catalytic turnover. This unforeseen and unprecedented effect is attributed to increased maximum reaction rates vmax , whereas the substrate affinity KM remains unaffected. Oxygen administration is capable of (partially) removing limitations to turnover caused by product inhibition. Because product inhibition is generally accepted to be a major limitation of catechol oxidase models, we think that our observations will be applicable more widely.
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Affiliation(s)
- Jana Gülzow
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Gerald Hörner
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Peter Strauch
- Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476, Potsdam-Golm, Germany
| | - Anika Stritt
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Elisabeth Irran
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Andreas Grohmann
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
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24
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Mahapatra P, Ghosh S, Giri S, Rane V, Kadam R, Drew MGB, Ghosh A. Subtle Structural Changes in (CuIIL)2MnII Complexes To Induce Heterometallic Cooperative Catalytic Oxidase Activities on Phenolic Substrates (H2L = Salen Type Unsymmetrical Schiff Base). Inorg Chem 2017; 56:5105-5121. [DOI: 10.1021/acs.inorgchem.7b00253] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Prithwish Mahapatra
- Department of Chemistry,
University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Soumavo Ghosh
- Department of Chemistry,
University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Sanjib Giri
- Department of Chemistry,
University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Vinayak Rane
- Radiochemistry division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
| | - Ramakant Kadam
- Radiochemistry division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India
| | - Michael G. B. Drew
- School of Chemistry, The University of Reading, P.O. Box 224, Whiteknights, Reading RG6 6AD, U.K
| | - Ashutosh Ghosh
- Department of Chemistry,
University College of Science, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
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25
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Hamann JN, Herzigkeit B, Jurgeleit R, Tuczek F. Small-molecule models of tyrosinase: From ligand hydroxylation to catalytic monooxygenation of external substrates. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.07.009] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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26
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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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27
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Novel bioinspired acetato-bridged dinuclear nickel(II)-Schiff-base complex: Catechol oxidase and in vitro biological activity studies. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.08.047] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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28
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Das M, Mandal P, Malviya N, Choudhuri I, Charmier MAJ, Morgado S, Mobin SM, Pathak B, Mukhopadhyay S. Copper complexes with a flexible piperazinyl arm: nuclearity driven catecholase activity and interactions with biomolecules. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1236193] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Mriganka Das
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Poulami Mandal
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Novina Malviya
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Indrani Choudhuri
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Maria Adilia Januário Charmier
- Faculty of Engineering, Universidade Lusófona, Lisbon, Portugal
- CQE, Instituto Superior Técnico-Universidade de Lisboa (IST-UL), Lisbon, Portugal
| | - Susana Morgado
- Faculty of Engineering, Universidade Lusófona, Lisbon, Portugal
| | - Shaikh M. Mobin
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Biswarup Pathak
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
| | - Suman Mukhopadhyay
- Department of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Indore, India
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29
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Abdel-Rahman LH, Abu-Dief AM, Adam MSS, Hamdan SK. Some New Nano-sized Mononuclear Cu(II) Schiff Base Complexes: Design, Characterization, Molecular Modeling and Catalytic Potentials in Benzyl Alcohol Oxidation. Catal Letters 2016. [DOI: 10.1007/s10562-016-1755-0] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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30
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Catechol oxidase and phenoxazinone synthase: Biomimetic functional models and mechanistic studies. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.11.002] [Citation(s) in RCA: 170] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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31
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Sanyal R, Kundu P, Rychagova E, Zhigulin G, Ketkov S, Ghosh B, Chattopadhyay SK, Zangrando E, Das D. Catecholase activity of Mannich-based dinuclear CuII complexes with theoretical modeling: new insight into the solvent role in the catalytic cycle. NEW J CHEM 2016. [DOI: 10.1039/c6nj00105j] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Catecholase activity has been explored by combined experimental and theoretical approaches using di-copper(ii) complexes of Mannich-base ligands.
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Affiliation(s)
- Ria Sanyal
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
| | - Priyanka Kundu
- Department of Chemistry
- University of Calcutta
- Kolkata 700009
- India
| | - Elena Rychagova
- G. A. Razuvaev Institute of Organometallic Chemistry RAS
- 603950 Nizhny Novgorod
- Russian Federation
- N. I. Lobachevsky Nizhny Novgorod State University
- 603950 Nizhny Novgorod
| | - Grigory Zhigulin
- G. A. Razuvaev Institute of Organometallic Chemistry RAS
- 603950 Nizhny Novgorod
- Russian Federation
| | - 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
| | - Bipinbihari Ghosh
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah 711103
- 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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32
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Dey SK, Mukherjee A. Investigation of 3d-transition metal acetates in the oxidation of substituted dioxolene and phenols. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.06.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Bis-chelated-(3-methoxy-2-oxo-benzaldehyde)–copper(II) complex: Synthesis, crystal structure, fluorescence property, DFT calculation, and catecholase activity. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.11.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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34
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Dey SK, Mukherjee A. Manganese(III) acetate mediated catalytic oxidation of substituted dioxolene and phenols. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.08.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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35
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Patra A, Giri GC, Sen TK, Carrella L, Mandal SK, Bera M. Bis(μ-alkoxo) bridged dinuclear CuII2 and ZnII2 complexes of an isoindol functionality based new ligand: Synthesis, structure, spectral characterization, magnetic properties and catechol oxidase activity. Polyhedron 2014. [DOI: 10.1016/j.poly.2013.09.034] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Adhikary J, Chakraborty P, Das S, Chattopadhyay T, Bauzá A, Chattopadhyay SK, Ghosh B, Mautner FA, Frontera A, Das D. A Combined Experimental and Theoretical Investigation on the Role of Halide Ligands on the Catecholase-like Activity of Mononuclear Nickel(II) Complexes with a Phenol-Based Tridentate Ligand. Inorg Chem 2013; 52:13442-52. [DOI: 10.1021/ic401819t] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jaydeep Adhikary
- Department of Chemistry, University of Calcutta, 92 A.P.C.
Road, Kolkata 700 009, India
| | - Prateeti Chakraborty
- Department of Chemistry, University of Calcutta, 92 A.P.C.
Road, Kolkata 700 009, India
| | - Sudhanshu Das
- Department of Chemistry, University of Calcutta, 92 A.P.C.
Road, Kolkata 700 009, India
| | - Tanmay Chattopadhyay
- Department of Chemistry, Panchakot Mahavidyalaya, Sarbari, Purulia,
Pin 723121, India
| | - Antonio Bauzá
- Departament
de Química, Universitat de les Illes Balears, Crta. de Valldemossa
km 7.5, 07122 Palma
(Baleares), Spain
| | | | - Bipinbihari Ghosh
- Department of Chemistry, Bengal Engineering and Science University, Howrah 711 103, India
| | - Franz A. Mautner
- Institut fuer Physikalische und Theoretische
Chemie, Technische Universitaet Graz, 8010 Graz, Austria
| | - Antonio Frontera
- Departament
de Química, Universitat de les Illes Balears, Crta. de Valldemossa
km 7.5, 07122 Palma
(Baleares), Spain
| | - Debasis Das
- Department of Chemistry, University of Calcutta, 92 A.P.C.
Road, Kolkata 700 009, India
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37
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Allen SE, Walvoord RR, Padilla-Salinas R, Kozlowski MC. Aerobic copper-catalyzed organic reactions. Chem Rev 2013; 113:6234-458. [PMID: 23786461 PMCID: PMC3818381 DOI: 10.1021/cr300527g] [Citation(s) in RCA: 1227] [Impact Index Per Article: 111.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Scott E. Allen
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Ryan R. Walvoord
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Rosaura Padilla-Salinas
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Marisa C. Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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38
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Study of the histamine copper(II) chloride complex catalytic activity. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-013-1314-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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39
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Guha A, Banu KS, Das S, Chattopadhyay T, Sanyal R, Zangrando E, Das D. A series of mononuclear nickel(II) complexes of Schiff-base ligands having N,N,O- and N,N,N-donor sites: Syntheses, crystal structures, solid state thermal property and catecholase-like activity. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.07.088] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Biswas A, Das LK, Drew MGB, Aromí G, Gamez P, Ghosh A. Synthesis, Crystal Structures, Magnetic Properties and Catecholase Activity of Double Phenoxido-Bridged Penta-Coordinated Dinuclear Nickel(II) Complexes Derived from Reduced Schiff-Base Ligands: Mechanistic Inference of Catecholase Activity. Inorg Chem 2012; 51:7993-8001. [DOI: 10.1021/ic202748m] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Apurba Biswas
- Department
of Chemistry, University
College of Science, University of Calcutta, 92 APC Road, Kolkata 700 009, India
| | - Lakshmi Kanta Das
- Department
of Chemistry, University
College of Science, University of Calcutta, 92 APC Road, Kolkata 700 009, India
| | - Michael G. B. Drew
- School of Chemistry, The University of Reading, P.O BOX 224, Whiteknights,
Reading RG 66AD, United Kingdom
| | - Guillem Aromí
- Departament de Química
Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Patrick Gamez
- Departament de Química
Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08010 Barcelona, Spain
| | - Ashutosh Ghosh
- Department
of Chemistry, University
College of Science, University of Calcutta, 92 APC Road, Kolkata 700 009, India
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41
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Silavi R, Divsalar A, Saboury AA. A short review on the structure-function relationship of artificial catecholase/tyrosinase and nuclease activities of Cu-complexes. J Biomol Struct Dyn 2012; 30:752-72. [PMID: 22731989 DOI: 10.1080/07391102.2012.689704] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The synthesis of metal complexes has vastly increased the scope of research for many scientists during the two last decades. Among these compounds, artificial tyrosinases, catecholases, proteases, and nucleases are some of the most studied due to their importance as modern tools in the fields of medicine, scientific research, and industry. Transition metals such as Zn(2+), Cu(2+), Fe(3+), Co(3+), Ni(2+), and lanthanide ions are the most commonly used. Among these ions, copper complexes have been the focus of the majority of studies thanks to their significant activity in comparison with other ions. Studies of copper-based tyrosinases, catecholases, and nucleases have revealed some of the overarching factors affecting reactions of all three types, which has led to improved activity and efficiency for all. Key factors include proper core-core distance, (Cu⋯Cu distance 2.90-2.99 Å), suitable solvent, and ligands with proper hydrophobic structure and geometry. In the present investigation, we review and introduce the proposed mechanisms and the kinetically effective factors of natural catecholase, tyrosinase, and nuclease and their Cu-based synthetic mimics.
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Affiliation(s)
- Reza Silavi
- Department of Biological Sciences, Kharazmi (Tarbiat Moallem) University, Tehran, Iran
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42
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Lu L, Song Y, Liu H, Zhang J. Synthesis, characterization, and polyphenol oxidase activity of CuII, MnII, and FeIII complexes with a N2O2 ligand. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.671480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Lijun Lu
- a State Key Laboratory of Bioreactor Engineering, Department of Pharmaceutical Sciences , School of Pharmacy, East China University of Science & Technology , Shanghai 200237 , P.R. China
| | - Yanying Song
- a State Key Laboratory of Bioreactor Engineering, Department of Pharmaceutical Sciences , School of Pharmacy, East China University of Science & Technology , Shanghai 200237 , P.R. China
| | - Hui Liu
- a State Key Laboratory of Bioreactor Engineering, Department of Pharmaceutical Sciences , School of Pharmacy, East China University of Science & Technology , Shanghai 200237 , P.R. China
| | - Jingyan Zhang
- a State Key Laboratory of Bioreactor Engineering, Department of Pharmaceutical Sciences , School of Pharmacy, East China University of Science & Technology , Shanghai 200237 , P.R. China
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43
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Seth P, Das LK, Drew MGB, Ghosh A. Synthesis, Crystal Structure, and Catecholase Activity of Three Trinuclear Heterometallic NiII2-MnII Complexes Derived from a Salen-Type Schiff Base Ligand. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101309] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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44
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Marion R, Saleh NM, Le Poul N, Floner D, Lavastre O, Geneste F. Rate enhancement of the catechol oxidase activity of a series of biomimetic monocopper(ii) complexes by introduction of non-coordinating groups in N-tripodal ligands. NEW J CHEM 2012. [DOI: 10.1039/c2nj40265c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Das S, Maiti P, Ghosh T, Zangrando E, Das D. Dinickel(II) complex of N, N′-propylenebis(3-formyl-5-tert-butylsalicylaldimine): X-ray structural characterization and bio-relevant catalytic activity. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2011.10.041] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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46
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Characterization and catechole oxidase activity of a family of copper complexes coordinated by tripodal pyrazole-based ligands. J Inorg Biochem 2011; 105:1391-7. [PMID: 21946439 DOI: 10.1016/j.jinorgbio.2011.07.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 07/25/2011] [Accepted: 07/26/2011] [Indexed: 11/22/2022]
Abstract
A family of tripodal pyrazole-based ligands has been synthesized by a condensation reaction between 1-hydroxypyrazoles and aminoalcohols. The diversity was introduced both on the substituents of the pyrazole ring and on the side chain. The corresponding copper(II) complexes have been prepared by reaction with CuCl(2) in tetrahydrofuran. They have been characterized by EPR, UV spectroscopy and cyclic voltammetry. The absence of the half-field splitting signals in EPR suggests that the complex exists in solution as mononuclear species. The influence of substituents and side chain of the tripodal ligand on the catecholase activity of the complexes was studied. The reaction rate depends on two factors. First, the presence of an oxygen atom in the third position of the side chain should be avoided to keep the effectiveness of the reaction. Second, the electronic and steric effects of substituents on the pyrazole ring strongly affect the catalytic activity of the complex. Thus, best results were obtained with complexes containing unsubstituted pyrazole based-ligands. Kinetic investigations with the best catalyst based on the Michaelis-Menten model show that the catalytic activity of the mononuclear complex is close to that of some dicopper complexes described in literature.
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