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Menon LV, Manoj E. Copper perchlorate catalyzed oxidative cyclisation of a novel bishydrazone ligand, formation of an unusual copper complex and in vitro biological implications. J Inorg Biochem 2024; 255:112538. [PMID: 38547785 DOI: 10.1016/j.jinorgbio.2024.112538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/10/2024] [Accepted: 03/21/2024] [Indexed: 04/16/2024]
Abstract
A novel hexadentate bishydrazone ligand, 1,10-bis(di(2-pyridyl)ketone) adipic acid dihydrazone (H2L1) is synthesized and characterized. With copper perchlorate as a catalytic oxidant, the ligand undergoes oxidative cyclisation and resulted in the formation of an unusual copper complex [Cu(L1a)2Cl]ClO4 (1), where L1a is 3-(2-pyridyl)triazolo[1,5-a]-pyridine. The Cu(II) complex was characterized physicochemically, while the molecular structure was confirmed by single crystal X- ray diffraction. In the complex cation, copper(II) is in a distorted trigonal bipyramidal coordination environment, surrounded by two triazolo nitrogen atoms and two pyridyl nitrogen atoms of L1a and a chloride atom. The relevant non covalent intermolecular interactions of the complex quantified using Hirshfeld surface analysis reveals that the O···H/ H···O (27.2%) contacts has the highest contribution. The solution phase bandgaps of the compounds were calculated using Tauc plot, whereas the solid-state band gaps were calculated by Kubelka-Munk model. DFT studies of the compounds indicate that the theoretical calculations corroborate with the experimental data. DPPH antioxidant activity assay of the synthesized compounds showed that the proligand H2L1 has a lower IC50 value (24.1 μM) than that of complex 1 (29.7 μM). The in vitro antibacterial activity was evaluated against Escherichia coli and Staphylococcus aureus, which revealed that complex 1 have excellent activity against E. coli, much as the standard ciprofloxacin. The cytotoxic efficacy investigation of the compounds against A549 (lung) adenocarcinoma cells suggested that H2L1 has more anticancer activity (IC50 value of 149.08 μM) than that of complex 1(IC50 value of 176.70 μM).
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Affiliation(s)
- Lakshmi V Menon
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, Kerala 682 022, India
| | - E Manoj
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi, Kerala 682 022, India.
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Mureseanu M, Bleotu I, Spînu CI, Cioatera N. Anchoring of Copper(II)-Schiff Base Complex in SBA-15 Matrix as Efficient Oxidation and Biomimetic Catalyst. Int J Mol Sci 2024; 25:1094. [PMID: 38256167 PMCID: PMC10816232 DOI: 10.3390/ijms25021094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024] Open
Abstract
A new mononuclear Cu(II) complex [Cu(L2)(H2O)2], where L is the Schiff base 2-[2-(3-bromopropoxy)benzylideneamino] benzoic acid, was synthesized and covalently anchored onto an amino-functionalized SBA-15 mesoporous silica in order to obtain an efficient heterogeneous catalyst. The elemental, structural, textural and morphological characterization confirmed the coordination of the central Cu(II) ion with two ligands and two H2O molecules in the synthesized complex and its successful immobilization into the inner pore surface of the NH2-functionalized support without the loss of the mesoporous structure. The catalytic activity of the free or immobilized Cu(II) complex was tested in the oxidation of cyclohexene with H2O2 under an air atmosphere and the dismutation reaction of the superoxide radical anions with very good results. In addition, catalyst reuse tests claim its suitability in alkene oxidation processes or as a biomimetic catalyst.
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Affiliation(s)
- Mihaela Mureseanu
- Department of Chemistry, University of Craiova, 107 I Calea Bucureşti, 200478 Craiova, Romania; (M.M.); (C.-I.S.)
| | - Irina Bleotu
- Faculty of Chemical Engineering and Environmental Protection, Technical University of Iasi, 71 D. Mangeron, 700050 Iasi, Romania;
| | - Cezar-Ionuț Spînu
- Department of Chemistry, University of Craiova, 107 I Calea Bucureşti, 200478 Craiova, Romania; (M.M.); (C.-I.S.)
| | - Nicoleta Cioatera
- Department of Chemistry, University of Craiova, 107 I Calea Bucureşti, 200478 Craiova, Romania; (M.M.); (C.-I.S.)
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Cortés P, Castroagudín M, Kesternich V, Pérez-Fehrmann M, Carmona E, Zaragoza G, Vizcarra A, Hernández-Saravia LP, Nelson R. Ligand influence in electrocatalytic properties of Cu(II) triazole complexes for hydrogen peroxide detection in aqueous media. Dalton Trans 2023; 52:1476-1486. [PMID: 36645272 DOI: 10.1039/d2dt03549a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In this work, electrocatalytic changes of Cu(II) triazole complexes (Cu(L)2) resulting from inductive effects were evaluated to fabricate a sensor for hydrogen peroxide (H2O2) determination. Three copper(II) complexes with electronically differentiated ligands were synthesized by slow diffusion method and characterized by X-ray crystallography, Fourier transformed infrared (FTIR), UV-Vis, scanning electron microscopy (SEM) and voltammetry cyclic (CV). Cu(LOMe)2/GC, Cu(LBr)2/GC and Cu(LNO2)2/GC sensors were then prepared. Under optimal conditions (pH = 11), the optimal sensor presented a response at -0.5 V, good linear range of 1-32 μM, reproducibility (1.7%), repeatability (1.2%), LOD of 0.0246 μM (S/N = 5), LOQ of 0.0747 μM (S/N = 5) and selectivity. Additionally, Cu(LNO2)2/GC sensor has been successfully applied in commercial substances, such as mouthwash, milk and tea.
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Affiliation(s)
- Paula Cortés
- Departamento de Química, Facultad de Ciencias, Universidad Católica del Norte, Avda. Angamos 0610, Antofagasta 1270709, Chile.
| | - Mariña Castroagudín
- Departamento de Química, Facultad de Ciencias, Universidad Católica del Norte, Avda. Angamos 0610, Antofagasta 1270709, Chile.
| | - Víctor Kesternich
- Departamento de Química, Facultad de Ciencias, Universidad Católica del Norte, Avda. Angamos 0610, Antofagasta 1270709, Chile.
| | - Marcia Pérez-Fehrmann
- Departamento de Química, Facultad de Ciencias, Universidad Católica del Norte, Avda. Angamos 0610, Antofagasta 1270709, Chile.
| | - Erico Carmona
- Facultad de Recursos Naturales Renovables, Universidad Arturo Prat, Iquique, Chile
| | - Guillermo Zaragoza
- Unidade de Difracción de Raios X, RIAIDT, Universidade de Santiago de Compostela, Campus VIDA, Santiago de Compostela 15782, Spain
| | - Arnoldo Vizcarra
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Chile.
| | | | - Ronald Nelson
- Departamento de Química, Facultad de Ciencias, Universidad Católica del Norte, Avda. Angamos 0610, Antofagasta 1270709, Chile.
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Roy S, Banerjee A, Lima S, Horn Jr A, Sampaio RMSN, Ribeiro N, Correia I, Avecilla F, Carvalho MFNN, Kuznetsov ML, Pessoa JC, Kaminsky W, Dinda R. Unusual chemistry of Cu(ii) salan complexes: synthesis, characterization and superoxide dismutase activity. NEW J CHEM 2020. [DOI: 10.1039/d0nj01892a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cu(ii)-salan complexes: structural and spectral characterization, solvent assisted ring cleavage and correlation of superoxide dismutase activity with cyclic voltammetry data and steric effects.
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Khoshroo M, Hosseini-Monfared H. Oxidation of Sulfides with H2O2 Catalyzed by Impregnated Graphene Oxide with Co–Cu–Zn Doped Fe3O4/Co3O4–MoO3 Nanocomposite in Acetonitrile. J Inorg Organomet Polym Mater 2016. [DOI: 10.1007/s10904-016-0459-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Abbasi V, Hosseini-Monfared H, Hosseini SM. Mn(III)-salan/graphene oxide/magnetite nanocomposite as a highly selective catalyst for aerobic epoxidation of olefins. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3554] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Vahideh Abbasi
- Department of Chemistry; University of Zanjan; 45195-313 Zanjan Iran
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