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Ressler AJ, Brandt ON, Weaver A, Poor JE, Ream A, Summers NA, McMillen CD, Seeram NP, Dougherty WG, Henry GE. Chromene-based Schiff Base Ligand: DNA Interaction Studies and Characterization of Tetranuclear Zinc, Nickel and Iron Complexes. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Strong proton transfer from phenolic ring to imine functionality in 1D azido and dicyanamido bridged Mn(II) coordination polymers: Synthesis, crystal structure and magnetic studies. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Cobalt(ɪɪ) and nickel(ɪɪ) bis(chelate) complexes with (N, O, O)-tridentate azomethine ligands: a quantum chemical study of stereoisomers with hexa-, penta-, and tetracoordinate central atoms. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3493-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Dilmen Portakal E, Kaya Y, Demirayak E, Karacan Yeldir E, Erçağ A, Kaya İ. Ni(II), Zn(II), and Fe(III) complexes derived from novel unsymmetrical salen-type ligands: preparation, characterization and some properties. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2070485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Eylem Dilmen Portakal
- Istanbul University-Cerrahpaşa, Faculty of Engineering, Department of Chemistry, Inorganic Chemistry Division, Istanbul, Turkey
| | - Yeliz Kaya
- Istanbul University-Cerrahpaşa, Faculty of Engineering, Department of Chemistry, Inorganic Chemistry Division, Istanbul, Turkey
| | - Emire Demirayak
- Istanbul University, Department of Chemistry, Inorganic Chemistry Division, Istanbul, Turkey
| | - Elif Karacan Yeldir
- Çanakkale Onsekiz Mart University, Faculty of Sciences and Arts, Department of Chemistry, Polymer Synthesis and Analysis Lab, Çanakkale, Turkey
| | - Ayşe Erçağ
- Istanbul University-Cerrahpaşa, Faculty of Engineering, Department of Chemistry, Inorganic Chemistry Division, Istanbul, Turkey
| | - İsmet Kaya
- Çanakkale Onsekiz Mart University, Faculty of Sciences and Arts, Department of Chemistry, Polymer Synthesis and Analysis Lab, Çanakkale, Turkey
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Turan N, Buldurun K, Türkan F, Aras A, Çolak N, Murahari M, Bursal E, Mantarcı A. Some metal chelates with Schiff base ligand: synthesis, structure elucidation, thermal behavior, XRD evaluation, antioxidant activity, enzyme inhibition, and molecular docking studies. Mol Divers 2021; 26:2459-2472. [PMID: 34743300 DOI: 10.1007/s11030-021-10344-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 10/18/2021] [Indexed: 11/30/2022]
Abstract
Schiff bases are well-known compounds for having significant biological properties. In this study, a new Schiff base ligand and its metal complexes were synthesized, and their antioxidant and enzyme inhibitory activities were evaluated. The new Schiff base ligand was synthesized with the condensation reaction of 6-tert-butyl 3-ethyl 2-amino-4,5-dihydrothieno[2,3-c]pyridine-3,6(7H)-dicarboxylate and 2-hydroxybenzaldehyde compounds. Fe(II), Co(II), and Ni(II) metal complexes of the novel Schiff base ligand were synthesized and characterized. The purity and molecular formula of the synthesized compounds were identified with elemental analysis, infrared, ultraviolet-visible, mass spectrophotometry, powder XRD, magnetic and thermal measurements. The Schiff base acted as a three dentate chelate. The analytical and spectroscopic data suggested an octahedral geometry for the complexes. The in vitro antioxidant method studies elucidated a more effective antioxidant character of the Schiff base ligand than its metal complexes but a less effective antioxidant potential than the standard antioxidant compounds. The enzyme inhibition potentials of the synthesized compounds for AChE, BChE, and GST enzymes were determined by in vitro enzyme activity methods. The Schiff base ligand was discovered to be the best inhibitor for the AChE and BChE with the values of 7.13 ± 0.84 µM and 5.75 ± 1.03 µM Ki, respectively. Moreover, the Fe(II) complex displayed the best Ki value as 9.37 ± 1.06 µM for the GST enzyme. Finally, molecular docking studies were carried out to see the structural interactions of the compounds. The metal complexes demonstrated better binding affinities with the AChE, BChE, and GST enzymes than the Schiff base ligand. This study identified a potential Schiff base molecule against both AChE and BChE targets to further investigate for in vivo and safety evaluation.
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Affiliation(s)
- Nevin Turan
- Department of Chemistry, Faculty of Arts and Sciences, Muş Alparslan University, 49250, Muş, Turkey.
| | - Kenan Buldurun
- Department of Food Processing, Technical Science Vocational School, Muş Alparslan University, 49250, Muş, Turkey
| | - Fikret Türkan
- Health Services Vocational School, Igdır University, 76000, Igdır, Turkey
| | - Abdulmelik Aras
- Department of Biochemistry, Faculty of Arts and Sciences, Igdır University, 76100, Igdır, Turkey
| | - Naki Çolak
- Department of Chemistry, Faculty of Arts and Sciences, Hitit University, 19100, Çorum, Turkey
| | - Manikanta Murahari
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, M.S. Ramaiah University of Applied Sciences, Bangalore, India
| | - Ercan Bursal
- Department of Nursing, Faculty of Health, Muş Alparslan University, 49250, Muş, Turkey
| | - Asim Mantarcı
- Department of Physics, Faculty of Arts and Sciences, Muş Alparslan University, 49250, Muş, Turkey
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Yaşar Ü, Gönül İ, Türkeş C, Demir Y, Beydemir Ş. Transition‐Metal Complexes of Bidentate Schiff‐Base Ligands: In Vitro and In Silico Evaluation as Non‐Classical Carbonic Anhydrase and Potential Acetylcholinesterase Inhibitors. ChemistrySelect 2021. [DOI: 10.1002/slct.202102082] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ümit Yaşar
- Department of Laboratory and Veterinary Health Nihat Delibalta Göle Vocational High School Ardahan University Ardahan 75700 Turkey
| | - İlyas Gönül
- Department of Chemistry Faculty of Arts and Science Cukurova University Adana 01330 Turkey
| | - Cüneyt Türkeş
- Department of Biochemistry Faculty of Pharmacy Erzincan Binali Yıldırım University Erzincan 24100 Turkey
| | - Yeliz Demir
- Department of Pharmacy Services Nihat Delibalta Göle Vocational High School Ardahan University Ardahan 75700 Turkey
| | - Şükrü Beydemir
- Department of Biochemistry Faculty of Pharmacy Anadolu University Eskişehir 26470 Turkey
- The Rectorate of Bilecik Şeyh Edebali University Bilecik 11230 Turkey
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Osman UM, Silvarajoo S, Kamarudin KH, Tahir MIM, Kwong HC. Ni(II) complex containing a thiosemicarbazone ligand: Synthesis, spectroscopy, single-crystal X-ray crystallographic and conductivity studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.128994] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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İlhan-Ceylan B. Oxovanadium(IV) and Nickel(II) complexes obtained from 2,2'-dihydroxybenzophenone-S-methyl-thiosemicarbazone: Synthesis, characterization, electrochemistry, and antioxidant capability. Inorganica Chim Acta 2020; 517:120186. [PMID: 33318715 PMCID: PMC7724315 DOI: 10.1016/j.ica.2020.120186] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 12/02/2020] [Accepted: 12/02/2020] [Indexed: 11/19/2022]
Abstract
2,2'-Dihydroxybenzophenone-S-methyl-thiosemicarbazone and 3-methoxy-salicylaldehyde were reacted in the presence of oxovanadium(IV) or nickel(II) ions to yield the N2O2-type-chelate complex. The synthesized complexes were characterized by employing elemental analysis, electronic and infrared spectra, 1H NMR spectra, magnetic measurements, and thermogravimetric analyses. The expected structures of oxovanadium(IV) and nickel(II) complexes were confirmed by using the single-crystal X-ray diffraction method. The presence of π-π stacked dimeric structures provided stronger crystalline formations. The optimized geometries and vibrational frequencies of the compounds were obtained using the DFT/ωB97XD method with the 6-31G (d,p) basis set and compared with the experimental data. The electrochemical characterization of the oxovanadium(IV) and nickel(II) complexes were carried out by using the cyclic voltammetry (CV) method. The oxovanadium(IV) complex gives a ligand-centered oxidation and a metal-centered one electron reduction and oxidation peaks corresponding to the VIV/IIIO and VIV/VO, respectively. The nickel(II) complex gives a ligand-centered oxidation and metal-centered (NiII/I) reduction peaks in a dimethyl sulfoxide (DMSO) solution. The redox potentials were calculated in terms of Gibbs free energy change of the redox reaction at the theory level of M06-L/LANL2DZ/PCM. In addition, the energy gap, HOMO and LUMO distributions were calculated. The total antioxidant capacities of the compounds were determined by using cupric reducing antioxidant capacity (CUPRAC) method, in which the oxovanadium(IV) complex was found to be powerful as an antioxidant agent.
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Affiliation(s)
- Berat İlhan-Ceylan
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, 34320, Avcılar, Istanbul, Turkey
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