Articles written in Journal of Chemical Sciences
Volume 127 Issue 4 April 2015 pp 649-661 Regular Articles
Dhananjay Dey Arnab Basu Roy Anandan Ranjani Loganathan Gayathri Saravanan Chandraleka Dharumadurai Dhanasekaran Mohammad Abdulkader Akbarsha Chung-Yu Shen Hui-Lien Tsai Milan Maji Niranjan Kole Bhaskar Biswas
We have synthesized two isostructural mononuclear cobalt(III) complexes [
Volume 128 Issue 11 November 2016 pp 1775-1782 Regular Article
An unprecedented solid of coper(II) complexes [Cu(dpa)₂NCS]₂[Cu(dpa)₂(NCS)₂](ClO₄)₂ (1) [dpa = 2,2'-dipyridylamine; SCN = thiocyanate], has been synthesized and crystallographically characterized with the aim to study the catecholase activity. The Cu(II) complex mimics the full catalytic cycle of the active site of catechol oxidase enzyme in acetonitrile medium with a turnover number of 4.788 × 10³ h⁻¹ along with the production of semiquinone radical and hydrogen peroxide. In situ generation of Cu(I) species in the catalytic pathway of catechol oxidation was established by electrochemical study and further confirmed by electron paramagnetic resonance (EPR) spectroscopy.
Volume 129 Issue 10 October 2017 pp 1513-1520 REGULAR ARTICLE
A mononuclear cobalt(II) complex, [Co(phen) ₂Cl ₂], (phen = 1,10-phenanthroline) has been synthesized and structurally characterized by different spectroscopic methods including single crystal X-ray structural study.X-ray crystal structural analysis revealed that the cobalt(II) complex crystallizes in amonoclinicsystem with C2/c space group and exists in cis-configuration in its crystalline state. Room temperature magnetic measurement accounts for 3e paramagnetism and indicates high spin cobalt(II) in the solid state. The cobalt(II) complex has been evaluated as a functional model for phosphatase enzyme by using 4-nitrophenylphosphate (PNPP) as a standard substrate in aqueous DMF medium. This mononuclear cobalt(II) complex exhibits good hydrolytic phosphoester cleavage efficiency with kcat value of 3.78 × 10 ²h ⁻¹.
Volume 130 Issue 3 March 2018 Article ID 0026
In this work, we have synthesised and crystallographically characterized a mononuclear iron(II) complex, [Fe(phen)3](NO3)2 ·2H2O (1) (phen = 1,10-phenanthroline). Single crystal X-ray diffraction (SXRD) analysis revealed that 1 crystallizes in monoclinic system with P 1− space group. The lattice water molecules in 1 form a water-nitrate cluster, (H2O)2... (NO3)2 through strong H-bonding interaction mediated via iron(II) complex in a unique binding motif and provide additional stability to the compound in the solid state. This iron(II)complex is able to catalyze the cleavage of aromatic C-C linkage of 2,5-dihydroxybenzoic acid (Gentisic acid, GA) in oxygen environment. The iron(II) complex in the presence of two equivalent of triethylamine (Et3N) binds with GA stoichiometrically in acetonitrile medium at 25◦ C. Observation of GA-to-iron LMCT optical bands at 521 and 609 nm supports
Volume 134, 2022
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