Electrochemical studies of Ruthenium (III) complexes derived from chitosan Schiff base ligands

IF 2.4 3区化学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY

Carbohydrate Research Pub Date : 2025-05-26 DOI:10.1016/j.carres.2025.109557

T. Vadivel , S. Kulathooran , S. Chandrasekaran , S. Ilayaraja , R. Benjamin

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引用次数: 0

Abstract

The biocompatible nature of the chitosan biopolymer enables it to facilitate a wide range of organic transformations including chemical modification with some carbonyl compounds. Transition metal complexes namely [Ru(CS)4hy3mbd)(H₂O)₂].Cl_2, [Ru(CS)2hybd)(H₂O)₂].Cl₂, and [Ru(CS)2hy3mbd)(H₂O)₂].Cl₂ were synthesized by a complexation of bidentate Schiff base ligands which contains nitrogen and oxygen donor atoms. The nitrogen atom of azomethine linkage and the oxygen atom of aromatic aldehydes are the active sites for complexation reactions to form stable coordination complexes with ruthenium metal ions. The electronic transitions of ruthenium (III) complexes were studied by UV–Vis spectroscopy. The functional groups analysis were performed with FT-IR spectrum. The electronic structure and hyperfine splitting pattern of the metal complexes were discussed with ESR spectral data. The proton environment of the complex molecules were studied by 1H NMR spectroscopy. The stable complexes have shown a good crystalline nature which are characterized by powder XRD. Thermal stability of complexes was studied by Thermo-gravimetry analysis. The electrochemical property of ruthenium metal complexes were discussed with cyclic voltammogram and this study helps to distinguish reversible, quasi reversible redox properties of the metal complexes derived from biopolymer based Schiff base ligands.

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壳聚糖席夫碱配体钌（III）配合物的电化学研究

壳聚糖生物聚合物的生物相容性使其能够促进广泛的有机转化，包括与一些羰基化合物的化学改性。过渡金属配合物即[Ru(CS)4hy3mbd)(H2O)2]。这有点难度,[俄文(CS) 2 hybd) (H2O) 2]。和[Ru(CS)2hy3mbd)(H2O)2]。用含氮、氧给体的双齿席夫碱配体络合合成了Cl2。偶亚甲基键的氮原子和芳醛的氧原子是络合反应的活性位点，与金属钌离子形成稳定的配位配合物。用紫外-可见光谱法研究了钌（III）配合物的电子跃迁。用FT-IR光谱分析其官能团。用ESR光谱分析了金属配合物的电子结构和超细分裂模式。用核磁共振氢谱法研究了复合分子的质子环境。这些稳定的配合物表现出良好的结晶性，并用粉末XRD对其进行了表征。用热重分析法研究了配合物的热稳定性。用循环伏安法研究了钌金属配合物的电化学性质，有助于区分生物聚合物基席夫碱配体衍生的金属配合物的可逆和准可逆氧化还原性质。

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来源期刊

Carbohydrate Research 化学-生化与分子生物学

CiteScore

5.00

自引率

3.20%

发文量

183

审稿时长

3.6 weeks

期刊介绍： Carbohydrate Research publishes reports of original research in the following areas of carbohydrate science: action of enzymes, analytical chemistry, biochemistry (biosynthesis, degradation, structural and functional biochemistry, conformation, molecular recognition, enzyme mechanisms, carbohydrate-processing enzymes, including glycosidases and glycosyltransferases), chemical synthesis, isolation of natural products, physicochemical studies, reactions and their mechanisms, the study of structures and stereochemistry, and technological aspects. Papers on polysaccharides should have a "molecular" component; that is a paper on new or modified polysaccharides should include structural information and characterization in addition to the usual studies of rheological properties and the like. A paper on a new, naturally occurring polysaccharide should include structural information, defining monosaccharide components and linkage sequence. Papers devoted wholly or partly to X-ray crystallographic studies, or to computational aspects (molecular mechanics or molecular orbital calculations, simulations via molecular dynamics), will be considered if they meet certain criteria. For computational papers the requirements are that the methods used be specified in sufficient detail to permit replication of the results, and that the conclusions be shown to have relevance to experimental observations - the authors'' own data or data from the literature. Specific directions for the presentation of X-ray data are given below under Results and "discussion".