Spectral, magnetic, thermal and biological studies on Ca(II) and Cu(II) complexes with a novel crowned Schiff base
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- 作者：Irina Zarafu ; Mihaela Badea ; Gabriela Ioniţă…
- 关键词：Complex ; Crowned Schiff base ; Thermal behaviour ; Antimicrobial ; Antibiofilm ; Cytotoxicity ; Antioxidant
- 刊名：Journal of Thermal Analysis and Calorimetry
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：127
- 期：2
- 页码：1511-1521
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
- 出版者：Springer Netherlands
- ISSN：1588-2926
- 卷排序：127
文摘
A series of complexes [Ca(HL)(OH2)4]Cl2·4H2O (1), [CuL2]·2H2O (2) and [Cu{Ca(L)(OH2)2}2]Cl4·H2O (3) (HL: 2-hydroxy-8-methyl-tricyclo[7.3.1.02.7]tridec-13-N-4′(benzo-15-crown-5-ether)-imine) were synthesised and characterised. The features of complexes have been assigned from microanalytical data, IR, UV–Vis–NIR and EPR spectra, magnetic data at room temperature as well as thermal analysis. The ligand coordinates through azomethinic nitrogen and hydroxylic oxygen at Cu(II) and through etheric oxygen at Ca(II). The electronic and EPR spectra suggest a square planar stereochemistry for Cu(II). The thermal analysis evidenced that thermal transformations are complex processes according to DTG and DTA curves including (crystallisation or coordination) water elimination, thermolyses and oxidative degradation of Schiff base. The results of the biological assays revealed that the complexes exhibited good antimicrobial activity against planktonic and sessile bacterial and fungal strains.