期刊
INORGANICA CHIMICA ACTA
卷 362, 期 2, 页码 551-555出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2008.05.007
关键词
Trinuclear; Crystal structure; Integrity; Bioactivity
资金
- National Natural Science Foundation of China [20171035]
Two new trinuclear complexes, Cu3L2(py)(2) (1) and Ni3L2(py)(4) (2), have been synthesized and characterized, where L-3 is N-2-methyl-acryloyl-salicylhydrazidate. Central metal ion and two terminal metal ions in the two complexes are combined by two bridging deprotonated L-3 ligands, forming a bent trinuclear structure unit with an M-N-N-M-N-N-M core. The bent angles in complexes 1 and 2 are 167.6(1)degrees and 75.4(1)degrees, respectively. Three nickel ions in compound 2 exhibit alternating square-planar and octahedral geometries, while three copper ions in compound 1 follow square-planar mode. The studies in solution integrity and stability of compounds 1 and 2 show they are soluble and stable in DMF. UV-Vis titrations demonstrate compound 1 is stable in DMF even in the presence of excess metal ions. Antibacterial screening data indicate the two compounds all have stronger antimicrobial activities against the tested microorganisms than ligand. The trinuclear copper compound 1 is more active than monocopper compounds in the previous study, and the trinuclear nickel compound 2 is less active than tetranuclear nickel compound in the previous study. (C) 2008 Elsevier B.V. All rights reserved.
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