Citation: WANG Li, KANG Quan-Peng, HAO Jing, ZHANG Yang, BAI Yang, DONG Wen-Kui. Two Trinuclear Cobalt(Ⅱ) Salamo-Type Complexes: Syntheses, Crystal Structures, Solvent Effect and Fluorescent Properties[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(3): 525-533. doi: 10.11862/CJIC.2018.035 shu

Two Trinuclear Cobalt(Ⅱ) Salamo-Type Complexes: Syntheses, Crystal Structures, Solvent Effect and Fluorescent Properties

School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Corresponding author: DONG Wen-Kui, dongwk@126.com
Received Date: 27 July 2017
Revised Date: 7 December 2017

Figures(8)

Two trinuclear Co(Ⅱ) complexes, [Co₃L(OAc)₂(CH₃CH₂OH)₂]·2CH₃CH₂OH·2CHCl₃ (1) and[Co₃L(OAc)₂(C₃H₇OH)₂] (2) were synthesized by the reaction of a new Salamo-type bisoxime chelating ligand of 4, 4'-dinitro-2, 2'-(1, 2-ethylenedioxybis(nitrilomethylidyne))diphenol (H₂L) with cobalt(Ⅱ) acetate tetrahydrate in different solvents. Complexes 1 and 2 were characterized by elemental analyses, IR and UV-Vis spectra, and single crystal X-ray diffraction methods. In complexes 1 and 2, there are two ligand L^2- moieties (which provide N₂O₂ donors), two acetate ions, two coordinated ethanol or n-propanol molecules, respectively. Although the two complexes were synthesized in different solvents, it is worthwhile that the Co(Ⅱ) ions in the structures of the two complexes adopt slightly distorted hexa-coordinated geometries. As a result, solvent effect was assumed to have played a crucial role in their coordination environment. In addition, when excited at 450 nm, the complexes 1 and 2 show an intense photoluminescence with maximum emission at ca. 568 and 566 nm, respectively.
- Salamo-type bisoxime ligand,
- Co(Ⅱ) complex,
- synthesis,
- crystal structure,
- luminescence property
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