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Synthesis, crystal structure, and fluorescence of an unexpected dialkoxo-bridged dinuclear copper(II) complex with bis(salen)-type tetraoxime

Authors :
Lan-Qin Chai
Yin-Xia Sun
Wen-Kui Dong
Li Zhao
Gang Wang
Xiong-Hou Gao
Source :
Journal of Coordination Chemistry. 65:1621-1631
Publication Year :
2012
Publisher :
Informa UK Limited, 2012.

Abstract

An unexpected dinuclear Cu(II) complex, [Cu2(L2)2] (H2L2 = 3-methoxysalicylaldehyde O-(2-hydroxyethyl)oxime), has been synthesized via complexation of Cu(II) acetate monohydrate with H4L1. Catalysis by Cu(II) results in unexpected cleavage of two N–O bonds in H4L1, giving a dialkoxo-bridged dinuclear Cu(II) complex possessing a Cu–O–Cu–O four-membered ring core instead of the usual bis(salen)-type tetraoxime Cu3–N4O4 complex. Every complex links six other molecules into an infinite-layered supramolecular structure via 12 intermolecular C–H ··· O hydrogen bonds. Furthermore, Cu(II) complex exhibits purple emission with maximum emission wavelength λmax = 417 nm when excited with 312 nm.

Details

ISSN :
10290389 and 00958972
Volume :
65
Database :
OpenAIRE
Journal :
Journal of Coordination Chemistry
Accession number :
edsair.doi...........52034a50c5424ee81b0354515cfd59b3