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A trinuclear Cu(II) precursor for solvatochromically distinguishing CH3OH from C2H5OH

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journal contribution
posted on 2019-12-31, 08:44 authored by Xue-Mei Gao, Wen Ma, Gang Jin, Jing-Zhe Li, Xue-Wen Wei, Kuan-Guan Liu

In order to develop an easy and rapid identification method for distinguishing CH3OH from C2H5OH, a new carbonate-based trinuclear Cu(II) precursor, [Cu3(bpy)63-CO3)(CH3OH)](BF4)4·(CH3OH)2·(H2O)2 (1), has been isolated. We report here the synthesis, crystal structure, and characterizations by various spectroscopic (IR, UV–Vis, powder XRD) techniques, as well as the solvatochromic behavior of this coordination compound. Its X-ray crystal structure reveals that the main structure of 1 consists of three [(bpy)2Cu]2+ centers, which are bridged by carbonate via a μ3111 fashion. Strong O–H⋯O hydrogen bonding between the carbonate and solvent molecules has been observed for the first time in similar structures. Its ground powder exhibits solvatochromic behavior that selectively distinguishes CH3OH from C2H5OH.

Funding

We gratefully acknowledge the financial support of National Natural Science Foundation of China (grant No. 21601097) and the National First-rate Discipline Construction Project of Ningxia (Chemical Engineering & Technology, NXYLXK2017A04).

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