Emissive Mononuclear Cu(I) Triphenylphosphine Complexes with Functionalized 6-tert-Butoxycarbonyl-2,2'-bipyridine

doi:10.1007/s40242-018-7201-7

Abstract

Abstract: Two new emissive mononuclear copper(I) triphenylphosphine complexes with functionalized 6-tert- butoxycarbonyl-2,2'-bipyridine chelating ligands were prepared and characterized. Each Cu(I) cation has a markedly distorted P₂N₂ tetrahedral array with two different Cu—N bond distances, due to the addition of the bulky tert-butoxycarbonyl group at the 6-position of the 2,2'-bipyridyl ring. A weak low-energy broad absorption band appears at 330—500 nm in their CH₂Cl₂ solutions, which is influenced by the methylation of the 2,2'-bipyridyl ring. At room temperature, the photoluminescence can be clearly observed both in degassed CH₂Cl₂ solution and in the solid state, because of the introduction of the bulky tert-butoxycarbonyl substituent, and the emission properties are remarkably affected by both the methylation and the alkoxycarbonyl variation of the 2,2'-bipyridyl ring. It is shown that the introduction of the bulky tert-butoxycarbonyl group is favorable for improving the emission properties of the 6-alkoxycarbonyl-2,2'-bipyridine-based cuprous complexes.

Key words: Cuprous, Methylation, Alkoxycarbonyl, Phosphine, Luminescence

LUO Yansheng, ZENG Xuehua, WANG Wanman, CHEN Jinglin, HE Lihua, ZHANG Mengli, LIU Suijun, WEN Herui. Emissive Mononuclear Cu(I) Triphenylphosphine Complexes with Functionalized 6-tert-Butoxycarbonyl-2,2'-bipyridine[J]. Chemical Research in Chinese Universities, 2018, 34(1): 19-23.

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