Abstract 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)6(μ3-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 μ3-η1,η1,η1 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. Graphical Abstract

中文翻译：

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一种三核 Cu(II) 前驱体，用于从 C2H5OH 溶剂显色上区分 CH3OH

摘要 为了开发一种简单、快速的鉴别 CH3OH 和 C2H5OH 的方法，一种新的碳酸盐基三核 Cu(II) 前驱体 [Cu3(bpy)6(μ3-CO3)(CH3OH)](BF4)4·( CH3OH)2·(H2O)2 (1)，已被分离。我们在此报告了各种光谱（IR、UV-Vis、粉末 XRD）技术的合成、晶体结构和表征，以及该配位化合物的溶剂致变色行为。其 X 射线晶体结构显示 1 的主要结构由三个 [(bpy)2Cu]2+ 中心组成，这些中心由碳酸盐通过 μ3-η1,η1,η1 方式桥接。首次在类似结构中观察到碳酸酯和溶剂分子之间的强 O-H⋯O 氢键。其研磨粉末表现出溶剂化变色行为，可选择性地将 CH3OH 与 C2H5OH 区分开来。图形概要