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首页> 外文期刊>Chemistry: A European journal >Colorimetric Solvent Indicators Based on Nafion Membranes Incorporating Nickel(II)-Chelate Complexes
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Colorimetric Solvent Indicators Based on Nafion Membranes Incorporating Nickel(II)-Chelate Complexes

机译：基于Nafion膜并入镍-螯合物的比色溶剂指示剂

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摘要

To develop solvent-recognition films, Nafion membranes incorporating cationic nickel-chelate complexes, that is, [Ni(L-1)(L-2)](+) (HL1=acetylacetone, 2,2,6,6-tetramethyl-3,5-heptanedione; L-2=N,N-diethylethylenediamine, N-butyl-N,N,N-trimethylethylenediamine), were prepared. Immersion of the films in various solvents effected the color changes varying from red to pale blue green depending on the donor number of the solvents. The color change is based on an equilibrium shift between square-planar and solvent-coordinated octahedral geometries of the cations. The degree of the color change depended on the affinity of the incorporated complex to the solvent molecules. The films were robust and exhibited a reversible solvent response. The films exhibited thermochromism when a small amount of appropriate solvents were incorporated and changed from pale blue green at low temperatures to red at high temperatures.
机译：为了开发溶剂识别膜，Nafion膜结合了阳离子镍-螯合物，即[Ni（L-1）（L-2）]（+）（HL1 =乙酰丙酮，2,2,6,6-四甲基-制备3，5-庚二酮; L-2 ＝ N，N-二乙基乙二胺，N-丁基-N，N，N-三甲基乙二胺。薄膜浸入各种溶剂中会导致颜色变化，从红色到浅蓝绿色不等，具体取决于溶剂的供体数量。颜色变化基于阳离子的方形平面和溶剂配位的八面体几何形状之间的平衡位移。颜色变化的程度取决于所掺入的配合物对溶剂分子的亲和力。该膜坚固并且显示出可逆的溶剂响应。当掺入少量合适的溶剂并从低温下的浅蓝绿色变为高温下的红色时，膜表现出热致变色。

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