热致变色
荧光
铜
吡啶
碘化物
液氮
化学
光化学
苯
紫外线
无机化学
材料科学
有机化学
光学
光电子学
物理
作者
H. D. Hardt,Pierre Aimar
标识
DOI:10.1002/zaac.19734020113
摘要
Abstract Copper(I)iodide reacts with pyridine to form (Cu py)I, and further to form (Cu py 2 )I. A tripyridino compound, although existing in contact with pyridine, is not obtainable at room temperature and normal pressure. The three solvates are different in structure and in their fluorescence colour in ultraviolet light. (Cu py 3 )I crystals are not fluorescent at room temperature but show yellow fluorescence at −180°C. (Cu py 2 )I is fluorescent with a green colour at room temperature as well as at very low temperatures. (Cu py)I shows yellow fluorescence at room temperature which reversibly changes to orange, then to red and finally to violet by cooling in liquid nitrogen („fluorescence thermochromism”︁). The last named compound is spontaneously decomposed by benzene to form highly dispersed copper iodide, which fluoresces red at room temperature, but not at all in liquid nitrogen.
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