光致变色
光化学
化学
分子内力
脱水
荧光
Crystal(编程语言)
相变
晶体结构
量子产额
激发态
结晶学
立体化学
光学
物理
核物理学
量子力学
程序设计语言
生物化学
计算机科学
出处
期刊:Zeitschrift für Kristallographie
[Oldenbourg Wissenschaftsverlag]
日期:2021-01-22
卷期号:236 (1-2): 43-50
被引量:1
标识
DOI:10.1515/zkri-2020-0091
摘要
Abstract The crystals of N -salicylideneaniline (SA) and SA derivatives are classic functional materials that exhibit reversible colour changes (photochromism) and/or excited-state intramolecular proton transfer (ESIPT) fluorescence emission under ultraviolet (UV) light irradiation. In this study, a novel SA derivative was synthesised with an extended alkyl chain, N -(5-bromo-salicylidene)-3-aminoethylpyridine (5Br-SAEP). The photophysical properties of 5Br-SAEP were characterised in the crystalline state. The monohydrated crystal ( 1H ) of 5Br-SAEP was dehydrated to form the anhydrous crystal ( 1A ) at a relative humidity of less than 76%. The photochromic activity was switched by the dehydration phase transition from the non-photochromic 1H to the photochromic 1A . The quantum yield of fluorescence decreased significantly from 8% in 1H to 3% in 1A . The in situ change of photophysical properties occurred due to the change in the crystal structure. This indicated the potential of the solvated crystals of the SAEP derivatives for applications in novel switching or smart materials.
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