A series of triphenylethylene derivatives exhibited multi-photoresponsive properties, including photochromism, photodeformation and room temperature phosphorescence (RTP), which are strongly related to molecular conformations and packing in the aggregated states. Accordingly, these properties can be subtly adjusted by substituents to the center double bond and/or peripheral phenyl moieties. The introduction of bromine atom was beneficial to photochromism and photodeformation properties as a result of the additional C–H⋯Br interactions and electron-withdrawing property. Also, it can promote the RTP effect via heavy atom effect, resulting in persistent afterglow lasting up to 150 min as detected by chemiluminescent imaging system.

中文翻译：

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具有光致变色、光变形和室温磷光的多光响应三苯乙烯衍生物

一系列三苯基乙烯衍生物表现出多光响应特性，包括光致变色、光变形和室温磷光（RTP），这些特性与分子构象和聚集态堆积密切相关。因此，可以通过中心双键和/或外围苯基部分的取代基巧妙地调整这些特性。由于额外的 C–H⋯Br 相互作用和吸电子性，溴原子的引入有利于光致变色和光变形性能。此外，它还可以通过重原子效应促进 RTP 效应，导致化学发光成像系统检测到持续长达 150 分钟的持久余辉。