基于二芳基乙烯新型门控光致变色材料的制备与应用

Preparation and application of new gated photochromic materials based on diarylethene

一种基于二芳基乙烯的门控光致变色衍生物DTEC在溶液中对光具有反应惰性,即用任何波长的光辐照下,DTEC都不会发生环化反应,溶液始终为无色。但当加入银离子,DTEC的光致变色反应活性被激活,用紫外光辐照,溶液从无色变为黄色,这表明DTEC由开环体向闭环体转变。因此,对于光惰性的DTEC,可通过加入银离子来调节其光反应活性,即通过银离子来门控DTEC的光致变色性能。进而,在单分子平台的基础上,可构建一个具有三个输入信号(银离子、紫外光和DTEC)和一个输出信号(410 nm处的吸光度)的分子逻辑电路,这对于多刺激响应光开关的开发具有重要价值。

Describing a gated photochromic derivative(DTEC) based on diarylethene,which is inert to light in solution.In other words,compound DTEC does not undergo an effective photochromic transformation in response to any wavelength of light,and the solution is always colorless.However,after addition of Ag~+ ions,the photochromic reaction of DTEC is activated and the solution changes from colorless to yellow upon irradiation with UV light,suggesting that DTEC changes to ring-closed isomer.Therefore,the photochromic reactivity of DTEC can be restored by adding Ag~+ ions,indicating that the photochromic properties of DTEC can be gated by Ag~+ ions.Furthermore,a molecular logic circuit can be successfully fabricated with three inputs(Ag^(+ )ions,UV and DTEC) and one output(absorbance at 410 nm),which shows great potential for the development of multi-stimulus-responsive photoswitches.