Three carbothioamide derivatives with reversible P-type photochromic properties in the solid state were synthesized in a one-step reaction. Based on the single crystal structures, the FT-IR spectra and theory calculations, the proposed photochromic mechanism was the intermolecular proton transfer between the thio-keto and thio-enol tautomer. Nanofibrous membranes were prepared by electrospinning, which showed improved reversible photochromic properties in comparison of the compound itself. This work may open a new pathway for design and synthesis of the new solid-state photochromic materials with high-performance.

中文翻译：

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（E）-2-（苯并[ b ]噻吩-2-基亚甲基）-N-乙基肼-1-碳硫酰胺的固态光致变色性质，机理和电纺膜

一步反应合成了三种具有固态可逆P型光致变色特性的碳硫酰胺衍生物。基于单晶结构，FT-IR光谱和理论计算，提出的光致变色机理是硫代-酮基与硫代-烯醇互变异构体之间的分子间质子转移。通过静电纺丝制备了纳米纤维膜，与化合物本身相比，纳米纤维膜显示出改善的可逆光致变色性能。这项工作可能为高性能的新型固态光致变色材料的设计和合成开辟一条新途径。