文献类型：期刊文献

英文题名：Dual-responsive molecular systems via It-bridge engineering: Visible-light photochromism, electrofluorochromism and differential emission switching

作者：Zeng, Yan[1];Chen, Siyuan[1];Dou, Qingyu[1];Wang, Xuewen[1];Luo, Qianfu[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Dept Chem, Shanghai 200237, Peoples R China

年份：2026

卷号：245

外文期刊名：DYES AND PIGMENTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001578158600002)】；

语种：英文

外文关键词：Visible-light photochromism; Electrofluorochromism; Aggregation-induced emission; Stimuli-responsive materials; Molecular engineering

摘要：Smart stimuli-responsive materials have attracted considerable attention due to their crucial role in advancing next-generation technologies. Optical and electrical stimuli are particularly valuable owing to their high sensitivity and rapid response kinetics. In this study, we develop an innovative multi-stimuli-responsive molecular system through It-conjugation engineering. This system integrates electroactive triphenylamine (TPA) and photoactive phenanthrene motifs using both direct linkage and benzene-ring-bridged strategies. Systematic investigations reveal that It-conjugation extension plays a decisive role in governing the photochemical and electrochemical properties: Benzene-bridged derivatives enable visible-light-driven photochromism (activation at 400-410 nm), overcoming the limitations associated with conventional UV-dependent activation; directly linked TPA-phenanthrene conjugates exhibit rapid electrochromism through the formation of TPA+center dot radicals, and bidirectional fluorescence modulation. Notably, the engineered diarylethenes demonstrate synergistic photochromic-electrochromic coupling within a single molecular scaffold, as evidenced by the successful fabrication of an electrochromic device. This integrated optical and electrical responsiveness provides a novel molecular engineering strategy for the development of adaptive, multifunctional smart materials.