文献类型：期刊文献

英文题名：Dual-responsive molecular systems via π-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] Department of Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237, China

年份：2026

卷号：245

外文期刊名：Dyes and Pigments

收录：EI(收录号：20253819204847)

语种：英文

外文关键词：Benzene - Electrochromic devices - Electrochromism - Photochromism - Scaffolds - Scaffolds (biology)

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 π-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 π-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+? 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. ? 2025 Elsevier Ltd