西北师范大学化学化工学院林奇研究小组揭示了客体分子诱导光致变色柱[5]芳烃基吩噻嗪衍生物的FRET增强。相关论文于2025年3月25日发表于国际顶尖学术期刊《中国化学》杂志上。

近年来，吩噻嗪类衍生物的光致变色行为的研究不仅丰富了变色材料的种类，而且为F共振能量转移（FRET）。这一进展拓宽了光致变色材料的应用潜力，为光致变色材料的研究提供了新的视角。

本文合成了柱状[5]芳烃连接的双吩噻嗪衍生物（DPP5），并设计了对二苄基连接的双吩噻嗪衍生物（DPDB）和丁基连接的双吩噻嗪衍生物（DPB）进行对比研究。紫外-可见光谱、电子顺磁共振（EPR）和化学氧化法证实了DPP5分子的光致变色行为，表明DPP5分子转化为自由基阳离子DPP5⁺，随后进入指示DPP5²⁺。

以DPP5²⁺为能量供体，尼罗红（NiR）为能量受体，构建了FRET系统。将客体分子1,6-二溴己烷（1,6-DBH）和1,10-二溴癸烷（1,10- DBD）引入到上述FRET体系中，利用柱[5]芳烃的空腔通过主客体相互作用提高了FRET体系的聚集度，从而提高了能量传递效率。将吩噻嗪类衍生物的光致变色特性应用到FRET体系中，并采用主题化客体分子的策略来提高FRET的性能，将有助于新型光致变色材料的发展。

附：英文原文

Title: Guest Molecule Induced FRET Enhancement of Photochromic Pillar[5]arene-Based Phenothiazine Derivatives

Author: Hong Yao, Wenyu Cao, Jinwang Wang, Feixiang Yang, Shuning Qin, Tai-Bao Wei, Bingbing Shi, Qi Lin

Issue&Volume: 2025-03-25

Abstract: In recent years, the study of the photochromic behavior of phenothiazine derivatives has not only enriched the variety of color-changing materials but also provided new donor molecules for the construction of Frster Resonance Energy Transfer (FRET). This advancement broadens the application potential of photochromic materials and offers fresh perspective for FRET research. Herein, pillar[5]arene-linked biphenothiazine derivative (DPP5) was synthesized, while p-dibenzyl-linked biphenothiazine derivative (DPDB) and butyl-linked biphenothiazine derivative (DPB) were designed for comparative study. The photochromic behavior was demonstrated by UV-vis spectra, electron paramagnetic resonance (EPR) and chemical oxidation method, showing the transformation of DPP5 molecule into the radical cation DPP5+ and subsequently into the dication DPP52+. Furthermore, a FRET system was constructed using dication species DPP52+ as the energy donor and Nile red (NiR) as the energy acceptor. The introduction of guest molecules, 1,6-dibromohexane (1,6-DBH) and 1,10-dibromodecane (1,10-DBD), into the above FRET system enhanced the energy transfer efficiency by increasing the aggregation degree of FRET system by utilizing the cavity of pillar[5]arene through host-guest interaction. The application of the photochromic behavior of phenothiazine derivatives into FRET system, along with the strategy of using guest molecule to enhance FRET properties, will contribute to the development of novel photochromic materials.

DOI: 10.1002/cjoc.70011

Source: https://onlinelibrary.wiley.com/doi/full/10.1002/cjoc.70011