Chatterjee Sheelbhadra, Molla Sariful, Ahmed Jakir, Bandyopadhyay Subhajit
Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia, West Bengal, 741246, India.
Chem Commun (Camb). 2023 Oct 24;59(85):12685-12698. doi: 10.1039/d3cc04269c.
Photochromic conducting molecules have emerged because of their unique capacity to modulate electrical conductivity upon exposure to light, toggling between high and low conductive states. This unique amalgamation has unlocked novel avenues for the application of these materials across diverse areas in optoelectronics and smart materials. The fundamental mechanism underpinning this phenomenon is based on the light-driven isomerization of conjugated π-systems which influences the extent of conjugation. The photoisomerization process discussed here involves photochromic switches such as azobenzenes, diarylethenes, spiropyrans, dimethyldihydropyrenes, and norbornadiene. The change in the degree of conjugation alters the charge transport in both single molecules and bulk states in solid samples or solutions. This article discusses a number of recent examples of photochromic conducting systems and the challenges and potentials of the field.
光致变色导电分子因其在光照下调节电导率的独特能力而出现，能在高导电态和低导电态之间切换。这种独特的结合为这些材料在光电子学和智能材料的不同领域的应用开辟了新途径。支撑这一现象的基本机制基于共轭π体系的光驱动异构化，这会影响共轭程度。这里讨论的光异构化过程涉及光致变色开关，如偶氮苯、二芳基乙烯、螺吡喃、二甲基二氢芘和降冰片二烯。共轭程度的变化改变了固体样品或溶液中单个分子和体相状态下的电荷传输。本文讨论了一些光致变色导电系统的最新实例以及该领域的挑战和潜力。
