Chemistry

Diaryl-hemiindigos as visible light, pH, and heat responsive four-state switches and application in photochromic transparent polymers

M. Sacherer, F. Hampel, et al.

This innovative research by Maximilian Sacherer, Frank Hampel, and Henry Dube unveils a groundbreaking class of photoswitches, diaryl-hemiindigos, which respond to red light and exhibit remarkable thermal stability. With their impressive ability to switch directions, accumulate isomers, and respond to various stimuli, these compounds hold great promise for applications in molecular machines and smart materials.

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Abstract

This paper introduces a novel class of photoswitches, diaryl-hemiindigos (HIs), synthesized through a versatile and easily modifiable method. These chromophores exhibit red-light responsiveness, high thermal bistability, strong isomer accumulations in both switching directions, strong photochromism, tunable acid responsiveness, and acid gating. Their applications are showcased through four-state switching, chemical fueling, and reversible inscription into transparent polymers using light and acid/base stimuli. The study provides a comprehensive photochemical analysis of these compounds, highlighting their potential in various fields, including molecular machines, photoisomerization mechanism studies, and smart materials.

Publisher

Nature Communications

Published On

Jul 20, 2023

Authors

Maximilian Sacherer, Frank Hampel, Henry Dube

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