Diarylethenes with a Narrow Singlet–Triplet Energy Gap Sensitizer: a Simple Strategy for Efficient Visible‐Light Photochromism,Advanced Optical Materials

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Diarylethenes with a Narrow Singlet–Triplet Energy Gap Sensitizer: a Simple Strategy for Efficient Visible‐Light Photochromism
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-01-31 , DOI: 10.1002/adom.201700847
Zhiwei Zhang ₁ , Junji Zhang ₁ , Bin Wu ₂ , Xin Li ₃ , Yi Chen ₁ , Jinhai Huang ₁ , Liangliang Zhu ₂ , He Tian ₁

Affiliation

All‐organic visible‐light photochromism is reported here via a novel strategy with narrow singlet–triplet energy gap (ΔE_ST) materials as a sensitizer. Taking advantage of the narrow ΔE_ST feature and the triplet–triplet energy transfer process, highly efficient photochromism of diarylethenes (DAEs) with both ring‐open and ring‐closure excitations shifted to visible light region is successfully achieved. Moreover, the wavelength of the visible excitation light can be easily modulated (e.g., from 405 to 470 nm) by elaborate selection of matched sensitized molecules. The “write‐and‐erase” application of this photochromic system in polymer films is further demonstrated. This strategy provides a simple and versatile selection of well‐matched DAE/sensitizer couples for visible‐light photochromism without complicated molecular design.

中文翻译：

具有窄单重态-三重态能隙敏化剂的双芳烃：高效可见光光致变色的简单策略

本文通过一种新颖的策略报告了全有机可见光光致变色现象，该策略使用窄的单重态-三重态能隙（ΔE _ST）材料作为敏化剂。利用狭窄的ΔE _ST通过三重态和三重态-三重态能量转移过程，成功实现了双芳烃（DAE）的高效光致变色，其开环和闭环激发都转移到了可见光区域。此外，通过精心选择匹配的敏化分子，可以容易地调制可见激发光的波长（例如，从405至470nm）。进一步证明了该光致变色系统在聚合物薄膜中的“写入和擦除”应用。该策略为可见光光致变色提供了简单且通用的匹配良好的DAE /敏化剂对选择，而无需复杂的分子设计。

更新日期：2018-01-31

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