Tang Shanliang, An Jing, Song Fengling, Lv Meiheng, Han Keli, Peng Xiaojun
State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China.
Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, China.
ACS Appl Mater Interfaces. 2021 Nov 3;13(43):51414-51425. doi: 10.1021/acsami.1c11841. Epub 2021 Oct 24.
Inkless printing based on rewritable papers has recently made great progress because it can improve the utilization rate of papers, which is of great significance for saving resources and protecting the environment. Among them, light-responsive rewritable papers (LRPs) are a hot research topic because light is clean, easily available, wavelength and intensity adjustable, and noncontacting. However, the photochromic material, as the imaging substance of LRPs, is easily affected by environmental conditions, resulting in insufficient time to read the information. In view of this, we designed and constructed an acid/base tunable diarylethene molecular system that can effectively adjust the photochromic properties by reversibly changing the electron density of the diarylethene photoreaction center through protonation and demonstrated its potential as an imaging material with a longer legible time. What makes us more satisfied is that the acidification can not only extend the legible time of carrying information but also bring a clear and stable absorption/fluorescence imaging dual mode, which can better reflect details and improve contrast. Therefore, we believe that this tunable photochromic diarylethene molecule is a potential imaging material for the development of new LRPs.
基于可重写纸的无墨打印近年来取得了重大进展，因为它可以提高纸张利用率，这对于节约资源和保护环境具有重要意义。其中，光响应性可重写纸（LRP）是一个热门研究课题，因为光清洁、易于获取、波长和强度可调节且无需接触。然而，作为LRP成像物质的光致变色材料容易受到环境条件的影响，导致读取信息的时间不足。鉴于此，我们设计并构建了一种酸/碱可调的二芳基乙烯分子体系，该体系可以通过质子化可逆地改变二芳基乙烯光反应中心的电子密度，从而有效调节光致变色性能，并证明了其作为具有更长可读时间的成像材料的潜力。更令我们满意的是，酸化不仅可以延长携带信息的可读时间，还能带来清晰稳定的吸收/荧光成像双模式，能够更好地反映细节并提高对比度。因此，我们认为这种可调光致变色二芳基乙烯分子是开发新型LRP的潜在成像材料。
