Photoswitchable “Turn-on” Fluorescence Diarylethenes: Substituent Effects on Photochemical Properties and Electrochromism
作者:Qi Ai、Shichong Pang、Kwang-Hyun Ahn
DOI:10.1002/chem.201504131
日期:2016.1.11
derived from 2,3‐bis(2‐methylbenzo[b]thiophen‐3‐yl)‐5,6‐dihydro‐4H‐thieno[2,3‐b]thiopyran‐4‐one (1) with alkyl and acetyl substituents were synthesized. The photochemical and photophysical properties of these derivatives, including the photoreaction of crystalline 1, were thoroughly investigated to reveal substituent effects on their properties. The results indicated that alkyl substituents did not significantly
衍生自2,3-双(2-甲基苯并[ b ]噻吩-3-基)-5,6-二氢-4 H-噻吩并[2,3- b ]硫代吡喃的一系列“开启”荧光二芳烃合成了具有烷基和乙酰基取代基的4-one(1)。这些衍生物的光化学和光物理性质,包括晶体1的光反应。进行了彻底研究,揭示了取代基对其性能的影响。结果表明,烷基取代基对二芳烃的吸收和发射光谱没有显着影响。然而,由于π-π共轭的扩展,观察到具有乙酰基取代基的二芳基乙烯有较大的吸收和发射波长偏移。值得注意的是,化合物的所有荧光闭环形式在黑暗中在Cu 2+存在下均异构化为开环形式。EPR结果为c- 1和Cu 2+之间的反应中可能生成的化合物1自由基阳离子中间体的形成提供了明确的证据。。DFT计算发现,基态的活化能的开环1 。+为约9.2千卡摩尔-1比的降低1无铜2+,使得在Cu 2+在室温下催化的威力氧化裂环反应可能的。
A photoswitchable diarylethene heterodimer for use as a multifunctional logic gate
作者:Qi Ai、Kwang-Hyun Ahn
DOI:10.1039/c6ra06301b
日期:——
A photoswitchable diarylethene heterodimer was prepared and its applications to logic gates were successfully demonstrated.
制备了一种可光开关的二芳基乙烯杂二聚体,并成功应用于逻辑门。
Photoswitchable fluorescent diarylethene in a turn-on mode for live cell imaging
作者:Shi-Chong Pang、Hyesook Hyun、Seungah Lee、Daeun Jang、Min Jae Lee、Seong Ho Kang、Kwang-Hyun Ahn
DOI:10.1039/c2cc30738c
日期:——
A new diarylethene-derived photochromic compound, with little cytotoxicity, plasma membrane-permeability, and efficient photoswitchability in cells upon alternative UV and visible light irradiation, was synthesized and applied to live cell imaging.
The effect of a “push—pull” structure on the turn-on fluorescence of photochromic thio-ketone type diarylethenes
作者:Shichong Pang、Daeun Jang、Woo Sun Lee、Hyeok-Mo Kang、Seung-Ju Hong、Sung Kwan Hwang、Kwang-Hyun Ahn
DOI:10.1039/c4pp00320a
日期:2015.4
a series of diarylethene compounds with a thiophene bridging unit have been synthesized to investigate the relationship between molecular structure and photochromic properties. In particular, the fluorescence properties related to compound 1 were investigated. The results showed that a six-membered ring carrying an electron-donating sulfur atom and an electron-withdrawing carbonyl group is necessary to form a “push–pull” system for the fluorescence of 1.