allows for unprecedented in situ visualization of biological structures, but its application to materials science has so far been comparatively limited. One of the main reasons is the lack of powerful dyes that allow for labeling and photoswitching in materials science systems. In this study it is shown that appropriate substitution of diarylethenes bearing a fluorescent closed and dark open form paves
the cycloreversion quantum yield of the turn-on mode fluorescent diarylethenes, 1,2-bis(2-ethyl-6-aryl-1-benzothiophene-1,1-dioxide-3-yl)perfluorocyclopentenes. Diarylethene derivatives having ortho-substituted phenyl rings at 6- and 6′-positions of 1,2-bis(2-ethyl-1-benzothiophene-1,1-dioxide-3-yl)perfluorocyclopentene were synthesized and their photophysical and photochemical properties were evaluated
Photoswitchable Turn-on Mode Fluorescent Diarylethenes: Strategies for Controlling the Switching Response
作者:Masahiro Irie、Masakazu Morimoto
DOI:10.1246/bcsj.20170365
日期:2018.2.15
has been developed. They are sulfone derivatives of 1,2-bis(2-alkyl-4-methyl-5-phenyl-3-thienyl)perfluorocyclopentenes and 1,2-bis(2-alkyl-1-benzothiophen-3-yl)perfluorocyclopentenes. By chemical modifications of the structures their switching response was tuned to meet the requirements for super-resolution fluorescence microscopies. The water-soluble derivatives have been successfully applied to acquire
Nanoscopic Visualization of Cross-Linking Density in Polymer Networks with Diarylethene Photoswitches
作者:Eric Siemes、Oleksii Nevskyi、Dmytro Sysoiev、Sarah K. Turnhoff、Alex Oppermann、Thomas Huhn、Walter Richtering、Dominik Wöll
DOI:10.1002/anie.201807741
日期:2018.9.17
super‐resolution fluorescence‐microscopy‐based method for visualizing and quantifying cross‐linker points in polymer systems. A novel diarylethene‐based photoswitch with a highly fluorescent closed and a non‐fluorescent open form is used as a photoswitchable cross‐linker in a polymer network. As an example for its capability to nanoscopically visualize cross‐linking, we investigate pNIPAM microgels as a
took place with the visiblelight in the far off-resonance region of the absorption edge. Based on numerical simulations of the formation process of 1b from 1a by irradiation with 450 nm light, weak absorption coefficients at 450 nm in n-hexane and CCl4 were estimated to be 0.084 and 0.19 M-1 cm-1, respectively. The reversible fluorescence photoswitching with the single visiblelight is advantageously