摘要
Three novel dithienylethenes modified by bifluoroboron β-diketonate fragments have been successfully developed. Upon blue light irradiation, they reached photostationary state within 2-5 s, as well as 100% conversion ratio and photocyclization quantum yield of > 0.70. Such fascinating photochromism were endowed by collaborative role of electron-withdrawing effect of BF_(2)bdk group to reduce HOMO-LUMO electronic gap for the open isomer, together with intramolecular hydrogen bonds and CH-π interactions favoring antiparallel conformation fixation. Moreover, they displayed specific discrimination and photoswitchable bacterial imaging for S. aureus.
基金
financial support from the Natural Science Foundation of Henan Province(No.222300420501)
the Science and Technology Project of Henan Province(No.212102210549)
the Key Scientific Research Project of Higher Education of Henan Province(No.22A430007)
National College Students Innovation and Entrepreneurship Training Program(No.202110482010)。
