Acta Chimica Sinica ›› 2022, Vol. 80 ›› Issue (9): 1223-1230.DOI: 10.6023/A22040169 Previous Articles     Next Articles

Article

基于苯并[b]萘并[1,2-d]噻吩的可见光驱动光环化荧光turn-on型二芳基乙烯的合成与性能研究

赵杰a, 王治文a, 李华清b, 艾琦a,*(), 蔡培庆a, 司俊杰a, 姚鑫a, 胡晓光b,*(), 刘祖刚a,*()   

  1. a 中国计量大学光学与电子科技学院 杭州 310000
    b 郑州大学材料科学与工程学院 郑州 450001
  • 投稿日期:2022-08-03 发布日期:2022-08-09
  • 通讯作者: 艾琦, 胡晓光, 刘祖刚

Synthesis and Properties of Visible-light-driven Fluorescence Turn-on Diarylethenes Based on Benzo[b]naphtho[1,2-d]thiophene

Jie Zhaoa, Zhiwen Wanga, Huaqing Lib, Qi Aia(), Peiqing Caia, Junjie Sia, Xin Yaoa, Xiaoguang Hub(), Zugang Liua()   

  1. a College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310000
    b School of Material Science & Engineering, Zhengzhou University, Zhengzhou 450001
  • Received:2022-08-03 Published:2022-08-09
  • Contact: Qi Ai, Xiaoguang Hu, Zugang Liu

Diarylethenes (DAEs) fluorescent photoswitches have attracted much attention because of their promising applications in super-resolution bioimaging such as PALM (photoactivatable localization microscopy) and STORM (stochastic optical reconstruction microscopy). Up to now, the developed materials mainly relied on the combination of diarylethene photoswitches and fluorescent dye moiety, in which the fluorescence intensities are modulated by fluorescence resonance energy transfer or intramolecular electron transfer. However, these fluorescence turn-off mode photoswitches are not suitable for PALM and STORM. Thus, the construct of fluorescence turn-on diarylethenes is highly desirable, especially all visible-light-driven photoswitchable DAEs that rule out the use of high energy UV light. Herein, we report a 405 nm visible-light-triggered fluorescence turn-on DAE BNTP-BTTO4 based on benzo[b]naphtho[1,2-d]thiophene (BNTP) group, and the photophysical and stability properties of BNTP-BTTO4 was systematically investigated. Moreover, with the assistance of density functional theory (DFT) calculations, the reasons for the visible-light-driven photocyclization and fluorescent turn-on were clarified. The introduction of electron-donating BNTP redshifts the absorption edge of the BNTP-BTTO4 open-isomer (ca. 430 nm) compared with the control molecule Ph-BTTO4 open-isomer (ca. 390 nm). In addition, it was found that the introduction of BNTP resulted in the molecule exhibiting good fatigue resistance, thermal stability, and photostability than the control molecule. There was no obvious changes in the absorption spectra of BNTP-BTTO4 upon alternative irradiation with 365 or 405 nm light and visible light longer than 450 nm for 20 cycles. Furthermore, almost no change was observed in the absorption spectra of photostationary state BNTP-BTTO4(c) after storing in the dark for 24 h at either room temperature or 60 ℃. Particularly, the absorption intensity of BNTP-BTTO4(c) only decreased by 4% after 200 min of 405 nm visible light irradiation, and the photostability was significantly improved compared with the control molecule. This study provides a new idea for the design and development of visible-light-driven fluorescence turn-on DAEs with excellent performance.

Key words: photochromic, diarylethenes, visible-light-driven, fluorescence turn-on, benzo[b]naphtho[1,2-d]thiophene