Blue-/NIR Light-Excited Fluorescence Switch Based on a Carbazole-Dithienylethene-BF2bdk Triad.
Ziyong LiYingying PeiYangyang WangZhiqiang LuYijie DaiYing DuanYongjie MaHui GuoPublished in: The Journal of organic chemistry (2019)
The development of novel solid-state fluorescence switches, particularly triggered by visible light, is of increasing interest for the potential application in optical data storage and super-resolution fluorescence microscopies. In this study, two carbazole-dithienylethene-BF2bdk triads CDB1 and CDB2, suspending carbazole and BF2bdk moieties on both sides of dithienylethene unit, have been developed. They exhibit blue-/NIR light-controlled photochromism with solvent-dependent characteristics. Moreover, CDB1 (o) reveals blue-/NIR light-induced reversible fluorescent switching behaviors in toluene, chloroform, poly(methyl methacrylate) (PMMA) film, and powder state, while its analogue CDB2 (o) in the powder state exhibits no fluorescence due to a strong intermolecular π-π stacking interaction, and the fluorescent switching performance is observed only in toluene and PMMA film. The density functional theory calculations further validate the differences in their optical properties in the solution and powder states.
Keyphrases
- energy transfer
- density functional theory
- solid state
- single molecule
- quantum dots
- photodynamic therapy
- living cells
- molecular dynamics
- fluorescent probe
- visible light
- drug release
- fluorescence imaging
- light emitting
- high resolution
- reduced graphene oxide
- machine learning
- big data
- risk assessment
- ionic liquid
- gold nanoparticles