Catalyst- and Template-Free Ultrafast Visible-Light-Triggered Dimerization of Vinylpyridine-Functionalized Tetraarylaminoborane: Intriguing Deep-Blue Delayed Fluorescence.
Kalluvettukuzhy K NeenaPagidi SudhakarPakkirisamy ThilagarPublished in: Angewandte Chemie (International ed. in English) (2018)
A photoredox-catalyst- and template-free sunlight-induced molecular dimerization of a vinylpyridine-functionalized tetraarylaminoborane (TAAB) has been accomplished for the first time. The reaction is quantitative, highly regioselective, and thermally irreversible. The presence of the propeller-shaped TAAB framework allows selective photodimerization of one of the two vinyl pyridine units. Monomer 1 and photodimer 2 exhibit distinct photophysical properties with delayed fluorescence (DF) both in solution and the solid state, which was confirmed by steady-state and time-resolved luminescence studies. Quantum mechanical calculations were performed to support the experimental observations. Our new approach using [2+2] cycloaddition chemistry paves the way for the development of highly sought-after deep-blue DF materials.
Keyphrases
- visible light
- energy transfer
- molecularly imprinted
- solid state
- quantum dots
- light emitting
- single molecule
- solid phase extraction
- molecular dynamics
- diabetic rats
- molecular dynamics simulations
- high resolution
- oxidative stress
- ionic liquid
- drug discovery
- drug induced
- mass spectrometry
- monte carlo
- gold nanoparticles
- room temperature
- electron transfer