Abstract
Light-induced intramolecular charge transfer (ICT) is important in chemical and physical processes involving organic reactions and materials. However, because of the fast light-absorption rates and short excited state lifetime, charge-transfer separation and the resulting molecular motion in the ICT states are generally expected to be unidirectional and uncontrollable. Herein, an unexpected hyperconjugation derived light-switched ICT and tunable fluorescence emissions are described, and these can be rapidly and reversibly controlled in anthrapyridinium dyes by irradiation with light of different wavelengths such as 365 nm and 254 nm. Most importantly, the subtle differences between the dyes in terms of the σ–π (C–H and C–C) hyperconjugation between the alkyl chains and the pyridinium, which were confirmed from the 1H NMR spectra for the first time, and which was further proved to be the key factor affecting the light-induced ICT of the dyes.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.