Abstract
Abstract The excited state dynamics of a structurally flexible push–pull stilbene, namely, trans -4-(N,N-dimethylamino)-4′-nitrostilbene (DMANS), in solvents of varying polarities, H-bonding abilities and viscosities, has been investigated using femtosecond transient absorption spectroscopic technique. Results of DFT and TDDFT calculations have been used to explain the experimental data. Following photoexcitation of the planar DMANS molecule to the excited singlet (S 1 ) state, it undergoes cis–trans isomerization via twisting of the double bond. However, in solvents of medium and large polarities, the twisted intramolecular charge transfer (TICT) process involving only the rotation of the nitrophenyl group, but not the rotation of the dimethyl aniline or nitro group, is the dominant relaxation process in the excited state of DMANS, in polar solvents.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Photochemistry and Photobiology A: Chemistry
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.
