Abstract
Transient absorption and gain spectra of coumarin 153 in polar solvents are studied by the pump/supercontinuum probe (PSCP) technique with 40 fs time resolution. Vibrational frequencies in the ground and excited state of the chromophore are obtained from the early transient spectra. At later time, the gain band experiences a considerable red shift with two isosbestic points which appear successively, while a pronounced excited-state absorption band at 428 nm changes only negligibly. These observations are compared to the results from semi-empirical calculations for higher excited states. They are not fully consistent with relaxation due to pure solvation and may indicate an intramolecular process.
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 callDisclaimer: 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.
