Quantitative distinction between competing intramolecular bond twisting and solvent relaxation dynamics: an ultrafast study.
Often an intramolecular relaxation process takes place in a time scale similar to that of the solvent relaxation process. Under these circumstances the dynamic Stokes' shift of the probe can be modulated by the combined effect of these two relaxation processes. In the present article we have studied ultrafast solvent relaxation using three different coumarin dyes and proposed a methodology for the quantitative separation of the dynamics of two competing processes, namely, solvent relaxation and bond twisting, that take place simultaneously in the present systems.
Singh
Prabhat K
PK
Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
Nath
Sukhendu
S
Kumbhakar
Manoj
M
Bhasikuttan
Achikanath C
AC
Pal
Haridas
H
D003374:Coumarins / Q000737:chemistry*; D008722:Methods; D008958:Models, Molecular; D009038:Motion; D012997:Solvents; D013995:Time
D003374:Coumarins; D012997:Solvents; C030123:coumarin