Steady state absorption, fluorescence and femtosecond transient absorption techniques were employed to investigate the excited state relaxation mechanism of trans-ethyl-3-(1H-indole-3-yl)acrylate (trans-EIA). The measured large value of difference in the static dipole moment from ground state to excited state reflects the involvement of excited state intramolecular charge transfer in EIA. The charge-transfer time constant has been estimated to be 0.35 ps. The charge transfer state depletes to the ground state through internal conversion along double bond torsional coordinate at perpendicular conformation with a 1.8 ps time constant, leading to the trans-cis isomerization and was further confirmed by chromatography and 1H NMR experiments.
|Number of pages||7|
|Journal||Chemical Physics Letters|
|State||Published - Aug 26 2015|
Bibliographical noteFunding Information:
BS, SD and SR thank CSIR (Council of Scientific and Industrial Research–India) and PM thanks UGC (University Grant Commission–India) for awarding fellowships. This work is financially supported by the Science and Engineering Research Board, Department of Science and Technology, Government of India (Project No. SR/S1/PC-08/2011) and IIT Kanpur.
© 2015 Elsevier B.V. All rights reserved.
ASJC Scopus subject areas
- Physics and Astronomy (all)
- Physical and Theoretical Chemistry