Femtosecond dynamics of photoinduced cis-trans isomerization of ethyl-3-(1H-indole-3-yl)acrylate

Bhaswati Sengupta, Puspal Mukherjee, Saikat Das, Shahnawaz Rafiq, Shradhey Gupta, Dattatraya H. Dethe, Pratik Sen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)31-37
Number of pages7
JournalChemical Physics Letters
Volume638
DOIs
StatePublished - Aug 26 2015

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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