Surface-assisted transient displacement charge technique. I. Photoinduced charge transfer in self-assembled monolayers

Alexey V. Krasnoslobodtsev, Sergei N. Smirnov

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Surface-assisted photoinduced transient displacement charge (SPTDC) technique was developed in order to study light-induced charge transfer in surface-bound molecules and applied to investigation of self-assembled monolayers of 7-diethylaminocoumarin and 2,4-dinitrophenylamine. The dipole moment change measured by SPTDC correlates reasonably well with that measured in solution by standard PTDC technique and with semiempirical calculations. Shortening of the excited-state lifetime of surface-immobilized coumarin due to stimulated emission was observed in both fluorescence and dipole measurements. The dipole signal decline in low-polarity solvents indicates the importance of dipole-dipole interaction that causes reorientation of molecules upon photoexcitation.

Original languageEnglish (US)
Pages (from-to)17931-17940
Number of pages10
JournalJournal of Physical Chemistry B
Volume110
Issue number36
DOIs
StatePublished - Sep 14 2006

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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