Localization of a charge transfer excited state in molecular crystals: A direct confirmation by femtosecond diffuse reflectance spectroscopy

Tsuyoshi Asahi*, Yasutaka Matsuo, Hiroshi Masuhara

*Corresponding author for this work

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

Transient absorption spectra of the durene-pyromellitic dianhydride (PMDA) charge transfer (CT) crystal, PMDA-doped durene crystal and its molten state were measured by femtosecond diffuse reflectance spectroscopy, and electronic structure and dynamics of the excited state in the CT crystal are discussed. It is directly confirmed that the excited CT singlet state is almost localized (self-trapped) in one donor(D)-acceptor(A) unit within a few picoseconds after excitation. The electronic structure of the excited state is quite polar but it is not an electron transfer state from D to A.

Original languageEnglish
Pages (from-to)525-530
Number of pages6
JournalChemical Physics Letters
Volume256
Issue number4-5
DOIs
StatePublished - 5 Jul 1996

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