Picosecond fluorescence analysis of charge transfer microcrystals by near-field microspectroscopy

Hiroyuki Yoshikawa, Keiji Sasaki, Hiroshi Masuhara*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


A picosecond near-field microspectroscopy system was developed and applied to fluorescence analysis of charge transfer (CT) microcrystals. Fluorescence spectra and decay curves of anthracene/tetrachlorophthalic anhydride/pyromellitic dianhydride (anthracene/TCPA/PMDA) mixed microcrystals were measured with a resolution of ~140 nm. Sub-μm-sized domain structures were observed, and fluorescence spectra and decay curves were different in the domains. Some domains with a common fluorescence spectrum but with different decay curves were observed, indicating an inhomogeneous distribution of quenching sites. New features of inhomogeneity of CT crystals are presented and considered.

Original languageEnglish
Pages (from-to)185-190
Number of pages6
JournalChemical Physics Letters
Issue number3-4
StatePublished - 28 Aug 1998

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