Picosecond dynamics of excited 9,9′-bianthryl adsorbed on porous glass: Role of symmetry breaking in the ground state

Yasuyuki Tsuboi*, Tamami Kumagai, Masato Shimizu, Akira Itaya, Gerd Schweitzer, Frans C. De Schryver, Tsuyoshi Asahi, Hiroshi Masuhara, Hiroshi Miyasaka

*Corresponding author for this work

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Excited-state dynamics of 9,9′-biantryl (BA) adsorbed on the porous glass, where the large motion of the surrounding medium or intramolecular motion of BA was not plausible, and temperature effects on it were investigated by means of steady-state fluorometry, absorption measurement, picosecond transient absorption spectroscopy, and time-resolved fluorescence measurement. Steady-state fluorescence and transient absorption spectroscopy revealed that the electronic structure of excited BA had strong charge transfer (CT) character as comparable as in the polar solutions both at room temperature and at 77 K, although the dielectric environments estimated by other inter- and intramolecular CT systems were in nonpolar or very weakly polar environments. The time constant of CT was determined to be 5-10 ps at 294 K. The CT time constant was slightly slower (ca. 20 ps) at 77 K but was much faster than that of BA in alcoholic solutions at room temperature. By integrating these results with those in solutions, the rapid CT state formation and the stabilization of the CT state were discussed from the viewpoint of the symmetry breaking in the ground state because of the heterogeneous adsorption of BA onto the glass surface.

Original languageEnglish
Pages (from-to)2067-2073
Number of pages7
JournalJournal of Physical Chemistry A
Volume106
Issue number10
DOIs
StatePublished - 14 Mar 2002

Fingerprint Dive into the research topics of 'Picosecond dynamics of excited 9,9′-bianthryl adsorbed on porous glass: Role of symmetry breaking in the ground state'. Together they form a unique fingerprint.

Cite this