Ionic photodissociation of excited electron donor-acceptor systems. II. The importance of the chemical property of donor-acceptor pairs

T. Hino, H. Akazawa, Hiroshi Masuhara*, N. Mataga

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

The relationship between the ionic photodissociation yield and the electron donor-acceptor interaction of pyrene-quencher systems was investigated by nanosecond laser photolysis and transient photocurrent measurements. While no general relation was obtained, the chemical property of donor-acceptor pairs was found to be reflected in the yield. On the basis of the present and previous results it was concluded that the ionic photodissociation process consists of two steps, namely, the encounter collisional electron transfer and the orientational relaxation of solvents. With the latter process some other radiationless transitions depending on the chemical property compete in the dissociative excited state. It was shown in the case of pyrene-nitrile systems that an unknown quenching process, other than ionic dissociation as well as triplet formation, increases with the electron affinity.

Original languageEnglish
Pages (from-to)33-37
Number of pages5
JournalJournal of Physical Chemistry
Volume80
Issue number1
DOIs
StatePublished - 1 Jan 1976

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