First Observation of the Photoexcited Quintet State in Fullerene Linked with Two Nitroxide Radicals

Norikazu Mizuochi, Yasunori Oba, Seigo Yamauchi

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62 Citations (Scopus)

Abstract

The bisadduct of fullerene (1) having two nitroxide radicals at the trans-3 position was newly synthesized. The ground and photoexcited states of 1 were studied by continuous-wave and pulsed two-dimensional electron paramagnetic resonance spectroscopy. An exchange interaction between the radicals was evaluated to be much smaller than an isotropic hyperfine splitting, showing a doublet (S = 1/2) character in the ground state. It was found from a 2D nutation spectrum that a photoexcited state has a quintet character (S = 2) which is generated via interactions between photoexcited triplet fullerene (S = 1) and the two nitroxide radicals (S = 1/2).

Original languageEnglish
Pages (from-to)7749-7752
Number of pages4
JournalJournal of Physical Chemistry A
Volume103
Issue number39
DOIs
Publication statusPublished - 1999 Jan 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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