Novel excited quintet state in porphyrin: Bis(quinoline-TEMPO)-yttrium- tetraphenylporphine complex

Luca Maretti, Saiful S.M. Islam, Yasunori Ohba, Takashi Kajiwara, Seigo Yamauchi

研究成果: Article査読

9 被引用数 (Scopus)

抄録

New mono- and bis[4-(3-hydroxy-2-methyl-4-quinolinoyloxy)-2,2,6,6- tetramethylpiperidin-1-oxyl](meso-tetraphenylporphyrinato)yttrium-(III) complexes have been synthesized, and the properties of the excited states generated by photoexcitation of porphyrin were studied by time-resolved (TR) and pulsed two-dimensional electron paramagnetic resonance (EPR) spectroscopy. A TR-EPR spectrum was observed in the quartet (S = 3/2) or quintet (S = 2) states generated from interactions of one or two radicals with the photoexcited triplet state of the porphyrin. The zero-field splitting D values of these states were analyzed in terms of those of the triplet and the radical-triplet pair. The spin states of the excited states were definitely assigned by measuring the nutation frequencies with pulsed EPR.

本文言語English
ページ(範囲)9125-9127
ページ数3
ジャーナルInorganic chemistry
44
25
DOI
出版ステータスPublished - 2005 12 12

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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