Chiral bis(oxazoline) ruthenium complexes with bipyridyl-type N-heteroaromatics: Comparative stereochemical and photochemical characterization of their ∇- And Δ-diastereomeric geminate isomers

Masayoshi Onishi*, Yoko Tashiro, Yasuhiro Arikawa, Junko Nagaoka, Keisuke Umakoshi, Yusuke Sunada, Koichi Nozaki

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

2 被引用数 (Scopus)

抄録

Diastereomeric geminate pairs of chiral bis(2-oxazoline) ruthenium complexes with bipyridyl-type N-heteroaromatics, λ- and Δ-[Ru(L-L)2(iPr-biox)]2+ (iPr-biox=(4S,4′S)-4, 4′-diisopropyl-2,2′-bis(2-oxazoline); L-L=2,2′-bipyridyl (bpy) for 1 λ and 1 Δ, 4,4′-dimethyl-2,2′-bipyridyl (dmbpy) for 2 λ and 2 Δ, and 1,10-phenanthroline (phen) for 3 λ and 3 Δ), were separated as BF4 and PF6 salts and were subjected to the comparative studies of their stereochemical and photochemical characterization. DFT calculations of 1 λ and 1 Δ electronic configurations for the lowest triplet excited state revealed that their MO-149 (HOMO) and MO-150 (lower SOMO) characters are interchanged between them and that the phosphorescence-emissive states are an admixture of a Ru-to-biox charge-transfer state and an intraligand excited state within the iPr-biox. Furthermore, photoluminescence properties of the two λ,Δ- diastereomeric series are discussed with reference to [Ru(bpy)3] 2+.

本文言語英語
ページ(範囲)1405-1415
ページ数11
ジャーナルChemistry - An Asian Journal
6
6
DOI
出版ステータス出版済み - 2011/06/06

ASJC Scopus 主題領域

  • 生化学
  • 有機化学

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