Infrared vibrational spectroscopy of [Ru(bpy)2(bpm)] 2+ and [Ru(bpy)3]2+ in the excited triplet state

Tatsuhiko Mukuta, Naoto Fukazawa, Kei Murata, Akiko Inagaki, Munetaka Akita, Sei'Ichi Tanaka, Shin Ya Koshihara, Ken Onda

研究成果: Contribution to journalArticle

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This work involved a detailed investigation into the infrared vibrational spectra of ruthenium polypyridyl complexes, specifically heteroleptic [Ru(bpy)2(bpm)]2+ (bpy = 2,2′-bipyridine and bpm = 2,2′-bipyrimidine) and homoleptic [Ru(bpy)3]2+, in the excited triplet state. Transient spectra were acquired 500 ps after photoexcitation, corresponding to the vibrational ground state of the excited triplet state, using time-resolved infrared spectroscopy. We assigned the observed bands to specific ligands in [Ru(bpy)2(bpm)]2+ based on the results of deuterium substitution and identified the corresponding normal vibrational modes using quantum-chemical calculations. Through this process, the more complex vibrational bands of [Ru(bpy)3] 2+ were assigned to normal vibrational modes. The results are in good agreement with the model in which excited electrons are localized on a single ligand. We also found that the vibrational bands of both complexes associated with the ligands on which electrons are little localized appear at approximately 1317 and 1608 cm-1. These assignments should allow the study of the reaction dynamics of various photofunctional systems including ruthenium polypyridyl complexes.

元の言語英語
ページ(範囲)2481-2490
ページ数10
ジャーナルInorganic chemistry
53
発行部数5
DOI
出版物ステータス出版済み - 3 3 2014
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

フィンガープリント Infrared vibrational spectroscopy of [Ru(bpy)<sub>2</sub>(bpm)] <sup>2+</sup> and [Ru(bpy)<sub>3</sub>]<sup>2+</sup> in the excited triplet state' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Mukuta, T., Fukazawa, N., Murata, K., Inagaki, A., Akita, M., Tanaka, SI., Koshihara, S. Y., & Onda, K. (2014). Infrared vibrational spectroscopy of [Ru(bpy)2(bpm)] 2+ and [Ru(bpy)3]2+ in the excited triplet state. Inorganic chemistry, 53(5), 2481-2490. https://doi.org/10.1021/ic402474t