Effect of substituents at the 4,7-positions on the structural change dynamics of Cu(I) bis(phenanthroline) complexes in the MLCT excited state

Munetaka Iwamura*, Fumiaki Kobayashi, 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

8 被引用数 (Scopus)

抄録

Cu(I) bis(phenanthroline) complexes are known to show rapid structural changes in metal-to-ligand charge-transfer excited states, and the rates of the structural changes decrease with bulkier substituents at the 2,9-positions of phenanthroline. In this work, the structural change dynamics of Cu(I) bis(phenanthroline) complexes with substituents at the 4,7- positions of the ligands were investigated using femtosecond fluorescence upconversion measurements. The time constants of the structural changes for complexes with CH3 and Ph substituents at the 4,7-positions were found to be the same as that of the unsubstituted Cu(I) complex (ca. 200 fs). This clearly indicates that solvent friction with the substituent moiety does not affect the structural change dynamics of the Cu(I) complexes. The structural change dynamics for the substituents at the 2,9- positions were determined to be because of steric effects among the ligands or substituents, rather than the friction of the solvent.

本文言語英語
ページ(範囲)167-169
ページ数3
ジャーナルChemistry Letters
45
2
DOI
出版ステータス出版済み - 2016

ASJC Scopus 主題領域

  • 化学一般

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