Synthesis and Steady-State Spectroscopic Study of 5-Aryl-2,2′-bipyridyls. New Fluorescent Compounds in Solid State

DOI DOI PDF Web Site 研究データあり 被引用文献7件 参考文献73件

書誌事項

タイトル別名
  • Synthesis and Steady-State Spectroscopic Study of 5-Aryl-2,2'-bipyridyls. New Fluorescent Compounds in Solid State
公開日
2006
DOI
  • 10.1246/bcsj.79.602
  • 10.1002/chin.200634140
公開者
公益社団法人 日本化学会

この論文をさがす

説明

The absorption and fluorescent properties of newly synthesized 5-aryl-2,2′-bipyridyls were examined both in solution and in the solid state. The 6-methoxy derivatives 5a–5c have weak fluorescence, whereas 6-amino derivatives 7a–7f showed strong fluorescence. Their spectroscopic properties were computationally analyzed using semi-empirical molecular orbital calculations. The geometries of the ground (S0) and the first singlet excitation states (S1) were optimized and employed to estimate the vertical transition energies. The drastic differences in fluorescent intensities between 5a–5c and 7a–7f can be qualitatively explained by the relative energy levels S1 and the neighboring triplet level; the energy gaps supposedly regulate the non-radiative intersystem crossing (ISC) probabilities. On the relaxed S1 geometry, 5a–5c have quite small S1–triplet energy gaps, whereas 7a–7f have no such quasi-degeneracies, leading to their quantitatively different quantum yields.

収録刊行物

被引用文献 (7)*注記

もっと見る

参考文献 (73)*注記

もっと見る

関連研究データ

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ