2003年4月
Intra- and intermolecular photochemical properties of poly(amidoamine) dendrons with an anthracene at focal point
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 76
- 号
- 4
- 開始ページ
- 743
- 終了ページ
- 747
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1246/bcsj.76.743
- 出版者・発行元
- CHEMICAL SOC JAPAN
Photophysical and photochemical properties of poly(amidoamine) dendrons containing an anthracene at the focal point have been studied by the steady-state and transient spectroscopic methods in solution. The fluorescence lifetime of the anthracene moiety in the higher generation dendron (G3.5) is slightly shorter than that of the lower generation homologue (G0.5). On the other hand. the triplet lifetime of G3.5 is longer than that of G0.5. The bimolecular rate constants for energy transfer from the triplet states of the anthracene moiety to O-2 (k(O2)) and for T-T annihilation (k(TT)) were almost the same for the anthryl dendrons, G3.5 and G0.5, suggesting that the dendron groups do not hinder the approach of O-2 or the anthracene moiety. Photodimerization of G3.5 took place at a similar rate to G0.5. while the photodissociation rates of these anthracene dimers increase in the order of anthracene > G0.5 > G3.5, suggesting the presence of some attractive forces between dendron wedges.
- リンク情報
- ID情報
-
- DOI : 10.1246/bcsj.76.743
- ISSN : 0009-2673
- eISSN : 1348-0634
- Web of Science ID : WOS:000182525800006