pH-Induced interconversion between J-aggregates and H-aggregates of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin in polyelectrolyte multilayer films

被引：89

作者：

Egawa, Yuya ^{[1
]}

Hayashida, Ryosuke ^{[1
]}

Anzai, Jun-ichi ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Pharmaceut Sci, Sendai, Miyagi 980, Japan

来源：

LANGMUIR | 2007年 / 23卷 / 26期

关键词：

D O I：

10.1021/la701957b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We fabricated a layer-by-layer (LbL) film composed of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) and poly(allylamine) (PAA) and investigated its pH response by UV-visible spectrometry. When the (PAA/TPPS)(5)PAA film was immersed in a pH 1.5 solution, J-aggregate bands were observed at 484 and 691 nm. Above pH 3.0, the J-aggregates were completely dissociated and an H-aggregate band was observed at 405 nm. The interconversion between the J-aggregates and H-aggregates in the LbL film was repeatable and controllable by changing the pH of the solutions.

引用

页码：13146 / 13150

页数：5