An exemplary relationship between the extent of cofacial aggregation and fluorescence quantum yield as exhibited by quaternized amphiphilic phthalocyanines

被引：22

作者：

Tasso, Thiago Teixeira ^{[1
]}

Yamasaki, Yasuhiro ^{[2
]}

Furuyama, Taniyuki ^{[1
]}

Kobayashi, Nagao ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Dept Chem, Sendai, Miyagi 9808578, Japan

[2] Orient Chem Ind Co Ltd, Dept New Business, Neyagawa, Osaka 5728581, Japan

来源：

DALTON TRANSACTIONS | 2014年 / 43卷 / 15期

关键词：

ZINC PHTHALOCYANINES; MAIN ABSORPTION; 1000; NM; DERIVATIVES;

D O I：

10.1039/c4dt00195h

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The aggregation equilibrium of a series of positively-charged water-soluble phthalocyanines (Pcs) was studied in aqueous solution by means of absorption and fluorescence techniques. The aggregation equilibrium in water depends on the bridging atoms between the pyridyl groups and the Pc core, and on the central metal of the Pcs, while N-alkyl groups are virtually uninvolved in the aggregation properties. Thus, in the water-methanol mixture, the aggregation tendency increased in the order of Zn < Cu <= Ni, Pd when the ligand is the same, while the bridging element sulfur gives much more propensity for aggregation compared to oxygen. The fluorescence quantum yields of the Pcs showed an excellent correlation with the extent of aggregation.

引用

页码：5886 / 5892

页数：7