Spectroscopic investigations of the entrapment of hematoporphyrin IX in sol-gel prepared silica and silica/titania gels and monoliths

被引：0

作者：

Krüger, JM ^{[1
]}

Breuer, HD ^{[1
]}

机构：

[1] Univ Saarlandes, Inst Phys Chem, D-66123 Saarbrucken, Germany

来源：

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1998年 / 102卷 / 11期

关键词：

energy transfer; fluorescence; porphyrin; sol-gel;

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

By using the sol-gel process, free base porphyrin doped silica and silica/titania, gels, monoliths, and glasses, with up to 20 wt.% titania, have been synthesised. The monoliths were characterised by BET isotherms, X-Ray spectroscopy, and AFM spectroscopy. Absorption and fluorescence spectroscopic measurements indicate that, in Si and Si/Ti-monoliths an equilibrium between the free base hematoporphyrin IX and its dicationic form exists. By additionally doping of pyrene as a donor dye, the energy transfer to hematoporphyrin IX as acceptor was investigated. Stern-Volmer quenching of the fluorescence of pyrene was found in monoliths.

引用

页码：1554 / 1556

页数：3