FLUORESCENT PHOTOINDUCED ELECTRON-TRANSFER SENSORS - THE SIMPLE LOGIC AND ITS EXTENSIONS

被引:0
作者
BISSELL, RA
DE SILVA, AP
GUNARATNE, HQN
LYNCH, PLM
MCCOY, CP
MAGUIRE, GEM
SANDANAYAKE, KRAS
机构
来源
FLUORESCENT CHEMOSENSORS FOR ION AND MOLECULE RECOGNITION | 1993年 / 538卷
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中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The principle of photoinduced electron transfer is combined with the modular system 'Fluorophore-Spacer-Receptor' to develop the phenomenon of cation-responsive fluorescence. pH controlled 'on-off' fluorescence is demonstrated in the case of the dialkylaminoalkyl heterocyclic derivative 1a. The modular system is then extended in two directions. In the first of these, targetting/anchoring modules are added to allow the investigation of proton fields in microheterogeneous membrane media with high spatial resolution. The sensor family 2a-f is the realization of this approach. The second direction employs phosphorescent (instead of fluorescent) modules with/without protective shields to permit the development of phosphorescent pH sensing in an interference-free manner within intrinsically fluorescent environments. Sensors like 3 in aqueous beta-cyclodextrin solution illustrate the possibilities of this idea.
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页码:45 / 58
页数:14
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