Chemosensors displaying pH controlled multistage fluorescence emission

被引:20
作者
Pina, F [1 ]
Melo, MJ
Bernardo, MA
Luis, SV
García-España, E
机构
[1] Univ Nova Lisboa, Ctr Quim Fina & Biotecnol, Dept Quim, P-2825 Monte De Caparica, Portugal
[2] Univ Valencia, Fac Farm, Dept Quim Organ, Valencia 46100, Spain
关键词
D O I
10.1016/S1010-6030(99)00102-1
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
A large number of systems displaying pH controlled multistages of fluorescence emission intensity, have not been recognized from this point of view. In this work we present two paradigmatic cases: (i) polyamine receptors linked to a fluorophore unit, in which the signal is modulated by an intra-molecular pH dependent electron transfer process, (ii) phenols presenting adiabatic excited state proton transfer. In the first example the chemosensors are constituted by a receptor unit containing a polyaza moiety suitable for binding protons (but also metal ions or anions). The receptor is linked to a benzene or naphthalene unit that acts as a fluorophore. The fluorescence signal is dependent on the protonation state of the receptor. In the second example, addition of buffers are used to tune the intensity of the fluorescence emission. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:65 / 69
页数:5
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