Fluorescent 4-(2,2,6,6-tetramethylpiperidin-4-ylamino)-1,8-naphthalimide pH chemosensor based on photoinduced electron transfer

被引：68

作者：

Bojinov, Vladimir B. ^{[1
]}

Konstantinova, Temenushka N. ^{[1
]}

机构：

[1] Univ Chem Technol & Met, Dept Organ Synth, BU-1756 Sofia, Bulgaria

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2007年 / 123卷 / 02期

基金：

美国国家科学基金会;

关键词：

4-amino-1,8-naphthalimide; 2,2,6,6-tetramethylpiperidine; fluorescence; optical sensor; pH sensing; photoinduced electron transfer (PET);

D O I：

10.1016/j.snb.2006.10.035

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Two isomeric 2,2,6,6-tetramethylpiperidinyl-4-amino-1,8-naphthalimides 5 and 7 were configured as "fluorophore-spacer-receptor" systems. Photophysical characteristics of the dyes were investigated in water/DMF (4:1, v/v) solution. Compound 5, which lacks the amino receptor at the 1,8-naphthalimide 4-amino moiety, did not show any changes in the emission properties as a function of pH. In contrast to compound 5, 4-(2,2,6, 6-tetramethylpiperidin-4-ylami no) - 1, 8 -naphthalimide 7 displayed "on-off' switching in its fluorescence as a function of pH. From the luminescent changes pK(a) value of 8. 18 was determined. This indicates that the chemosensor 7 would be able to act as highly efficient "off-on" fluorescent switcher for pH. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：869 / 876

页数：8

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