分析化学2012，Vol.40Issue(1)：77-82,6.DOI:10.3724/SP.J.1096.2012.10358
响应范围可调的pH荧光传感器的构建及其性能研究
Synthesis and Characterization of a pH Fluorescence Sensor with Tunable Response Range
摘要
Abstract
N,N'-bi(L-glutamic amine)-perylene-3,4;9,10-dicarboxylic diimide(PTCDG)was synthesized and characterized. The compound abovementioned was water-soluble and had high fluorescent quantum yield. A set of novel fluorescent pH sensors with tunable response range were designed based on the PTCDG, which could react with paramagnetic Fe3+ to form a 1:1 complex. The association constant was 6. 5 X 105. The effects of foreign ions were examined and it was shown that PTCDG has a good selectivity to Fe3+. The PTCDG could coordinate the paramagnetic Fe3+ ions to switch off itself by PET quenching and could release Fe3+ to turn on the fluorescence again by forming Fe(OH)3 as the pH increase. Moreover, under the conditions of different good ligands for Fe3+ , the formation of Fe(OH)3 moves to the alkaline pH range direction. The tunable response pH range covers 4. 0 - 10.0 (4.0-6. 0 for PTCDG, 5. 0-10. 0 for PTCDG/Fe3 + , 5. 0-7. 0 for PTCDG/Fe3+ /triethyl-amine, 6. 0 - 8. 0 for PTCDG/Fe3+/pyridine, 7. 0 - 9. 0 for PTCDG/Fe3+/phenanthroline). The effects of the internal interference were investigated and the pH sensing mechanism was also discussed. The pH sensor had many excellent properties, such as tunable response range including the nearly neutral environment, obvious change of fluorescence and color, fast response and high sensitivity.关键词
苝二酰亚胺/水溶性/pH荧光传感器/吸收光谱/荧光光谱Key words
Perylene diimide derivative/Water-soluble/pH probe/Absorption spectrum/Floures-cence spectrum引用本文复制引用
马永山,张凤霞,李培刚,吴俊森,任会学..响应范围可调的pH荧光传感器的构建及其性能研究[J].分析化学,2012,40(1):77-82,6.基金项目
本文系水体污染控制与治理科技重大专项(No.2008ZX07422-001)、山东省自然科学基金(No.Y200B42)及山东建筑大学开放实验项目(No.2009030)资助 （No.2008ZX07422-001）
