一种ph 荧光特性物质的合成及其特性研究.pdfVIP

中国环境科学 2012,32(1) ：168~172 China Environmental Science 一种 pH 荧光特性物质的合成及其特性研究 * 马永山 ,吴俊森,刘 雷,张 超 ( 山东建筑大学市政与环境工程学院, 山东 济南 250101) 摘要：合成并表征了化合物:N,N-二苯丙氨酸铵-3,4,9,10-苝四羧酸二酰亚胺(PDCDA).研究了 pH 值变化对其水溶液可见吸收光谱和荧光 发射光谱的影响,探讨了荧光强度变化的机理,并利用 PDCDA 构建了具有“开-关”特性的 pH 荧光传感器.结果表明,PDCDA 化合物水溶性 好、荧光量子产率高,荧光强度与 pH 值间有着强烈的依赖关系,在碱性及中性溶液中荧光强度较强且稳定,而在酸性溶液中荧光被淬 灭,PDCDA 在一个非常窄的 pH 范围内荧光强度发生了明显的变化, pH 值的改变对发光团 π-π 堆积产生影响进而导致其荧光发射光谱和 可见吸收光谱发生改变.PDCDA 可用作水溶液的 pH 荧光传感器,检测 pH 值范围为 3.8~6.3. 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 中图分类号：X830 文献标识码：A 文章编号：1000-6923(2012)01-0168-05 * Synthesis and characterization of a pH fluorescence compound. MA Yong-shan , WU Jun-sen, LIU Lei, ZHANG Chao (School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China). China Environmental Science, 2012,32(1)：168~172 Abstract ：N, N-bi(L-phenylalanine amine)-perylene-3,4; 9,10-dicarboxylic diimide(PDCDA)was synthesized and characterized. The absorbance and fluorescence of PDCDA (10-5 mol/L) in aqueous solution were studied by varied pH values. The mechanism of the fluorescence indensity change was also discussed. And a fluorescent pH sensor was designed with PDCDA. It was water-soluble and had high fluorescent quantum yield. The fluorescence intensity of PDCDA was strongly dependent on pH, which was strong and stable in alkaline or neutral solution and was weakened in acid solution. The fluorescence intensity of PDCDA changed obviously even in a small pH range. The π-π stacking caused by pH led to the change of flourescence spectrum and absorption spectrum ．The PDCDA can be used as a fluorescent pH sensor and the pH detection range was 3.8~6.3. Key words ：perylene diimide derivative