磷酸二氢根离子对香豆肼化合物的高选择性荧光增强  

Fluorescent Emission of Coumaric Aldehyde Molecule Enhanced by Dihydrogen Phosphate

作　　者：张亚男[1] 杨林林[1] 周硼[1] 段春迎[1] 

机构地区：[1]大连理工大学化学系精细化工国家重点实验室,辽宁大连116024

出　　处：《发光学报》2011年第9期962-967,共6页Chinese Journal of Luminescence

基　　金：国家自然科学基金(20801018)资助项目

摘　　要：设计合成了荧光探针N,N-二乙基氨基香豆素-3-肼基-2,4-二硝基苯肼(DC)。光谱滴定实验显示,H2PO 4-与DC能够以1∶1的化学计量比形成配合物。进一步的实验发现,和相同含量的DC溶液相比,该配合物溶液的相对光致荧光强度显著增强,同时伴有紫外吸收光谱红移,溶液颜色由橙黄色迅速变为紫色。其它阴离子,如F-、NO3-、Cl-、Br-、I-等对DC溶液的相对荧光强度及紫外吸收光谱没有影响。利用DC对H2PO 4-具有灵敏选择性的特征,可把N,N-二乙基氨基香豆素-3-肼基-2,4-二硝基苯肼作为荧光探针,借助于荧光光谱和紫外-可见吸收光谱两种手段,实现对H2PO4-离子的快速识别。By combining 7-diethylamino-2-oxo-2H-chromene-3-carbohydrazide with 2,4-dinitrophenylhydrazine into one molecule,fluorescent probe [7-diethylamino-2-oxo-N′-2,4-dinitrophenylhydrazine-2H-chromene-3-carbohydrazide]（DC） was synthesized for dsetection of H2PO-4 in acetonitrile.Spectrophotometric titration indicated the formation of a 1∶1 complex of H2PO-4 with DC.With the fluorescence spectra,the apparent red shift of UV absorption and the changes for the solution color from orange yellow to purple were observed as binding DC with H2PO-4.The experiment showed that DC was highly selective for H2PO-4,much more than those anions such as F-,NO-3,Cl-,Br-and I-.By the exclusive selectivity of DC to H2PO-4,it was predicted that as a fluorescent probe,and by means of fluorescence and UV-Visible absorption spectrum,H2PO-4can be rapidly identified by a enhanced fluorescence from DC.

关 键 词：荧光探针 H2PO4- 光致荧光 

分 类 号：O482.31[理学—固体物理]