全文下载:2014020115
李国振, 王明慧*
(青岛科技大学 化学与分子工程学院,山东 青岛 266042)
摘要: 合成了基于二氟荧光素内酰胺开环反应的一氧化氮分子荧光探针并对其结构进行了表征。二氟荧光素内酰胺本身无荧光,当与NO反应后开环水解生成二氟荧光素,在λex=484 nm光激发下产生荧光且最大发射波长λem =514 nm。在pH>48的体系中二氟荧光素内酰胺与NO反应后荧光强度达最大且稳定。在H2O2、·OH、O-2、NO-2、ONOO-存在下,荧光探针对NO表现出很高的选择性。以NOC 13为NO释放剂,荧光强度随NOC 13浓度的增加而增大,可实现对NO的直接检测。
关键词: 荧光探针; 一氧化氮; 荧光素; 二氟荧光素内酰胺
中图分类号: O 656.3文献标志码: A
Synthesis and Application of 2′,7′Difluorfluorescein Spirolactam Based Probe for Nitric Oxide
LI Guozhen, WANG Minghui
(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042,China)
Abstract: Nitric oxide (NO) is an important mediator involved physiological phenomena. 2′,7′Difluorfluorescein spirolactam as fluorescent probe for NO was synthesized and characterized. The complex himself shows nonfluorescent, when reacted with NO it forms difluorfluorescein which shows a strong fluorescent peak at λem=514 nm in λex=484 nm. The fluorescent probe exhibits excellent selectivity to NO in the appearance of H2O2, ·OH, O-2, NO-2, ONOO-. The fluorescence intensity was increased by increasing concentration of NOC 13 as NO carrier, hence NO can be determined directly through measuring fluorescence intensity.
Key words: fluorescent probe; nitric oxide; fluorescein; 2′,7′difluorfluorescein spirolactam
收稿日期: 20130115
基金项目: 山东省自然科学基金项目(ZR2009BM019).
作者简介: 李国振(1988—),男,硕士研究生.*通信联系人.