摘要
以若丹明6G、水合肼和原甲酸三乙酯为原料合成了一种新型的若丹明类荧光探针化合物。采用IR、1H NMR、13C NMR、HRMS进行了结构表征,并对其荧光性能进行了研究,结果表明该探针对Hg2+有很好的识别作用。在水和甲醇体系中,探针分子溶液为无色;加入Hg2+,探针分子的最大吸收波长为510nm,荧光强度的最大发射波长为551nm,探针溶液则呈现浅粉红色,而常见的其他金属离子对其干扰小。当p H小于3.80时,荧光强度显著增加,并显示明亮的粉红色;当p H大于3.80以后,荧光迅速减弱,溶液呈现无色,该探针也可以作为p H探针使用。
A novel rhodamine-based derivative conjugated fluorescent probe was designed and synthesized from rhodamine 6G、hydrazine hydrate and triethoxy methane. Its structure were characterized by IR,1H NMR,13 C NMR,and HRMS. Meanwhile,the properties of the fluorescent probe were investigated. The results indicated that the probe exhibits very strong fluorescence response and has good recognition effect to Hg2 +. The maximum absorption peak of the probe molecule appeared at 510 nm and the maximum emission peak of the probe molecule appeared at 551 nm in water / methanol solution after additing Hg2 +. Meanwhile,the color of the solution changed from colorless to light pink. So we can clearly detect Hg2 +by a ‘naked-eye'manner. The obstruction for other common metal ions was weak. p H titration shown that when the p H is lower than 3. 80,the intensity of fluorescence increased obviously,and the color of the solution is bright pink; on the contrary,when the p H is higher than 3. 80,the intensity of fluorescence weakened rapidly,the solution is colorless. This probe can also be used as a p H probe.
出处
《化学通报》
CAS
CSCD
北大核心
2015年第3期259-263,共5页
Chemistry
基金
国家自然科学基金项目(21042002)
陕西省自然科学基金项目(2010JM2001)资助
关键词
Hg2+
荧光传感
裸眼识别
探针
PH
Hg2+,Fluorescent sensors,Naked-eye recognition,Probe,pH
