Selective fluorescent sensor for mercury ions in aqueous media using a 1,4-dihydropyridine derivative
作者:Daranee Homraruen、Thirawat Sirijindalert、Luxsana Dubas、Mongkol Sukwattanasinitt、Anawat Ajavakom
DOI:10.1016/j.tet.2012.11.094
日期:2013.2
hydrolysis of the triester. These DHP derivatives are readily soluble in aqueous media buffered at pH 8.0 and the solutions give blue fluorescent signals with quantum yields of 7–23%. One of these compounds, bearing a p-methoxyphenyl N-substituted group, shows specific fluorescent quenching with the mercuric ion (Hg2+). The fluorescent signal of the DHP derivative decays over a period of minutes to hours
通过N-取代的β-氨基丙烯酸酯的环三聚,然后将三酯进行碱性水解,合成了含有3个羧酸单元的新型1,4-二氢吡啶(DHP)衍生物。这些DHP衍生物易于溶于缓冲在pH 8.0的水性介质中,该溶液发出蓝色荧光信号,量子产率为7-23%。这些带有对-甲氧基苯基N-取代基的化合物之一显示出用汞离子(Hg 2+)的特异性荧光猝灭。DHP衍生物的荧光信号会在几分钟到几小时内衰减,具体取决于Hg 2+的浓度,这意味着传感机制涉及Hg 2+之间的化学反应。离子和DHP化合物。的1个H NMR和MS数据表明汞2+的DHP环介导氧化成吡啶环。该事件可用于在30分钟内以微摩尔水平荧光检测Hg 2+,在水性介质中的检测极限为0.2μM。