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A Hydrogen‐Bond‐Assisted CHEF Approach for Colorimetric and Fluorescence Recognition of Picric Acid and Its Solid‐Phase Extraction by an Immobilized Probe
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-06-12 , DOI: 10.1002/slct.201800870
Milan Ghosh 1 , Sabyasachi Ta 1 , Mahuya Banerjee 1 , Md Mahiuddin 1 , Debasis Das 1
Affiliation  

Two rhodamine derivatives derived from rhodamine B, salicyaldehyde (L) and benzaldehyde (R1) having ether spacer have been prepared and characterised by spectroscopic techniques. One of them (L) is very efficient to detect picric acid (PA) by colorimetric and fluorescence method while the other (R1) serves as model compound to unveil sensing mechanism. The probe (L) recognizes PA through hydrogen bond assisted Chelation Enhanced Fluorescence (CHEF) process in a ratiometric manner in aqueous‐methanol (4/1, v/v). The silica immobilised probe is suitable for highly efficient solid phase extractive removal of PA from environmental samples. The experimental results have been substantiated by DFT studies.

中文翻译:

氢键辅助的CHEF方法用于苦味酸的比色和荧光识别以及固定探针的固相萃取

已经制备了两种若丹明B衍生的若丹明衍生物,具有醚间隔基的水杨醛(L)和苯甲醛(R1),并通过光谱技术对其进行了表征。其中一个(L)通过比色法和荧光法非常有效地检测苦味酸(PA),而另一个(R1)作为模型化合物揭示了传感机制。探针(L)在甲醇水溶液(4/1,v / v)中以比例方式通过氢键辅助的螯合增强荧光(CHEF)过程识别PA。二氧化硅固定探针适用于从环境样品中高效固相萃取去除PA。DFT研究证实了实验结果。
更新日期:2018-06-12
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