A New Fluorescent “Off-On” Sensor for Al3+ Derived from L-alanine and Salicylaldehyde
作者:Smita Sarma、Pradip Kr. Bhattacharyya、Diganta Kumar Das
DOI:10.1007/s10895-015-1647-5
日期:2015.9
The condensation product of L-alanine and salicylaldehyde was synthesised and characterised which was found to be selective fluorescent “on” sensor for Al3+ ion with the detection limit 10−6 M. The sensor is free of interferences from metal ions - Na+, K+, Ca2+, Mn2+, Co2+, Ni2+, Cu2+, Pb2+, Cd2+, Hg2+ and Fe3+. The Fluorescence and the UV/visible spectral data reveals a 1:1 interaction between the sensor and Al3+ ion with binding constant 104.5. The DFT and TDDFT calculations confirm the structures of the sensor and the sensor-Al3+ complex.
L-丙氨酸和水杨醛的缩合物被合成并进行了表征,发现其是Al3+离子的选择性荧光“开启”传感器,检测限为10−6 M。该传感器不受金属离子(Na+、K+、Ca2+、Mn2+、Co2+、Ni2+、Cu2+、Pb2+、Cd2+、Hg2+和Fe3+)的干扰。荧光和紫外/可见光谱数据显示传感器与Al3+离子之间存在1:1相互作用,结合常数为104.5。DFT和TDDFT计算证实了传感器和传感器-Al3+复合物的结构。