Sarkar Deblina, Pramanik Ajoy Kumar, Mondal Tapan Kumar
Department of Chemistry, Jadavpur University, Kolkata 700032, India.
Department of Chemistry, Jadavpur University, Kolkata 700032, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jan 15;153:397-401. doi: 10.1016/j.saa.2015.08.052. Epub 2015 Sep 3.
A highly sensitive and selective benzimidazole based colourimetric chemosensor (HL) for the efficient detection of Ni(2+) has been reported. The synthesized chemosensor HL is highly efficient in detecting Ni(2+) over other metal ions that commonly coexist with Ni(2+) in physiological and environmental samples. HL also shows distinct color change from orange yellow to blue visible under the naked eye due to specific binding with Ni(2+). This color change corresponds to a large red shift of the UV-Vis spectrum from 403 nm to 600 nm with a distinct isosbestic point at around 500 nm. The cation sensing property of the receptor HL has been examined by UV-Vis spectroscopy. Electronic structure of the HL-Ni(2+) complex and sensing mechanism has been interpreted by DFT and TDDFT calculations.
据报道，一种基于苯并咪唑的高灵敏度、高选择性比色化学传感器（HL）可有效检测Ni(2+)。合成的化学传感器HL在检测Ni(2+)方面比生理和环境样品中通常与Ni(2+)共存的其他金属离子更高效。由于与Ni(2+)特异性结合，HL还呈现出肉眼可见的从橙黄色到蓝色的明显颜色变化。这种颜色变化对应于紫外可见光谱从403 nm到600 nm的大红移，在500 nm左右有一个明显的等吸收点。受体HL的阳离子传感特性已通过紫外可见光谱进行了研究。HL-Ni(2+)配合物的电子结构和传感机制已通过密度泛函理论（DFT）和含时密度泛函理论（TDDFT）计算进行了解释。
