Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India.
Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2019 Apr 5;212:308-314. doi: 10.1016/j.saa.2019.01.014. Epub 2019 Jan 14.
An easily accessible chemo-probe based on physical mixture of 2,4-dimethylpyrrole and 4-nitrobenzaldehyde has been developed. Based on NMR spectroscopic analysis, catalyst free formation of dipyrromethane was observed in the physical mixture of chemo-probe. The probe is utilized in effective colorimetric sensing of copper(II) ions present in environmental solutions by instantaneous appearance of red colour, even in the co-existence of various metal ions. The lowest detection limit of 2.51 μM for this chemo-probe towards copper(II) sensing is significantly lower than the WHO prescribed level (<30 μM of copper(II) ions) in potable water. The sensing mechanism is explained via rapid formation of bis(dipyrrinato)copper(II) complex, as confirmed by Jobs plot, UV-Vis spectroscopy and IR spectroscopy.
已经开发出一种基于 2,4-二甲基吡咯和 4-硝基苯甲醛物理混合物的易于使用的化学探针。基于 NMR 光谱分析，在化学探针的物理混合物中观察到无催化剂形成二吡咯甲烷。该探针可有效比色检测环境溶液中存在的铜（II）离子，即使在存在各种金属离子的情况下，也会立即呈现红色。该化学探针对铜（II）的检测的最低检测限为 2.51 μM，明显低于世界卫生组织规定的饮用水中铜（II）离子（<30 μM）的水平。通过 Jobs 图、紫外-可见光谱和红外光谱证实，通过快速形成双（二吡咯烷）铜（II）配合物来解释传感机制。
