Das Trisha, Roy Ankita, Uyama Hiroshi, Roy Partha, Nandi Mahasweta
Integrated Science Education and Research Centre, Siksha Bhavana, Visva-Bharati University, Santiniketan-731235, India.
Dalton Trans. 2017 Jun 6;46(22):7317-7326. doi: 10.1039/c7dt00369b.
Mesoporous silica functionalized with a 2-hydroxy-naphthyl moiety has been synthesized and characterized by standard techniques like powder X-ray diffraction, N adsorption/desorption studies, transmission electron microscopy and spectral studies like FT-IR, UV-visible, fluorescence and C and Si solid state NMR. The functionalized silica material showed significant enhancement in its emission intensity in the presence of Al ions whereas other metal ions could not bring about any increase in its emission intensity. They either quench the emission or do not alter the intensity significantly making the functionalized material a fluorescence chemosensor for Al. The sensitivity of the probe towards Al has been determined to be high with a low limit of detection value. As functionalized silica is not soluble in common solvents, it has been effectively used to bind and remove Al from a solution. Theoretical calculations on a model system have been performed to investigate the electronic spectral transitions.
已合成了用2-羟基萘基部分官能化的介孔二氧化硅，并通过粉末X射线衍射、N吸附/脱附研究、透射电子显微镜以及傅里叶变换红外光谱（FT-IR）、紫外可见光谱、荧光光谱和碳与硅固态核磁共振等标准技术对其进行了表征。在铝离子存在下，官能化二氧化硅材料的发射强度显著增强，而其他金属离子不会使其发射强度增加。它们要么淬灭发射，要么不会显著改变强度，这使得官能化材料成为铝的荧光化学传感器。已确定该探针对铝的灵敏度很高，检测下限值很低。由于官能化二氧化硅不溶于常见溶剂，它已被有效地用于从溶液中结合和去除铝。已对模型系统进行了理论计算，以研究电子光谱跃迁。
