Selective Optical Sensing of Hg(II) in Aqueous Media by H-Acid/SBA-15: A Combined Experimental and Theoretical Study

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• 作者：Pezhman Zarabadi-Poor ; Alireza Badiei ; Ali Akbar Yousefi ; Joaqu铆n Barroso-Flores
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：May 9, 2013
• 年：2013
• 卷：117
• 期：18
• 页码：9281-9289
• 全文大小：526K
• 年卷期：v.117,no.18(May 9, 2013)
• ISSN：1932-7455

文摘

The H-acid dye intermediate was successfully attached to the SBA-15 mesoporous silica surface in a two-step modification process. Synthesized materials were characterized using several techniques including Fourier transform infrared spectroscopy, N2 adsorption鈥揹esorption measurements, small-angle X-ray scattering, transmission electron microscopy, and thermogravimetric analysis. The fluorescent sensing properties were examined in the final product toward several metal ions and showed high selectivity for Hg²⁺. Computational studies were performed in order to obtain a detailed electronic description of the quenching mechanism of H-acid fluorescence by Hg²⁺ as well as studying the structure and bonding in the [H-acid]Hg²⁺ complex.