13C CPMAS NMR spectroscopy as a versatile and quantitative tool for determination of mercury adsorption capacity in thiol-functionalized mesoporous Silica SBA-1

Hsien Ming Kao, Lung Ping Lee, Arudra Palani

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

13C cross-polarization magic angle spinning (CPMAS) NMR spectroscopy is demonstrated to be a valuable characterization tool for quantitative measurements of Hg2+ adsorption capacity in thiol-functionalized mesoporous silica SBA-1 (Santa Barbara Amorphous-1). This is the first report on the investigation of the spectral change in the 13C CP signals for mercaptopropyl-functionalized mesoporous materials doped with different Hg2+ concentrations. The chemical shift of the carbon atom adjacent to the thiol group is sensitive to the binding of the mercury ion, and its peak intensity can be used as a quantitative sensor for the amount of the mercury ion adsorbed. The 13C CPMAS NMR results are in good agreement with inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analysis.

Original languageEnglish
Pages (from-to)3016-3019
Number of pages4
JournalAnalytical Chemistry
Volume80
Issue number8
DOIs
StatePublished - 15 Apr 2008

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