title: 13C CPMAS NMR spectroscopy as a versatile and quantitative tool for determination of mercury adsorption capacity in thiol-functionalized mesoporous silica SBA-1.
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.
authors.affiliation: Department of Chemistry, National Central University, Chung-Li, Taiwan 32054, ROC. hmkao@cc.ncu.edu.tw
authors.forename: Hsien-Ming
authors.initials: HM
authors.lastname: Kao
authors.forename: Lung-Ping
authors.initials: LP
authors.lastname: Lee
authors.forename: Arudra
authors.initials: A
authors.lastname: Palani