Characterization of the Acid-Base Properties of Oxide Surfaces by ~(13)C CP/MAS NMR Using Adsorption of Nitromethane

Enrique Lima; Louis Charles de Menorval; Didier Tichit; Monique Lasperas; Patrick Graffin; Francois Fajula

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Characterization of the Acid-Base Properties of Oxide Surfaces by ~(13)C CP/MAS NMR Using Adsorption of Nitromethane

机译：〜（13）C CP / MAS NMR吸附硝基甲烷表征氧化物表面的酸碱性质

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Adsorption of nitromethane on oxide surfaces was monitored using ~(13)C CP/MAS NMR. Stabilization of the aci-anion formed by reaction of nitromethane on acid-base pairs was apparent. A linear relationship between the ~(13)C NMR isotropic chemical shift of the methylene group of the adsorbed aci-anion of nitromethane and the heat of adsorption of CO_2 measured by microcalorimetry was established. The results suggest that nitromethane constitutes an accurate and effective NMR probe for monitoring the basicity of oxide surfaces.

机译：使用〜（13）C CP / MAS NMR监测硝基甲烷在氧化物表面的吸附。硝基甲烷在酸碱对上反应形成的阴离子具有明显的稳定性。建立了由微量量热法测得的硝基甲烷吸附阴离子的亚甲基的〜（13）C NMR各向同性化学位移与CO_2的吸附热之间的线性关系。结果表明，硝基甲烷构成用于监测氧化物表面碱性的准确有效的NMR探针。

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《The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical》 |2003年第17期|共4页
作者
Enrique Lima; Louis Charles de Menorval; Didier Tichit; Monique Lasperas; Patrick Graffin; Francois Fajula;
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正文语种 eng
中图分类物理化学（理论化学）、化学物理学;
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1. Characterization of the Acid-Base Properties of Oxide Surfaces by ~(13)C CP/MAS NMR Using Adsorption of Nitromethane [J] . Enrique Lima, Louis Charles de Menorval, Didier Tichit, The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical . 2003,第17期

机译：〜（13）C CP / MAS NMR吸附硝基甲烷表征氧化物表面的酸碱性质
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3. ~(13)C CP/MAS NMR Study of Cross-linked Poly(vinylpyrrolidone) on Surface of Cerium Oxide Nanoparticles [J] . Toshio Itoh, Noriya Izu, Ichiro Matsubara Chemistry Letters . 2008,第11期

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5. Preparation and characterization of synthetic mineral surfaces: Adsorption and thermal decomposition of tetraethoxysilane on magnesium oxide, molybdenum, and titanium dioxide surfaces. [D] . Jurgens-Kowal, Teresa Ann. 1996

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Characterization of the Acid-Base Properties of Oxide Surfaces by ~(13)C CP/MAS NMR Using Adsorption of Nitromethane

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