Volume 92 Issue 37 | p. 29 | Concentrates
Issue Date: September 15, 2014

Revealing Surface Siloxane Structure With Silicon-29 NMR

Dynamic nuclear polarization reduces analysis time from months to days
Department: Science & Technology
News Channels: Materials SCENE, JACS In C&EN, Nano SCENE, Analytical SCENE
Keywords: nuclear magnetic resonance, NMR, dynamic nuclear polarization, DNP, solid-state, siloxane, silanization

Silica surfaces functionalized with siloxanes are potentially useful in many applications—including biomedicine, coatings, and fuel cells—but they are challenging to characterize. Solid-state, two-dimensional 29Si-29Si NMR can reveal the chemical architecture but only after months of data collection. Adding dynamic nuclear polarization to enhance NMR signals enables those experiments to be completed in hours, reports a team led by Gaël De Paëpe of the French Alternative Energies & Atomic Energy Commission (J. . . .

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