Nuclear spin conversion of water inside fullerene cages detected by low-temperature nuclear magnetic resonance.
作者： Salvatore Mamone , Maria Concistrè , Elisa Carignani , Benno Meier , Andrea Krachmalnicoff
DOI: 10.1063/1.4873343
关键词:
摘要: The water-endofullerene H2O@C60 provides a unique chemical system in which freely rotating water molecules are confined inside homogeneous and symmetrical carbon cages. spin conversion between the ortho para species of endohedral H2O was studied solid phase by low-temperature nuclear magnetic resonance. experimental data consistent with second-order kinetics, indicating bimolecular process. Numerical simulations suggest simultaneous presence diffusion process allowing neighbouring to exchange their angular momenta. Cross-polarization experiments found no evidence that is catalysed 13C nuclei present
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