Multidimensional Symmetry in a Three-Dimensional World

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Science  16 Nov 2001:
Vol. 294, Issue 5546, pp. 1475-1476
DOI: 10.1126/science.1066542

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Nuclear magnetic resonance carries information not only about intermolecular but also about intramolecular structure. The latter interactions have historically been viewed mostly as a nuisance to be eliminated, but this perspective is changing. In his Perspective, Warren highlights the report by Baugh et al., who have observed large intermolecular dipolar interactions for hydrogen molecules in nanometer-scale voids in amorphous silicon. The results show that dipolar effects, far from being a nuisance, can provide a valuable probe of nanometer-scale structure.