title: Paramagnet enhanced nuclear spin relaxation in H2O@Open-C60 and H2@Open-C60.
abstract: Relaxation rates of endo-H2O in H2O@Open-C60 in the presence of a nitroxide radical and of their nitroxide derivatives have been measured and are compared with effects for endo-H2 in similar cages. T1 relaxation enhancement of the endo-H2O and H2 induced by either intra- or intermolecular interaction is relatively insensitive to the presence of a cage opening. Enhancement of intermolecular relaxation is observed, however, when the cage opening has an OH group.
authors.affiliation: Department of Chemistry, Columbia University , New York, New York 10027, United States, Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States, and Institute for Chemical Research, Kyoto University , Kyoto 611-0011, Japan.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Li
authors.forename: Xuegong
authors.initials: X
authors.lastname: Lei
authors.forename: Judy Y C
authors.initials: JY
authors.lastname: Chen
authors.forename: Yasujiro
authors.initials: Y
authors.lastname: Murata
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Turro
authors.forename: Ronald G
authors.initials: RG
authors.lastname: Lawler