title: Nuclear spin isomers of guest molecules in H₂@C₆₀, H₂O@C₆₀ and other endofullerenes.
abstract: Spectroscopic studies of recently synthesized endofullerenes, in which H₂, H₂O and other atoms and small molecules are trapped in cages of carbon atoms, have shown that although the trapped molecules interact relatively weakly with the internal environment they are nevertheless susceptible to appropriately applied external perturbations. These properties have been exploited to isolate and study samples of H₂ in C₆₀ and other fullerenes that are highly enriched in the para spin isomer. Several strategies for spin-isomer enrichment, potential extensions to other endofullerenes and possible applications of these materials are discussed.
authors.affiliation: Department of Chemistry, Columbia University, New York, NY 10027, USA.
authors.forename: Judy Y-C
authors.initials: JY
authors.lastname: Chen
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Li
authors.forename: Michael
authors.initials: M
authors.lastname: Frunzi
authors.forename: Xuegong
authors.initials: X
authors.lastname: Lei
authors.forename: Yasujiro
authors.initials: Y
authors.lastname: Murata
authors.forename: Ronald G
authors.initials: RG
authors.lastname: Lawler
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Turro
keywords: endofullerenes; nuclear magnetic resonance; para-hydrogen; spin catalyst; spin isomers