title: Alignment of N@C60 derivatives in a liquid crystal matrix.
abstract: The orientation of different N-substituted [N@C60]fulleropyrrolidine derivatives hosted in a nematic liquid crystal matrix has been studied by electron spin resonance spectroscopy. In this study, variations on the zero field splitting parameter of the guest species are employed as a means of determining their degree of orientation. Fulleropyrrolidines with more rigid N-substituents are preferentially oriented in the liquid crystal matrix, whereas those with less rigid substituents are almost randomly distributed. Additionally, the orientation of a C60 fullerene cage bearing a nitroxide radical has also been investigated in comparison.
authors.affiliation: Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom.
authors.forename: Guoquan
authors.initials: G
authors.lastname: Liu
authors.forename: Maria del Carmen
authors.initials: Mdel C
authors.lastname: Gimenez-Lopez
authors.forename: Martyn
authors.initials: M
authors.lastname: Jevric
authors.forename: Andrei N
authors.initials: AN
authors.lastname: Khlobystov
authors.forename: G Andrew D
authors.initials: GA
authors.lastname: Briggs
authors.forename: Kyriakos
authors.initials: K
authors.lastname: Porfyrakis
mesh_terms: D003497:Cyclic N-Oxides / Q000737:chemistry; D004058:Diffusion; D037741:Fullerenes / Q000737:chemistry*; D050866:Liquid Crystals / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D009584:Nitrogen / Q000737:chemistry*
chemical_list: D003497:Cyclic N-Oxides; D037741:Fullerenes; D009584:Nitrogen; C069837:fullerene C60; C003959:TEMPO