title: N@C60-porphyrin: a dyad of two radical centers.
abstract: Dyads of endohedral nitrogen fullerene and porphyrin have been synthesized. In the two-radical-center dyad, the copper(II) tetraphenylporphyrin suppressed the electron spin resonance (ESR) signal of N@C(60) through intramolecular dipolar coupling with a strength of 27.0 MHz. Demetalation of the metalloporphyrin moiety of the dyad, which effectively turned the two-radical-center dyad into a single-radical-center dyad, recovered 82% of the ESR signal of N@C(60). Such mechanism of switching a spin state on and off could find use in molecular spintronics applications.
authors.affiliation: Department of Materials, Oxford University, Oxford OX1 3PH, United Kingdom.
authors.forename: Guoquan
authors.initials: G
authors.lastname: Liu
authors.forename: Andrei N
authors.initials: AN
authors.lastname: Khlobystov
authors.forename: Georgios
authors.initials: G
authors.lastname: Charalambidis
authors.forename: Athanassios G
authors.initials: AG
authors.lastname: Coutsolelos
authors.forename: G Andrew D
authors.initials: GA
authors.lastname: Briggs
authors.forename: Kyriakos
authors.initials: K
authors.lastname: Porfyrakis
mesh_terms: D003300:Copper / Q000737:chemistry*; D005609:Free Radicals / Q000138:chemical synthesis / Q000737:chemistry; D037741:Fullerenes / Q000737:chemistry*; D008665:Metalloporphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*
chemical_list: D005609:Free Radicals; D037741:Fullerenes; D008665:Metalloporphyrins; D011166:Porphyrins; D003300:Copper; D009584:Nitrogen; C069837:fullerene C60