title: Electron spin relaxation and heterogeneity of the 1:1 α,γ-bisdiphenylene-β-phenylallyl (BDPA)/benzene complex.
abstract: The electron spin-spin relaxation time (T(2)) for the 1:1 crystalline complex of α,γ-bisdiphenylene-β-phenylallyl (BDPA) with benzene was determined by continuous wave (CW) and rapid scan electron paramagnetic resonance (EPR). T(2) for individual BDPA particles found by simulation of rapid scan spectra or by simulation of the Lorentzian line shapes of CW spectra were in good agreement. The T(2) for small BDPA particles in air ranged from 80 to 160 ns, which corresponds to peak-to-peak Lorentzian linewidths of 0.82-0.41 G. The removal of oxygen from the samples had a greater impact on the line width for particles that had shorter T(2) in air. Heterogeneity in the g-value was not observed at X-band. Scanning electron microscope (SEM) images showed that the BDPA particles had varying morphology.
authors.affiliation: Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado 80208, United States.
authors.forename: Deborah G
authors.initials: DG
authors.lastname: Mitchell
authors.forename: Richard W
authors.initials: RW
authors.lastname: Quine
authors.forename: Mark
authors.initials: M
authors.lastname: Tseitlin
authors.forename: Ralph T
authors.initials: RT
authors.lastname: Weber
authors.forename: Virginia
authors.initials: V
authors.lastname: Meyer
authors.forename: Azure
authors.initials: A
authors.lastname: Avery
authors.forename: Sandra S
authors.initials: SS
authors.lastname: Eaton
authors.forename: Gareth R
authors.initials: GR
authors.lastname: Eaton
mesh_terms: D000498:Allyl Compounds / Q000737:chemistry*; D001554:Benzene / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D004583:Electrons; D010100:Oxygen / Q000737:chemistry
chemical_list: D000498:Allyl Compounds; C416323:bis-diphenylene-phenyl-allyl; D001554:Benzene; D010100:Oxygen