title: Deconvolution of sinusoidal rapid EPR scans.
abstract: In rapid scan EPR the magnetic field is scanned through the signal in a time that is short relative to electron spin relaxation times. Previously it was shown that the slow-scan lineshape could be recovered from triangular rapid scans by Fourier deconvolution. In this paper a general Fourier deconvolution method is described and demonstrated to recover the slow-scan lineshape from sinusoidal rapid scans. Since an analytical expression for the Fourier transform of the driving function for a sinusoidal scan was not readily apparent, a numerical method was developed to do the deconvolution. The slow scan EPR lineshapes recovered from rapid triangular and sinusoidal scans are in excellent agreement for lithium phthalocyanine, a trityl radical, and the nitroxyl radical, tempone. The availability of a method to deconvolute sinusoidal rapid scans makes it possible to scan faster than is feasible for triangular scans because of hardware limitations on triangular scans.
authors.affiliation: Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80208, USA.
authors.forename: Mark
authors.initials: M
authors.lastname: Tseitlin
authors.forename: George A
authors.initials: GA
authors.lastname: Rinard
authors.forename: Richard W
authors.initials: RW
authors.lastname: Quine
authors.forename: Sandra S
authors.initials: SS
authors.lastname: Eaton
authors.forename: Gareth R
authors.initials: GR
authors.lastname: Eaton
mesh_terms: D000465:Algorithms; D003627:Data Interpretation, Statistical; D004574:Electromagnetic Fields; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D005583:Fourier Analysis; D007211:Indoles / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry; D014216:Triacetoneamine-N-Oxyl; D014320:Triphenylmethyl Compounds
chemical_list: D007211:Indoles; D009942:Organometallic Compounds; D014320:Triphenylmethyl Compounds; C081756:lithium phthalocyanine; D014216:Triacetoneamine-N-Oxyl