title: Magnetic excitations in metalloporphyrins by inelastic neutron scattering: determination of zero-field splittings in iron, manganese, and chromium complexes.
abstract: Zero field splitting (ZFS) parameters of several nondeuterated metalloporphyrins [M(TPP)Cl] and [Mn(TPP)] (H2TPP = tetraphenylporphyrin) have been directly determined by inelastic neutron scattering (INS). The ZFS values are the following: D = 6.33(8) cm(-1) for [Fe(TPP)Cl], -2.24(3) cm(-1) for [Mn(TPP)Cl], 0.79(2) cm(-1) for [Mn(TPP)], and |D|= 0.234(12) cm(-1) for [Cr(TPP)Cl]. The work shows that compounds with magnetic excitations below ∼30 cm(-1) could be determined using nondeuterated samples.
authors: Department of Chemistry, The University of Tennessee , 1420 Circle Drive, Knoxville, Tennessee 37996, United States.
authors: Seth C
authors: SC
authors: Hunter
authors: Andrey A
authors: AA
authors: Podlesnyak
authors: Zi-Ling
authors: ZL
authors: Xue
mesh_terms: D002857:Chromium / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D060328:Magnetic Phenomena; D008345:Manganese / Q000737:chemistry*; D008665:Metalloporphyrins / Q000737:chemistry*; D015394:Molecular Structure; D009502:Neutrons
chemical_list: D056831:Coordination Complexes; D008665:Metalloporphyrins; D002857:Chromium; D008345:Manganese; D007501:Iron