Magnetic Excitations in Metalloporphyrins by Inelastic Neutron Scattering: Determination of Zero-Field Splittings in Iron, Manganese, and Chromium Complexes

Magnetic Excitations in Metalloporphyrins by Inelastic Neutron Scattering: Determination of Zero-Field Splittings in Iron, Manganese, and Chromium Complexes

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)...

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Veröffentlicht in:Inorganic chemistry 2014-02, Vol.53 (4), p.1955-1961
Hauptverfasser: Hunter, Seth C, Podlesnyak, Andrey A, Xue, Zi-Ling
Format: Artikel
Sprache:eng
Schlagworte:
Chromium - chemistry
Coordination Complexes - chemistry
Iron - chemistry
Magnetic Phenomena
Manganese - chemistry
Metalloporphyrins - chemistry
Molecular Structure
Neutrons
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Zusammenfassung: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.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic4028354