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Intersystem Crossing Dynamics in the Iron(III) Spin-Crossover Compounds [Fe(acpa)2]PF6 and [Fe(Sal2tr)]PF6

Dyson, Raylene M.
Published in Inorganic chemistry. 1996, vol. 35, no. 16, p. 4676-4682
Abstract The high-spin → low-spin relaxation dynamics of the Fe(III) spin-crossover complexes [Fe(Sal2tr)]PF6 (H2Sal2tr = Bis(salicylaldimino)triethylenetetramine) and [Fe(acpa)2]PF6 (Hacpa = N-(1-acetyl-2-propylidene)-2-pyridylmethylamine) are discussed within the theory of nonadiabatic multiphonon relaxation. A Huang−Rhys factor S of ≈25, estimated on the basis of average metal−ligand bond length differences ΔrHL of ≈ 0.12 Å, explains the observed low-temperature tunneling rate constants kHL(T→0) of ≈ 102 s-1 as well as the thermally activated process at T > ≈100 K semiquantitatively. The results obtained for the Fe(III) compounds are compared to those for Fe(II) spin-crossover compound
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SCHENKER, Sabine, HAUSER, Andreas, DYSON, Raylene M. Intersystem Crossing Dynamics in the Iron(III) Spin-Crossover Compounds [Fe(acpa)2]PF6 and [Fe(Sal2tr)]PF6. In: Inorganic chemistry, 1996, vol. 35, n° 16, p. 4676-4682. doi: 10.1021/ic960010u https://archive-ouverte.unige.ch/unige:2974

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