Temperature-dependent magnetic circular dichroism of lutetium bisphthalocyanine

Cara L. Dunford; Bryce E. Williamson; Elmars Krausz

doi:10.1021/jp993497b

Temperature-dependent magnetic circular dichroism of lutetium bisphthalocyanine

Cara L. Dunford^*, Bryce E. Williamson, Elmars Krausz

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

Magnetic circular dichroism (MCD) and absorption spectra are reported for the Q, RV, and IV band regions (6000-19000 cm^-1) of lutetium bisphthalocyanine in poly(methyl methacrylate) films and Ar matrixes. Weak, temperature-independent MCD of the IV band (∼7500 cm^-1) is consistent with its assignment to the intervalence transition of a delocalized mixed-valence system. The temperature-dependent MCD of the Q (∼15300 cm^-1) and RV (∼11000 cm^-1) bands is quantified by moment analysis and interpreted to indicate excited-state spin-orbit splittings due to weak mixing of metal and ligand π Orbitals. The spectra are semiquantitatively consistent with interpretation of these bands as arising from fully allowed transitions terminating in exciton coupling states derived principally from π* ← π excitations of the individual ligands.

Original language	English
Pages (from-to)	3537-3543
Number of pages	7
Journal	Journal of Physical Chemistry A
Volume	104
Issue number	16
DOIs	https://doi.org/10.1021/jp993497b
Publication status	Published - 27 Apr 2000

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title = "Temperature-dependent magnetic circular dichroism of lutetium bisphthalocyanine",

abstract = "Magnetic circular dichroism (MCD) and absorption spectra are reported for the Q, RV, and IV band regions (6000-19000 cm-1) of lutetium bisphthalocyanine in poly(methyl methacrylate) films and Ar matrixes. Weak, temperature-independent MCD of the IV band (∼7500 cm-1) is consistent with its assignment to the intervalence transition of a delocalized mixed-valence system. The temperature-dependent MCD of the Q (∼15300 cm-1) and RV (∼11000 cm-1) bands is quantified by moment analysis and interpreted to indicate excited-state spin-orbit splittings due to weak mixing of metal and ligand π Orbitals. The spectra are semiquantitatively consistent with interpretation of these bands as arising from fully allowed transitions terminating in exciton coupling states derived principally from π* ← π excitations of the individual ligands.",

author = "Dunford, {Cara L.} and Williamson, {Bryce E.} and Elmars Krausz",

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language = "English",

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T1 - Temperature-dependent magnetic circular dichroism of lutetium bisphthalocyanine

AU - Dunford, Cara L.

AU - Williamson, Bryce E.

AU - Krausz, Elmars

PY - 2000/4/27

Y1 - 2000/4/27

N2 - Magnetic circular dichroism (MCD) and absorption spectra are reported for the Q, RV, and IV band regions (6000-19000 cm-1) of lutetium bisphthalocyanine in poly(methyl methacrylate) films and Ar matrixes. Weak, temperature-independent MCD of the IV band (∼7500 cm-1) is consistent with its assignment to the intervalence transition of a delocalized mixed-valence system. The temperature-dependent MCD of the Q (∼15300 cm-1) and RV (∼11000 cm-1) bands is quantified by moment analysis and interpreted to indicate excited-state spin-orbit splittings due to weak mixing of metal and ligand π Orbitals. The spectra are semiquantitatively consistent with interpretation of these bands as arising from fully allowed transitions terminating in exciton coupling states derived principally from π* ← π excitations of the individual ligands.

AB - Magnetic circular dichroism (MCD) and absorption spectra are reported for the Q, RV, and IV band regions (6000-19000 cm-1) of lutetium bisphthalocyanine in poly(methyl methacrylate) films and Ar matrixes. Weak, temperature-independent MCD of the IV band (∼7500 cm-1) is consistent with its assignment to the intervalence transition of a delocalized mixed-valence system. The temperature-dependent MCD of the Q (∼15300 cm-1) and RV (∼11000 cm-1) bands is quantified by moment analysis and interpreted to indicate excited-state spin-orbit splittings due to weak mixing of metal and ligand π Orbitals. The spectra are semiquantitatively consistent with interpretation of these bands as arising from fully allowed transitions terminating in exciton coupling states derived principally from π* ← π excitations of the individual ligands.

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DO - 10.1021/jp993497b

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JF - Journal of Physical Chemistry A

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Temperature-dependent magnetic circular dichroism of lutetium bisphthalocyanine

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