Time-resolved electron paramagnetic resonance and phosphorescence studies of the lowest excited triplet states of Rh(III) corrole complexes

Mana Tanabe; Hideto Matsuoka; Yasunori Ohba; Seigo Yamauchi; Kenji Sugisaki; Kazuo Toyota; Kazunobu Sato; Takeji Takui; Israel Goldberg; Irena Saltsman; Zeev Gross

doi:10.1021/jp3071037

Time-resolved electron paramagnetic resonance and phosphorescence studies of the lowest excited triplet states of Rh(III) corrole complexes

Mana Tanabe, Hideto Matsuoka, Yasunori Ohba, Seigo Yamauchi^*, Kenji Sugisaki, Kazuo Toyota, Kazunobu Sato, Takeji Takui, Israel Goldberg, Irena Saltsman, Zeev Gross

^*Corresponding author for this work

School of Chemistry

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Abstract

The lowest excited triplet (T ₁) ππ* states of gallium (Ga) and various rhodium (Rh) 5,10,15-trispentafluorophenyl corroles (Cors) were studied in the liquid crystal (LC) E-7 and in rigid glasses by time-resolved electron paramagnetic resonance (TR-EPR) spectroscopy. The triplet sublevel energies were experimentally determined by the alignment of the molecules in the LC and by magnetophotoselection in the glass. The sublevel scheme of GaCor was determined by calculating the zero field splitting (ZFS) parameters. Axial ligand effects and quantum chemical calculations were used for the sublevel assignment of RhCors. The anisotropic EPR parameters were used to determine the important higher excited states and the magnitudes of their spin-orbit coupling (SOC) contributions were evaluated. On the basis of these results and analyses, the EPR parameters and triplet lifetime were discussed for each RhCor complex.

Original language	English
Pages (from-to)	9662-9673
Number of pages	12
Journal	Journal of Physical Chemistry A
Volume	116
Issue number	39
DOIs	https://doi.org/10.1021/jp3071037
State	Published - 4 Oct 2012

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Tanabe, M., Matsuoka, H., Ohba, Y., Yamauchi, S., Sugisaki, K., Toyota, K., Sato, K., Takui, T., Goldberg, I., Saltsman, I., & Gross, Z. (2012). Time-resolved electron paramagnetic resonance and phosphorescence studies of the lowest excited triplet states of Rh(III) corrole complexes. Journal of Physical Chemistry A, 116(39), 9662-9673. https://doi.org/10.1021/jp3071037

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title = "Time-resolved electron paramagnetic resonance and phosphorescence studies of the lowest excited triplet states of Rh(III) corrole complexes",

abstract = "The lowest excited triplet (T 1) ππ* states of gallium (Ga) and various rhodium (Rh) 5,10,15-trispentafluorophenyl corroles (Cors) were studied in the liquid crystal (LC) E-7 and in rigid glasses by time-resolved electron paramagnetic resonance (TR-EPR) spectroscopy. The triplet sublevel energies were experimentally determined by the alignment of the molecules in the LC and by magnetophotoselection in the glass. The sublevel scheme of GaCor was determined by calculating the zero field splitting (ZFS) parameters. Axial ligand effects and quantum chemical calculations were used for the sublevel assignment of RhCors. The anisotropic EPR parameters were used to determine the important higher excited states and the magnitudes of their spin-orbit coupling (SOC) contributions were evaluated. On the basis of these results and analyses, the EPR parameters and triplet lifetime were discussed for each RhCor complex.",

author = "Mana Tanabe and Hideto Matsuoka and Yasunori Ohba and Seigo Yamauchi and Kenji Sugisaki and Kazuo Toyota and Kazunobu Sato and Takeji Takui and Israel Goldberg and Irena Saltsman and Zeev Gross",

year = "2012",

month = oct,

day = "4",

doi = "10.1021/jp3071037",

language = "אנגלית",

volume = "116",

pages = "9662--9673",

journal = "Journal of Physical Chemistry A",

issn = "1089-5639",

publisher = "American Chemical Society",

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Tanabe, M, Matsuoka, H, Ohba, Y, Yamauchi, S, Sugisaki, K, Toyota, K, Sato, K, Takui, T, Goldberg, I, Saltsman, I & Gross, Z 2012, 'Time-resolved electron paramagnetic resonance and phosphorescence studies of the lowest excited triplet states of Rh(III) corrole complexes', Journal of Physical Chemistry A, vol. 116, no. 39, pp. 9662-9673. https://doi.org/10.1021/jp3071037

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T1 - Time-resolved electron paramagnetic resonance and phosphorescence studies of the lowest excited triplet states of Rh(III) corrole complexes

AU - Tanabe, Mana

AU - Matsuoka, Hideto

AU - Ohba, Yasunori

AU - Yamauchi, Seigo

AU - Sugisaki, Kenji

AU - Toyota, Kazuo

AU - Sato, Kazunobu

AU - Takui, Takeji

AU - Goldberg, Israel

AU - Saltsman, Irena

AU - Gross, Zeev

PY - 2012/10/4

Y1 - 2012/10/4

N2 - The lowest excited triplet (T 1) ππ* states of gallium (Ga) and various rhodium (Rh) 5,10,15-trispentafluorophenyl corroles (Cors) were studied in the liquid crystal (LC) E-7 and in rigid glasses by time-resolved electron paramagnetic resonance (TR-EPR) spectroscopy. The triplet sublevel energies were experimentally determined by the alignment of the molecules in the LC and by magnetophotoselection in the glass. The sublevel scheme of GaCor was determined by calculating the zero field splitting (ZFS) parameters. Axial ligand effects and quantum chemical calculations were used for the sublevel assignment of RhCors. The anisotropic EPR parameters were used to determine the important higher excited states and the magnitudes of their spin-orbit coupling (SOC) contributions were evaluated. On the basis of these results and analyses, the EPR parameters and triplet lifetime were discussed for each RhCor complex.

AB - The lowest excited triplet (T 1) ππ* states of gallium (Ga) and various rhodium (Rh) 5,10,15-trispentafluorophenyl corroles (Cors) were studied in the liquid crystal (LC) E-7 and in rigid glasses by time-resolved electron paramagnetic resonance (TR-EPR) spectroscopy. The triplet sublevel energies were experimentally determined by the alignment of the molecules in the LC and by magnetophotoselection in the glass. The sublevel scheme of GaCor was determined by calculating the zero field splitting (ZFS) parameters. Axial ligand effects and quantum chemical calculations were used for the sublevel assignment of RhCors. The anisotropic EPR parameters were used to determine the important higher excited states and the magnitudes of their spin-orbit coupling (SOC) contributions were evaluated. On the basis of these results and analyses, the EPR parameters and triplet lifetime were discussed for each RhCor complex.

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Time-resolved electron paramagnetic resonance and phosphorescence studies of the lowest excited triplet states of Rh(III) corrole complexes

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