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

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

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 languageEnglish
Pages (from-to)9662-9673
Number of pages12
JournalJournal of Physical Chemistry A
Volume116
Issue number39
DOIs
Publication statusPublished - 2012 Oct 4

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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