Intrinsic enhancement factors of the spin-orbit coupling mechanism polarization in the duroquinone-N,N-dimethylaniline derivative systems

Shinya Sasaki, Yasuhiro Kobori, Kimio Akiyama, Shozo Tero-Kubota

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Dynamics of the electron spin polarization of the quinone anion radical generated from the photoinduced electron transfer between duroquinone (DQ) and N,N-dimethylaniline (DMA) as well as its p-halogen substituents (4XDMA) has been investigated by using transient absorption and FTEPR spectroscopies. The radical yield decreased with increasing atomic number of the halogen in the donor. The intrinsic enhancement factors of net absorptive polarization due to the spin-orbit coupling mechanism (SOCM) of VSOCM = 2, 17, and 25 were determined in the unit of thermal equilibrium polarization at room temperature for the DQ-4C1DMA, DQ-4BrDMA, and DQ-4IDMA systems, respectively. The net absorptive spin polarization observed has been discussed in terms of SOC interaction of the triplet contact radical ion pair (CRIP) state with the ground state, which is coupled with the singlet CRIP states in the solvent coordinate.

Original languageEnglish
Pages (from-to)8078-8083
Number of pages6
JournalJournal of Physical Chemistry A
Volume102
Issue number42
Publication statusPublished - 1998 Oct 15

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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