Electron spin resonance of difluorobiphenyls in the phosphorescent triplet states. s-cis and s-trans conformers and fluorine hyperfine structure

Katsumi Tanigaki, Mikio Yagi, Jiro Higuchi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Electron spin resonance spectra of 2,2′-, 3,3′-, and 4,4′-difluorobiphenyls (2DFBP, 3DFBP, and 4DFBP, respectively) in their phosphorescent triplet states have been studied in various matrices at 77 K. Two sets of peaks corresponding to the s-cis and s-trans conformers are observed for 2DFBP and 3DFBP. By using a stretched poly(vinyl alcohol) film as a host, the observed individual peaks are assigned. The 19F hyperfine splitting is obtained for 2DFBP and 4DFBP with a microwave magnetic field parallel to an external magnetic field (B ∥ Brf), which is different from the conventional resonance condition of B ⊥ Brf.

Original languageEnglish
Pages (from-to)282-295
Number of pages14
JournalJournal of Magnetic Resonance (1969)
Volume84
Issue number2
DOIs
Publication statusPublished - 1989 Sep
Externally publishedYes

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