NOVEL ORGANIC IONS OF HIGH-SPIN STATES .6. ESR STUDY ON A MONOCATION OF A PROTOTYPICAL HIGH-SPIN MOLECULE WITH A WEAK INTRAMOLECULAR EXCHANGE INTERACTION, BIPHENYL-3,3'-DIYLBIS(PHENYLMETHYLENE)(+)

Authors
NAKAMURA T MOMOSE T SHIDA T KINOSHITA T TAKUI T TEKI Y ITOH K
Citation
T. Nakamura et al., NOVEL ORGANIC IONS OF HIGH-SPIN STATES .6. ESR STUDY ON A MONOCATION OF A PROTOTYPICAL HIGH-SPIN MOLECULE WITH A WEAK INTRAMOLECULAR EXCHANGE INTERACTION, BIPHENYL-3,3'-DIYLBIS(PHENYLMETHYLENE)(+), Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 306, 1997, pp. 439-446
Citations number
18
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
306
Year of publication
1997
Pages
439 - 446
Database
ISI
SICI code
1058-725X(1997)306:<439:NOIOHS>2.0.ZU;2-D
Abstract
A monocation of biphenyl-3,3'-diylbis(phenylmethylene) (BP-3,3'BPM) wa s produced by gamma-irradiation of biphenyl-3,3' diylbis(phenyldiazome thane) (BP-3,3'-BPD) followed by denitrogenation by a visible light ph otolysis. ESR spectra at 77 K indicated the formation of a spin-quarte t cation. However, the ground state of the cation was determined to be spin-doublet from the temperature dependence of the intensity of the quartet ESR signal. The doublet-quartet energy gap of the cation was e stimated to be about 24 cm(-1). The electronic state and the molecular structure of the cation were discussed by referring to a semiempirica l calculation and by comparing with those of the anion.