ESR 분광법에 의한 Anthraquinone 치환체의 음이온 라디칼에 대한 초미세 분리상수의 측정과 이론적 해석

  • 홍대일 (계명대학교 자연과학대학 화학과) ;
  • 김경찬 (계명대학교 물리학과) ;
  • 김창진 (대구대학교 자연과학대학 화학과) ;
  • 이갑룡 (효성여자대학교 사범대학 화학교육과)
  • Published : 19940100

Abstract

Substituted anthrasemiquinone radical anions, which were formed by laser flash photoreduction of the substituted anthraquinone (1,4-DHAQ, 1,5-DHAQ, 1,8-DHAQ, 1,8-DCAQ), were studied by the electron spin resonance spectroscopy in the mixed solvents of the 2-propanol and the triethylamine. Hyperfine splitting constants (hfsc) were determined by simulating the ESR spectra. Extended Huckel Molecular Orbital (EHMO) calculations were performed to obtain $\pi$ spin densities for these quinones. The hyperfine splitting constants could be assigned to specific protons on the basis of $\pi$ spin densities.

Keywords

References

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