Bulletin of the Korean Chemical Society

  • 제3권1호
  • /
  • Pages.13-18
  • /
  • 1982
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  • 0253-2964(pISSN)
  • /
  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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The New Substituent Constants in the Excited States

  • Shim Sang Chul (Department of Chemistry, Korea Advanced Institute of Science and Technology) ;
  • Park Joon Won (Lucky Central Research Institute) ;
  • Ham Hie Seok (Department of Chemistry, Chonnam National University)
  • 발행 : 1982.03.31
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초록

The new substituent constants $({\sigma}^{\ast})$ are calculated from the acidity constants $(pK^{\ast})$ of phenol derivatives in the excited state ($^1L_b$). These substituent constant are applied to the Hammett equations and found good correlation with $pK^{\ast}$ of 2,6-di-tert-butyl phenol, benzamide, nitroaniline, thiophenol, azobenzene, and benzoic acid derivatives. The correlation was much better than that of ground state substituent constants such as ${\sigma},\;{\sigma}^+$, and ${\sigma}^-$. From these results, the new substituent constants $({\sigma}^{\ast})$are proposed to be used for the linear free energy relationship in the $^1({\pi},{\pi}^{\ast})$ excited states of phenyl compounds.

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참고문헌

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피인용 문헌

  1. Substituent effects in the photohydration of styrenes and phenylacetylenes. An attempt to establish a ?h? scale for excited-state reactions vol.4, pp.4, 1982, https://doi.org/10.1002/poc.610040402
  2. Hammett Correlations of Electronic Absorption Spectral Parameters of Pyrimidines vol.102, pp.3, 1982, https://doi.org/10.1002/bscb.19931020307
  3. Successful application of the spin-delocalization substituent constant ?. to the correlation of the UV spectra of some model compounds withpara-Y-substituted phenyl groups vol.8, pp.12, 1982, https://doi.org/10.1002/poc.610081204
  4. Fluorescence quenching of para-substituted styrenes by tetramethylethylene. Correlation analysis of the quenching coefficient KSV and the quenching rate constant kq by the dual-parameter equation with vol.15, pp.5, 1997, https://doi.org/10.1002/cjoc.19970150503
  5. Structural Substituent Effect in the Excitation Energy of a Chromophore: Quantitative Determination and Application to S-Nitrosothiols vol.8, pp.9, 1982, https://doi.org/10.1021/ct300597u