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학위논문 동서

카르바졸 誘導體와 클로라닐의 電荷移動 錯物에 關한 硏究

문정대

부산: 동아대학교 대학원 1980

74 p: 삽도; 26 cm

학위논문(박사)-- 동아대학교 대학원: 물리화학전공, 1980. 2

영문초록 : The charge-transfer (CT) complexes between the molecules of electron donor and acceptor have been investigated by means of UV spectrophotometric method in the four species of solvents such as ethylene chloride, methylene chloride, chloroform and carbon tetrachloride Chloranil is used as the acceptor while the various derivatives of carbazole; i.e. 1,2,3,4-THC (tetrahydro carbazole), 2-methyl-THC, 3-mrithyl-THC and 3-ethyl-THC are employed as the donor molecules for this work. The absorption maxima of UV spectra for the donor molecules shift toward the short wavelength region in carbon tetrachloride exclusively, whereas those of spectra shift toward the long wavelength region in three polar solvents except carbon tetrachloride. The formation constants ( Kf ) and molar absorptrity ( ε_(λ) ) of these CT complexes are determined by Benesi-Hildebrand equation at various temperatures. The formation constant of the CT complexes are decreased with the increase of the solvent polaritv and the Kf values are also decreased with the increase of temperature. The increasing order of Kf and the steric effect is ovserbed as follows ; 3-ethyl-THC-chloranil 〉 3-methyl-THC-chloranil 〉 2-methyl-THC-chloranil 〉 1,2,3,4-THC-chloranil. The thermodynamic guanities such as △H°,△S° and △G° are obtained by using vant Hoff's equation. The values of Cf complexes ase dicussed in terms of the thermodynamic quantities.

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