Abstract: The general formula of methine disperse dyes of benzthiophen-one derivatives is where R1 and R2 may be the same or different non-ionic hydrophobic groups such as H, Me, CH2CN, CH2OH, CH2Cl, C6H5, (CH2)4CH3 etc, X represents H, Me etc; and Z represents O or C(Y)Y, where Y and Y may be the same or different polar groups such as CN, COOC2H5 etc. The absorption spectra of dyes are different for different substituents X, Z, R1 and R2. The polarities of R1 and R2 are represented by η, which are related to the pKa values corresponding to the substituents R1 and R2. The empiric equations of the relationship of the absorption spectra of dyes with η were obtained in acetone. The effect of substituent X, Z on absorption spectrum were studied. Otherwise the relation of the absorption spectrum of dyes with η are similar in other four different solvents.

摘要： 本文测定了一系列苯骈噻吩酮衍生物甲川型分散染料在溶液中的吸收光谱,研究了这类染料的分子结构与吸收光谱之间的关系.