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本文报道几种双—β—萘甲酸多次甲基二醇酯及双—β—萘基烷烃次甲基链上被极性基团取代的衍生物的合成及其荧光谱。结果表明,它们都能形成分子内激基缔合物,对于双—β—萘甲酸多次甲基二醇酯来说,其分子内激基缔合物的荧光强度与链长有关,以三次甲基链为最大。对于双—β—萘基烷烃取代衍生物来说,由于吸电子基团的引入使两个萘环的电子云密度不等,它们所形成的分子内激基缔合物的荧光峰都比未取代的1,3—双—β—萘基丙烷有所蓝移。在极性溶剂乙腈中其分子内激基缔合物的荧光峰的位置虽然不变,但I_E/I_2值则有所降低,表现出既不完全与激基缔合物相同,又不完全与激基复合物相同的性质。
In this paper, the synthesis and fluorescence spectra of several bis-β-naphthoic acid methyldiallesters and derivatives substituted by polar groups in the bis-β-naphthyl alkane methine chain have been reported. The results showed that both of them can form intramolecular excimer, the fluorescence intensities of intramolecular excimer in the case of bis-beta-naphthoic acid polymethylene glycol ester are related to the length of the chain, Methyl chain is the largest. In the case of bis-β-naphthylalkyl substituted derivatives, due to the introduction of electron-withdrawing groups, the electron cloud densities of the two naphthalene rings are different, and the fluorescence peak of the intramolecular excimer formed by them is lower than that of the Substituted 1,3-bis-β-naphthylpropane blue shift. Although the position of the fluorescence peak of the intramolecular excimer in the polar solvent acetonitrile remains unchanged, the value of I_E / I_2 is decreased, showing the same as the excipient but not completely The same properties of exciplexes.