Recognition of linear dicarboxylate anions by the host with two naphthv lurea groups

来源 :Progress in Natural Science | 被引量 : 0次 | 上传用户:pkpm1
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The compound 1 with preorganized structure was synthesized, and its absorption and fluorescence spectra in the presence of dicarboxylate anion were studied. The results showed that the emission of compound 1 at 380 nm could be quenched via addition of dicarboxylate anion, and a structureless red-shift emission band at 500 nm appeared simultaneously. These phenomena could be caused by the formation of the complex of compound 1 and dicarboxylate anion. According to the results of fluorescence spectra and ’H-NMR, the binding constant of pimelate with compound 1 has the largest value, owing to the most suitable conformation of compound 1 for pimelate. The compound 1 with preorganized structure was synthesized, and its absorption and fluorescence spectra were the presence of dicarboxylate anion were studied. The results showed that the emission of compound 1 at 380 nm could be quenched via addition of dicarboxylate anion, and a structureless red- These phenomena could be caused by the formation of the complex of compound 1 and dicarboxylate anion. According to the results of fluorescence spectra and ’H-NMR, the binding constant of pimelate with compound 1 has the largest value, owing to the most suitable conformation of compound 1 for pimelate.
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