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利用荧光光谱分析法,考察了2-羟基-1-萘甲醛半碳酰腙(L)作为受体分子与F~-、Cl~-、Br~-、I~-、SO_3~(2-)、NO_3~-、ClO_4~-、H_2PO_4~-、SO_4~(2-)、CH_3COO~-、CO_3~(2-)等阴离子的作用。研究结果表明,在乙腈溶液中该受体分子其酚羟基OH与—C=N—基N之间的分子内氢键强度较弱,引入CH_3COO-和CO_3~(2-)增强了分子内氢键强度,在波长495nm处出现激发态分子内质子转移(ESIPT)荧光,荧光滴定实验表明该受体分子与CH_3COO~-和CO_3~(2-)均形成1:1型结合物,提出了可能的配合物结合模式。
Fluorescence spectroscopy was used to investigate the effects of 2-hydroxy-1-naphthaldehyde semicarbazone (L) as acceptor molecule on the interaction of F ~ -, Cl ~ -, Br ~ , NO_3 ~ -, ClO_4 ~ -, H_2PO_4 ~ -, SO_4 ~ (2 -), CH_3COO ~ -, CO_3 ~ (2-) and other anions. The results show that the intramolecular hydrogen bond between the phenolic hydroxyl group OH and -C = N-group N is weak in the acetonitrile solution, the introduction of CH 3 COO- and CO 3 2- enhances the intramolecular hydrogen The intensity of the intramolecular proton transfer (ESIPT) fluorescence at 495 nm was observed. Fluorescence titration experiments showed that this receptor molecule formed a 1: 1 type conjugate with CH_3COO ~ - and CO_3 ~ (2-) The complex binding mode.