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本文报道了一系列钠盐在调控聚1,2-丙二醇(PPG)与β-环糊精(β-CD)超分子组装过程中的重要作用。首先,几个从钠盐溶液中沉淀出来的组装体在PPG与β-CD的化学计量比上存在着差异,对于NaCl和Na2CO3得到的是PPG-(β-CD)7,对于NaAsO2得到的是PPG-(β-CD)8,此结果与从水中得到的产物PPG-(β-CD)5以及从锂盐溶液得到的产物PPG-(β-CD)6完全不同;其次,基于3个独立的实验(包括黏度、表面张力、摩尔电导率)所得结果的比较可以部分地解释产物组成上的差别;最后,场发射扫描电子显微镜、热重分析表征结果表明:产物即使具有相同的组成,它们的表面结构和物理性质也相当不同,这说明了盐效应在设计、构建超分子聚集体中的重要性和复杂性。
This paper reports the important role of a series of sodium salts in the regulation of supramolecular assembly of poly (1,2-propylene glycol) and β-cyclodextrin (β-CD). First, there are several differences in the stoichiometry of PPG and β-CD for several precipitates from sodium salt solutions. PPG- (β-CD) 7 is obtained for NaCl and Na2CO3. For NaAsO2, PPG- (β-CD) 8, which is completely different from the product PPG- (β-CD) 5 obtained from water and the product PPG- (β-CD) 6 from lithium salt solution. (Including viscosity, surface tension and molar conductivity). The results of field emission scanning electron microscopy and thermogravimetric analysis show that the products have the same composition Surface structure and physical properties are quite different, indicating the salt effect in the design and construction of supramolecular aggregates in the importance and complexity.