Upper Rim Diester—bridged Calix[4] arenes and Oligocalix [4]—arenes：the Effects of the Length of Bridged Reagents on Their Distribution

A series of monobridged calix [4] arenes 3a-f,cyclic biscalix-[4] arenes 4a-f ,diametrically bridged at the upper rim with saturated aliphatic diester chians,have been synthesized,The results at diluted conditions show that the percentage of yields of mono-,bis- and oligo-calix[4] arenes are related to the legth of the chains ,With the shortening of the chains ,the percent-age of monocalix[4] arenes decreased ,All the calix [4] arene moieties are in a cone conformaiton according to the AB quar-tet pattern of the methylene protons between the phenolic rings in the ^1H NMR spectra.     

杯芳烃涂层毛细管的制备与电泳性能考察

通过化学键合的方法制备杯芳烃涂层毛细管,并用几种苯酚取代物对其电泳性能进行了考察。结果表明,该涂层管具有特殊的分离选择性,良好的稳定性和较高的检测灵敏度等特点。     

Upper Rim Diester-bridged Calixarenes and Oligocalix-arenes: the Effects of the Length of Bridged Reagents on Their Distribution

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