The new uridine-containing derivative of p-tert-butylcalix [4] arene-5,11,17,23-tet-tert-butyl-25,26,27-trihydroxyl-28-oxyuridinecalix [4]arene (CU)-was synthesized and characterized by 1H NMR. 13C NMR, IR EI-MS. and ESI-MS spectra. By the ald of UV-vis spectra, the molecular recognition of CU was stuthed. The hyphromlc ef-fect in UV-vis spectra showed the obvious molecular recognition of CU to ATP. This recoenition is actually the hydro-gen bond interaction between the uracil group of CU and the base radical of ATP. The assocation constant between CU and adenine was determined b3 UV itration at low concentrations.

The acid-base properties of several new calix[4]arene derivatives were studied with chemometric methods by measurement of their UV absorbances under different pH. Resolving the acidbase fraction curves with chemometric methods, the pKa of these derivatives were determined and the fraction curves and pure absorbing spectra of each absorbing component in the calixarene system were obtained. The proton dissociation behavior of these derivatives was also discussed in this paper.

The catalysis effect of water-soluble calix[4] arene C[4] (calix[4] arene-5,11,17,23-tetrasulfonate) on hydrolysis of ATP in aqueous solution was studied by HPLC. Using laser photolysis and pulse radiolysis, the supramolecular interaction between water-soluble calix [4] arene and ATP was investigated.

The selective dinitro-substituted derivative of thiacalix [4] arene was synthesized by a three-step route and characterized. Its acid-base properties in a water solution were studied by UV-vis spectroscopy. Its four pKa values were determined by Target Testing Factor Analysis (TTFA).

The transport of Fe3+ ions with p-tert-butyl calix[n]arenes and their derivatives as carriers was studied by means of a bubbling pseudo-emulsion liquid membrane. The factors affecting the transport and the selective transport for Fe3+ ions from a mixture of Fe3+ and Cu2+ ions were investigated. It has been discovered that the gradient of the acidity between the source phase and the receiving phase is the driving force for the transport. Additionally, the transports using a series of calixarenes and their derivatives as carriers were studied and compared with each other. A preliminary discussion for the transport mechanism was also given in this paper.