Two new substituted calix[4]arene derivatives 2 and 3 were synthesized by the reaction of calix[4]arene with methyl o-bromomethyl-benzoate in the presence of potassium carbonate under nitrogen. Their compositions and structures were confirmed by elemental analysis, IR, 1H NMR and 13C NMR. Both the compounds are in the cone conformation. The percent extraction of the tetrasubstituted calix[4]arene derivative 2 for Li +, Na +, K + and Cs + are 6.8, 19.4, 69.8 and 7.1, respectively, indicating that derivative 2 extracts K + better than Li +, Na + and Cs +. The higher selective complexation of compound 2 with K + elucidated that the radius of potassium cation may be matched with the inclusion cavity formed by the carbonyl and phenoxy groups. There is only a little extractivity of disubstituted calix[4]arene derivative 3 for alkali metal ions.
A new three dimensional layered cobalt phosphate complex Co3(PO4)2·6H2O, was prepared by hydro-thermal reaction of Co(CH3COO)2·4H2O and H3PO4, NH4VO3. The crystal structure of the complex was deter-mined by single-crystal X-ray diffraction. The result indicates that it crystallizes in the tetragonal space group I4/m. It rarely occurs in cobalt phosphate complex to form two kinds of coordinate geometry of Co(Ⅱ), six water molecular oxygen atoms surround Co(Ⅱ) and form an octahedron geometry, Co(2) bond to four oxygen atoms from 4PO43- and one water molecular oxygen and build a tetragonal pyramid. The kinetic study shows that the first decomposition stage is governed by A B C mode. CSD: 414600.
