A novel category of salts based on diacetone acrylamide cation （DA^＋） and the anions such as acetate （Ac^-）, trifluoroacetate （TF^-）, tetrafluoroborate （BF^-）, hexafluorophosphate （PF^-）, sulfate （SO^-） and chloride （Cl^-） were synthesized by usual neutralization of acids and bases at room temperature and characterized by IR, ^1H NMR and elemental analysis （EA）. The results show that these compounds possess the characteristic of ionic liquids. In addition, four of them, DABF, DACl, DASO and DAPF, were efficient catalysts for esterication of acetic acid with C1-C6 alcohols and octanol.
Using new template agent, a new borophosphate compound, NH4Mn（H2O）2BP2O8·H2O was hydrothermally prepared and structurally characterized. It crystallizes in a hexagonal space group P6 1 22 with lattice parameters a= 0.9652（2） nm, c= 1.5792（5） nm, V= 1.2740（5） nm^3 and Z=6. The structure has a three-dimensional open-frame work with borophosphate helical ribbons ^1∞{ [BP2O8 ]^3-} and MnO4（H2O）2 octahedra. The water molecules are positioned inside the helical channels. Very interestingly, the ammonium ions are located outside the loop of the free helical ribbons via the strong hydrogen bonds, which is different from the borophosphate analogue reported. The magnetization of the title compound is paramagnetic down to 5 K of the Curie-Weiss type within the measured range of 5=-00 K with θ=-7.3 K, indicative of very weak antiferromagnetic interactions. The thermal decomposition of the compound was also described.
A new titanium-silicate material was synthesized with cubic cage-like tetramethylammonium octasilicate and TiCl4 ethanol solution as precursors. The product was characterized by FTIR, ^29Si NMR, UV-Vis, and XRD. Struc-tural and ingrediental analyses suggest that this material has a layered structure with cubic cage-like polyhedral oligo-silsesquioxane as building blocks and titanium as bridging atoms.
DING Han-ming ZHANG Da-wei LI Jiang KONG Ai-guo SHAN Yong-kui
