Two multiamide calix[4]arenes (5, 6) were synthesized and characterized by NMR, MS and elemental analysis. The binding properties of receptors with some anions (π-O2NPhOPO 3 2? , π-O2NPhO?, H2PO 4 ? , Ac?, Cl?, Br? and I?) were studied by UV-Vis spectra. The results indicate that the tetraamide calix[4]arenes (5, 6) have a good selectivity to the anions containing aromatic ring (π-O2NPhOPO3 2?, π-O2NPhO?). The 1 : 1 complexes between host and guest were formed through multiple hydrogen bonding and π-π interactions. The hosts 5 and 6 also show a definite binding ability for the anions (H2PO 4 ? , Ac?, Cl?) that have no ultraviolet absorption, which provides a simple method of spectrum detection for these anions.
LIU Shunying WANG Fajun WEI Lanhua XIAO Wang MENG Lingzhi HE Yongbing
Several new transition metal complexes using Schiff base containing pyridine and amide moieties (N, N'-bis(- salicylaliminoethyl)-2, 6-pyridinedicarboxylic amide, H4L) as the ligand have been prepared. Their compositions and structures are corroborated by elemental analysis, IR, UV, 1H NMR, DTA-TG and molar conductivity data. Their anti-bacterial activities have been studied by microcalorimetry. The result shows that the ligand and all com-plexes are potential anti-bacteria reagent and their inhibitory capacities are concentration-depended. The Mn com-plex has the strongest inhibitory capacity.
