A pyrene-functional fluoroionophore, 1 was used to construct a supramolecular 1//-CD complex for Cu2+ recognition in water. In aqueous λ/-CD solution, 1 exhibits pyrene monomer fluorescence emission at 378 nm and 397nm, while in the presence of Cu2+, it shows a pyrene excimer emission at 452 nm with a decrease in the monomer fluorescence due to the formation of a 1: 2 metal-liganded complex. Based on the response characteristics of the supramolecular complex, a fluorescent ratiometric method was performed for the determination of Cu2+concentration in water. With the optimum conditions described, Cu2+ in aqueous solution can be determined from 1.2×10-6 to 4.5×10-4M. The Cu2+ selectivity of the complex is excellent, and the excimer fluorescence enhancements are very smaller induced by other heavy metal and transition metal ions.

The supramolecular interactions of b-cyclodextrin(b-CD) and four kinds of alkylated b-cyclodextrin (b-CDs), i.e. heptakis (2,6-di-O-isobutyl)-b-cyclodextrin (Ob-b-CD), heptakis (2,6-di-O-n-octyl)-b-cyclodextrin (Oc-b-CD), heptakis(2,6-di-O-n-dodecyl)-b-cyclodextrin (Od-b-CD) and heptakis (2,6-di-O-n-hexadecyl)-b-cyclodextrin (Oh-b-CD) with tetrakis(4-methoxylphenyl)porphyrin (TMOPP) have been investigated by Rayleigh light scattering (RLS) technique. b-CDs form 2:1 inclusion complex with TMOPP following an obvious RLS enhancement of TMOPP. The inclusion abilities of different b-CDs were compared. The results show that the inclusion ability of b-CDs is related to the size of the alkylated substituent. Thus, a new mechanism of inclusion interaction has been proposed. The exact stoichiometric ratios and the association constants of the inclusion complexes have been examined by application of curve fitting method.

A new capillary coating of alternate c-zirconium phosphate lysozyme fabricated for opentubular electrochromatography enantioseparation. The chiral compounds D, L-tryptophan tested were enantiomerically resolved. The influences brought by experimental parameters, such as organic modifier, temperature, applied voltage and pH of running buffer on the performance of the column, were investigated.

Based on the investigation of a non-ionic surfactant-salt-H2O liquid-liquid extraction system, general rules concerning salt selection are concluded and the mechanism of phase separation is explained. The extraction behavior of chlorpromazine hydrochloride (CPZ) and procaine hydrochloride (PCN) in such a system is studied. Research shows that the extraction efficiency of CPZ can amount to 96% by twice extraction, which means that quantitative extraction is realized, while that of PCN is 77%. This system produces distribution coefficients (KD) of 12.3 and 2.6, respectively, for CPZ and PCN. Extraction mechanism is deduced according to ultraviolet absorbance; and molecular fluorescence spectra change of the drugs in the system studied.

A chlorphenamine-imprinted polymer was prepared in this study. Chromatographic analysis showed that the retentivity and selectivity of the imprinted polymer were greatly strengthened through molecular imprinting. As a consequence, chlorphenamine could be easily separated from diphenhydramine. Ionic interaction was proved to be the main power for the imprinted polymer to bind chlorphenamine. The strong extraction ability of the imprinted polymer for chlorphenamine in aqueous solution was evaluated further. It was shown that chlorphenamine, as low as 0.02mol 1−1, could be concentrated by 50 times with a recovery of more than 90% at pH 5. This study gave the potential of using the imprinted polymer for solid-phase extraction of practical samples.