Layered WO 3/4,4′-BPPOBp self assemble mulitlayers (SAMs) films have been fabricated by polyelectrolytes (PEs) approach. The SAMs films with well ordered superlattice structure and d space of 0.695nm and od photochromic property have been studied by employing UV visible, small angle XRD and XPS.

The gas phase elimination processes of 2-bromoacetic acid is theoretically studied by using ab initio MO method with basis set 3 21G,density functional method (B3LYP) with basis set lanl2dz, and the memi-empirical molecular orbital AM1 method. Although there are differences among the results calculated by using the three methods, such as the geometries of the transition states or intermediates, heights of energy barriers, the mechanism of the elimination reaction is yet found to be the same. The reaction studied is found to be a stepwise reaction, in which the first step, with a 5-membered ring transition state is the rate-determining one, which is in agreement with the mechanism, suggested by experimentalist.

1223 Hg-based Hg-Ba-Ca-Cu-(O,F) superconductor was prepared. It was proved that F entered 1223 superconductive phase and located at O(3) lattice site. The critical temperature T c of the samples doped with fluoride but without annealling is as high as 133.8 K, which is ～22 K higher than that of Hg Ba Ca Cu O standard samples. With the substitution of F with O, the carrier′s concentration in the superconductor is nearly close to the optimum value, which leads T c of F-doped samples increasing greatly.

 The formation and photodissociation of group Ⅳ(Si,Ge,Sn,Pb)/P binary cluster ions ,produced by laser ablation, were studied with a tandem TOF mass spectrometer. The stability of these cluster ions is influenced by their electronic and geometric structures ,and the geometric stability becomes more important for heavier group Ⅳ/P cluster ions. Two types of binary clusters marked with the magic numbers were observed: one type of magic clusters may be explained by the Wade's rule, in which P atom either attaches as electron-donating ligand to the closo-skeleton of group Ⅳatoms, or joins the closo-skeleton directly; another type of magic clusters are isoelectronic with magic species of neutral group Ⅳclusters or P clusters. The possible structures of magic cluster ions were studied by ab initio calculation and the Wade's rule.

 In this paper, the coplanar polypyrrole (PPY), poly(3-methyl) pyrrole(PMPY) and their stereo-partners with ring torsion angles 30°,60°,90°are calculated by using LCAO-SCF ab initio crystal method. The band structures of this system are discussed and analyzed. The charge distribution of the system are also discussed on the basis of Mülliken population analysis. Our results are well consistent with the experimental and other theoretical results.

 A novel series of polymeric surfactants were prepared by ultrasonic copolymerization of carboxy methyl cellulose (CMC) and alkyl poly(etheroxy) acrylate. The adsorption conformation of polymeric surfactants based on CMC at silica gel/water interface was studied by the adsorption isotherms, UV and XPS. The results show that the adsorptive amount es up steadily with the increasing of copolymer concentration, and the hydrophilic chains, CMC and poly(etheroxy) segments, adsorb to the surface of silica gel. After the critic micellar concentration of polymeric surfactants, the hemi-micelles are formed through the hydrophobic interaction between molecules adsorbed on the solid surface and those in solution.

The redox process of norepinephrine in pH=7.0 phosphate buffer solution at glassy carbon electrode was studied by circular dichroism spectroelectrochemistry with a long optical path thin layer cell. The spectroelectrochemical data were analyzed with the double logarithm method. According to the double logarithsmic plot results, the mechanism of electrochemical oxidation of norepinephrine is an irreversible process with a subsequent chemical reaction (EC) to form a norepinephrinechrome. Both of norepinephrinequinone and norepinephrinechrome are followed E mechanisms. Some kinetic parameters about the electrochemical process, i.e. the electron transfer coefficient and number of electron transfered, αn= 0.38, the formal potential, E 1 0' = 0.20 V, the standard heterogenous electron transfer rate constant, k 1 0=1.2×10 -4 cm•s -1 for the oxidation of norepinephrine, αn=0.37, E 2 0' =0.25 V and k 2 0 =4.4×10 -5 cm•s -1 for the reduction of norepinephrinequnone and αn=0.33, E 3 0' =-0.25V and k 3 0=1.1×10 -4 cm•s -1 for the reduction of norpinephrinechrome, were also estimated.

The nanostructured ZnO film electrodes were prepared. PPy and RuL 2(NCS) 2 could sensitize nanostructured ZnO film electrode. An initial PEC solar cell based on nanostructured ZnO/Dye/PPy (polypyrrole) film electrode was fabricated. A fill factor of 0.754 and a high overall light to electricity conversion efficiency of 1.3%for this type of solar cell were obtained. The sensitization mechanisms of the nanostructured ZnO electrodes were also discussed.

In this work, the compound 1,3-diphenyl-5-(1-pyrenyl)-2-pyrazoline (DPPP) has been synthesized. A bulky 5-aryl substituent in this compound makes the molecule non coplanar and having significant changes in photophysics. The investigation of its photophysical properties indicated that intermolecular charge transfer complex between DPPP molecule forms, easily even if the concentration is very low (1.08×10 -5 mol•L -1 ).Its fluorescence spectrum shows distinct solvent, concentration and temperature effects. Under different experimental conditions, the fluorescence may emit from pyrenyl monomer, intramolecular charge transfer complex (Intra-CT) and intermolecular charge transfer complex (Inter-CT).

 The novel bifunctional catalysts for mercaptan autoxidation have been prepared by supporting a mixture of cobalt phthalocyanine tetrasodium sulphonate CoPc(SO3Na) 4 (CPTS) and Cobalt phthalocyanine tetra(trimethylammonium) iodide CoPc[N(CH 3) 3I] 4 (CPTI) on mixed MgAl oxide ( Mg(A1)O ) derived from thermal decomposition of Mg Al hydrotalcite. The resulting catalysts were examined by the autoxidation reaction of 1-octanethiol. The catalyst shows an increase in reaction rate for the 1-octanethiol autoxidation as compared with an equal amount of catalyst containing CPTS or CPTI alone, and the highest activitiy and stability was achieved when the catalyst containing equimolar amount of CPTS and CPTI was used. This is the result of the matching of positive charge of CPTI and negative charge of CPTS, which prevents the aggregation of Co 2+ centers and the formation of less active peroxo complex: -Co(Ⅲ)-O-O-Co(Ⅲ) to a certain degree. The autoxidation reaction catalyzed by these bifunctional catalysts follows two substrate Michaelis Menten kinetics with respect to both of 1-octanethiol and oxygen and the apparent activation energy is 50.4 kJ•mol -1 .
 

 A new coated type of SnO 2/CdS nanosized composite particles was prepared by wet chemical method. The composition, structure and size of the product were determined by XRD, ICP, TEM and HRTEM. Compared with pure SnO 2 particle, it has stronger absorption in the range of longer wavelength (360～580nm) and shows od photo electrochemical character. The maximum value of IPCE was 40.9%, much greater than that of pure SnO2 electrode, 0.65%. The range photoelectric response has been broadened from 300～400nm to 300～550nm.

 The maximum solubilization of water, acetic buffer and salicin in H 2O/PC/Heptan Butanol reverse micelles were measured. The change of structure of β-1,4-glucosidase and salicin in this system was investigated by UV ,FT IR and NMR. The activity and kinetics of β-1,4-glucosidase in this system were also studied. The results indicated that β-1,4-glucosidase follows the Michaelis-Menten kinetics in this reverse micelles, the v max is 1.475mg•min -1 ,11.8 times larger than that in aqueous, the Km is 0.389mg•mL -1 only 1/25 of that in aqueous. The reasons which cause this phenomenon are that the interaction at the interface of the reverse micelles changes the structure of β-1,4-glucosidase ,increases the concentration of salicin ,and that the -N +(CH 3) 3 in PC′ polar head attacks the oxygen of the glycoside bond of salicin .

The reactivation and transformation of propane and iso-butane in the presence of oxygen on VM catalyst have been studied by temperature programmed reaction-FTIR. The results showed that breaking of the second C-H bond of C 3H 8 and the tertiary C-H bond of i-C4H10 may have been involved in the activation step, i.e. rate-limited step for propane and iso butane oxidative dehydrogenation. In propane oxidehydrogenation COx may either directly come from deep oxidation of propane, or come from consecutive oxidation of propene. While most of the cracking products ethene and methane are directly come from propane.The breaking of C-C bond in i-C4H10 is easier than that in C3H8.

The effect of polarization cooling in polypropylene has been studied. It is found that the polarization increases during quenching process. Further analysis by use of cyclic polarization TSC method where polarizing temperature changes from T p to T 0 then returns to T p shows that when T p is lower than the peak temperature, peak value increases and when T p is higher, the upper side of the peak extends. The polarization cooling strengthens the ability of polymer chains to bound the polarized charges.

The photoionization and photodissociation of bromoethane have been studied by using synchrotron radiation. The photoionization efficiency (PIE) curves of some fragments ions are measured. Based on these curves, the ionization potential of C2H5Br is determined to be 10.29eV,and the appearance potentials of C2H5 + ,CH2Br +are measured to be 10.60eV, 13.2eV respectively. We also have performed G2MP2 calculation on these fragments. According to experimental result and G2MP2 energy, the enthalpy of formation of ions C 2H 5 +,CH 2Br +,C 2H 5Br +,the bond energy of D 0(C 2H 5 +-Br),D 0(-Br),D 0(CH 2Br +-CH 3) have been evaluated. The most possible channels of the dissociation photoionization have been analyzed.

Polymeric surfactants were prepared by ultrasonic copolymerization of carboxy methyl cellulose (CMC) and alkyl poly(etheroxy) acrylate. The adsorption mechanism of CMC based polymeric surfactants at silica gel/water interface was studied by the adsorption isotherms, IR difference spectra. The results show that the adsorptive amount es up steadily with the increasing of copolymer concentration. Because of multicontact adsorption of copolymers at the surface of silica gel, the strong interaction between copolymers and surface of silica gel (such as hydrogen bond), large amount of polymeric surfactants adsorbs on silica gel. The pH value of copolymer solution plays a great role on adsorption, which indicates that the electrostatic action is the main adsorption mechanism of CMC based polymeric surfactants.

The isopiestic method was used to determinate isopiestic molality and osmotic coefficients in single salt solutions of LiCl-H2(molality range from 0.5 to 9.0 mol•kg -1 ), CaCl2-H2O(molality range from 0.35 to 5.2 mol•kg -1 ) and multisalt solution LiCl-CaCl2-H2O(ionic strength range from 0.5 to 15.7 mol•kg -1 ) at 298.15K, from which Pitzer's interaction parameters of single salt ,mixed salts of the systems were obtained. The mean ionic activity coefficients of LiCl、CaCl 2 in pure and mixed solutions were reported.