The photodissociation of cis-(NO)2 in N2 and Ar matrices under 266 nm pulsed laser irradiation is reported. Results show the electronically excited O(1D) atom may be formed in the primary photolysis step. In the N2 matrix, the highly active O(1D) atoms could either react with N2 lattice molecules forming N2O or recombine with nearby N2O forming cis-(NO)2 and trans-(NO)2. However, in the Ar matrix the nascent state O(1D) atom, due to the lack of reactant, quenches to O(3P) as moving through the lattice site and the yield of N2O is less than that in N2 matrix.

The fluorescence behavior of coumarin excimer formed form the excited α, ω-biscoumarin long chain compounds in different conditions has been investigated in this paper. The fluorescence spectra show its emission maximum wave-length at 450nm in aqueous solution, and the single photon counting technique indicates its lifetime around 5.0ns. The 1H NMR spectra demonstrate the reason of the excimer formation to be the hydrophobic interaction which enhances the intramolecular aggregation of coumarin located at the terminal of molecule.

 Results of ab initio SCF calculations for 1,2-diseleno-3,4-dithiosquaric acid are reported. The ZZ isomer is predicted to be the most stable among the three planar isomers studied. Vibrational frequencies have also been calculated for the three isomers.

The results of positron annihilation studies on the side－chain polymer liquid crystals were obtained as a function of temperature． It is indicated that thermotropic liquid crystal has two phase transition points near 40℃ and 76℃ respectively． It is suggested that the first phase transition point is correspondent to the melting point of specimen and the second one is clearing point at which liquid crystal phase transits isotropic liquid phase． It can be concluded by the changes of Free－Volume at the phase transition points that the smectic state SA is in better ordered state than the other liquid crystals. The difference in the curves of o-Ps life－time with temperature between the liquid crystal and the liquid crystal polymer was explained．

(1) The adsorption of dodecylammonium acetate (DAA) on CAB-O-SIL has been investigated, the adsorption isotherm of DAA shows two plateaus (i.e. LS-type). (2) The addition of sodium chloridc increases the adsorption of DAA, but no significant change can be found in the first plateau at low concentrations; while the addition of hydrochloric acid decreases the adsorption of DAA in the experimental concentration region. (3) The stability of CAB-O-SIL suspension has been determined for the corresponding solutions. (4)Based on the two-step model of the surfactant adsorption theory proposed previously, and with the aid of conductivity measurements, the coagulation regularity of CAB-O-SIL suspension can be explained satisfactorily.

 Metal hydride (Mm(NiMnCoAl)5) electrodes were chemically activated to improve their caparitiy, electrocatalytic activity, activation characteristics, and high-rate discharge ability. The influences of chemical action on the electochemical properties of metal hydride electrodes and sealed formation of Ni-MH batteries were discussed. Under the action of activator the oxide on the surface of hydrogen storage alloys were reduced and eliminated. The atomic hydrogen could penetrate into the lattice forming hydride. In addition, the specific surface area of MH electrode increased. It was found that the performances of Ni-MH batteries by sealed formation approached to those of the batteries by open formation. The discharge capacity of the AA size Ni-MH battery is about 1050~1150 mA•h. The capacities at 1C, 3C and 5C rate reach 96.7%, 89.0% and 83.8%of that at 0.2C rate respectively.

 The relationship of the synthesis conditions of the materials, modification of their imperfect structure as well as electrochemical performances are investigated systematically for the series of complex oxides LixCo1-yNiyO(2-δ) (x=1, 0<y<0.5). The results indicate that during the substitution of Co ion Ni2+ ion occupies the A site with finite probability. The empties A or B and O sites occur with different proportion when Ni2+ ions are dopped in ABO2 type of LiCoO2. The Co ion have a super-high average valence state and the distance of Li(Ni)-O and O-O increase in the imperfect structure. Therefor, the conductivities of these series of complex oxides and the specific capacity of the batteries are increased.

The effects of high temperature water steaming (HTWS) on the structure of HZSM-5 and ZnHZSM-5 catalysts have been investigated using XRD, XPS and IR spectrum of adsorbed pyridine, and the aromatization of propane has been tested as a probe reaction to show the change of catalytic performance. The result indicate that the treatment of HTWS nearly has no significant effect on the crystallinity of zeolite catalysts, but it lead to the dealumination of zeolite framework and the migration of zinc ions departing from the cation positions and results in the enrichment of aluminum and zinc content on the outer surface of zeolite crystallites and the decrease of catalyst acidity, and comparing the variation of Si/Al with Zn/Si and Zn/Al, it is shown that the framework aluminum species with zinc counterions are more difficult to detach from the framework than those with proton counterions. The variation of the reaction activity and selectivity of propane aromatization also verifies that the active centers of B and Zn-L acids are diminished differently depending on the treatment of HTWS processing. 

The framework topology of zeolite beta containing TEA+ compounds as templates is that A, B and C three ordered polytypes, pile up stacking fault structure along [001] orientation. The probability of A, B and C polytypes appeared in zeolite beta is 0.31, 0.36 and 0.33 respectively and does not change with the ratio of silica to alumina. Owing to the four connected modes of building unit I that formed framework of zeolite beta having the same energy, the above probability values come near. In the course of crystal growth the arrangement of TEA+ which sustains the three dimensional channel of the A, B and C is different. The little difference among probability values stems from the fact that the arrangement of B is easier than that of C and the arrangement of C is easier than that of A. Using this template, only zeolite beta with stacking fault structure can be synthesized. In the case, the necessary amount of template is more than that for molecular sieves with two or one dimensional channels and smaller templating molecule, lower reaction temperature and longer crystallization time are advantageous.

 A statistical distribution model was summarized for the cluster ions generated from laser vaporization. In this paper, a distribution funetion has been deduced for the laser generated cluster ions. To deduce the equation, kinetic equations were presented for the cluster ions based on ion-molecular reactions, the Smoluchowski equation was extended to described the reaction, and an irreversible aggregation process was assumed in which all charged and neutral cluster species have equal aggregation rate constant. Distribution of the deduced equation is shown to agree very well with the statistical size distribution of cluster ions observed in experiments.

Direct carbonylation of methane on silica-supported noble metal catalysts was tentatively investigated by using temperature programmed pulse reaction (TPPR), constant temperature pulse reaction (CTPR) and surface reaction of probe molecules CH3I (SRPM). An important approach is to split the overall reaction into two reaction steps occurring under moderate conditions. Methane decomposition on transition metal surface was first employed to form surface carbonaseous species. Then CO was introduced to interact with surface carbonaceous species to produce aldehyde. In such a two-step route the thermodynamic limitations can be overcome and the direct carbonylation of methane may be effectively achieved. This reaction is an attractively novel route for the utilization of methane. Optimization of this process might result in a new route for effective ultilization of methane.

FTIR is used to study the adsorption behavior of the precursor powder of Bi-system superconductor ground in atmosphere of air and ar n respectively. The results show that grinding operation in air causes chemical adsorption of CO2 and H2O from air by the superconducting powder, while the same operation in Ar causes no chemical adsorption. The adsorption mechanism is analyzed by means of characterization of the crystal structure of Bi-system superconductor.

 The coalescence process between two small liquid drops in surfactant solutions has been studied. A model is developed for the dynamics of the thinning dimpled film in which the influence of London-van der Waals forces is considered. The effects of surface diffusion, interfacial viscosities, and interfacial tension gradient on coalescence are investigated. The coalescence time, which is the time required for the thinning and rupture of the liquid film, is expressed as a function of the drop sizes, the physical properties of two liquid phases, and inter facial properties. The predictions are in od agreement with the previous experimental data.

The effects of D-glucosamine schiff base and its metal complexes on the growth of Aerobacter aerogenes were investigated by the microcalorimetry. Among the substances tested. Zn-SG was shown to be the most bacteriostasic, followed by Zn-o-VG and SG (with the Ic50 of 242, 287 and 320 μg•mL-1, respectively). Cu(Ⅱ)-SG showed less inhibitory effect on Aerobacter aerogenes over the concentration rang of 50~300μg•mL-1.

The polyurethane emulsion was prepared by introducing carboxylic groups into urethane chains, and its rheology was investigated with rotation viscosimeter. The results of rheology showed that the polyether-urethanc emulsion exhibited the character of Newtonian liquid. The viscosity and stability of the polyurethane emulsion depended on the temperature and carboxylic group content.

 We have demonstrated an electroluminescent (EL) device having the structure of ITO/PPV/Alq3:PVK/Al. This device could be driven by either forward bias or backward bias, and its EL originated from PPV layer.

Ti(IV) oxide has been an important semi-conductor material in photoelectrochemical cell, especially in the area of developing photochemical nanocrystalline solar cell. The TiO2 films were deposited on SnO2 (F-doped) glass electrodes by anodic oxidative hydrolysis of acidic aqueous TiCl3 solutions. The films are uniform in thickness, have an average size of approximately 20nm, and have the anatase structure after annealing at 450℃. The method of anodic oxidative hydrolysis, the method of electrodepositing high pure TiO2 (anatase) on transparent conducting oxide (TCO) glass, condition of producing TiO2 film, and some character of the film have also been investigated.

The title compound [Cu4Cl4(TTTA)2](TTTA=1,3,5,7-tetramethyl-2,4,6,8-tetrathiaadamantane, C10H16S4) crystallizes in space group P1 with a=8.5651(11), b=9.0471 (8), c=12.1586(9)Å, α=78.041(7), β=63.321(8), γ=62.552(10)°, V=781. 1 (3) Å3 and Z = 1. The full- matrix least- squares refinement gave R=0.0467 for 2689 observed reflections (I >3.0σ(I)). The crystal structure consists of one-dimensional chains of [Cu4Cl4(TTTA)2]∞, the repeat unit of which is composed of a [Cu4Cl4] stepped cubande with two TTTA ligands. The TTTA ligand only provides two S atoms as two kinds of coordinating atoms, one of which is only used for coordination of Cu atoms in the unit, and the other as a bridge respectively connects two Cu atoms of two neighbour units to form the chains. The configuration around every Cu atom is distored tetrahedron.

N2 adsorption , mercury porosimetry and scanning electron microscope (SEM ) were chosen in this work to investigate the pore size distribution, pore shape, specific surface area and pore volume of expanded graphite, a new type of porous carbon material. The results showed that expanded graphite is dominated by middle and large sizes of wedge-pores with cross section of slit or poly n. It has a relatively medium specific surface area and may be suitab1e for adsorbing large molecules.