The negative ion time-of- flight mass spectra of C60 benzyl derivative and C60/polystyrene mixtures were investigated by UV laser desorption. We found that the aggregation of C6o in derivatives and ndt1lres was very different. The mechanisms of the coalescence of C6o and the growth of C60 by capturing small carbon clusters were discussed. We thought that in derivatives the nascent C60 formed from the rupture of the radicals can easily coalesce into large fullerenes through co1lisions, while in mixtures C60 and small carbon clusters can grow into large fullerenes only when C60 and small carbon clusters were in proper ratio, but no coalescence of C60 was observed.

One-dimensional surfaces are produced by Weierstrass-Mandelbrot Function. Light scattering characteristics of these surfaces are studied under the condition of geometrical optics. It is found that surfaces with large fractal dimension D, which were thought to be more ragged, have a sharper scattering distribution than those with small D. Explanation of this result is also presented.

 The structure of CuO-BaO/SiO2 catalysts and their reduced states has been characterized by means of XRD, XPS and EXAFS. Both the results of XRD and XPS indicate that(topper and barium in CuO-BaO/SiO2 exist in CuO and BaO respectively and the SiO2 support has influence on the structure of CuO. The EXAFS results show that the coordination number and length of Cu-O shell and Cu-Cu shell gradually decrease with the supported content decreasing and the extent of decrease is the largest for low supported content samples. When the supported content exceeds 13.39%, CuO in samples is in crystalline state, when the supported content is smaller or equals 13.39%, CuO in samples is in monolayer dispersion state. In the reduced catalyst samples, only metal copper is detected. With the content of CuO in CuO-BaO/SiO2 decreasing, the length and coordination number of Cu-Cu bond of metal copper on reduced catalyst surface also decrease gradually.

The reaction of methylene radical CH2(X3B1)with molecular oxygen was investigated with Time-Resolved Fourier Transform Infrared spectrometer(TR-FTIRS). Pure CH2(X3B1)radicals were produced by UV photolysis of ketene at 351nm. Vibrationally excited products OH(or H2O) and H2CO were observed in the infrared emission spectra. The H2CO channel was verified as a product of elementary reaction. The nascent vibrational distribution of CO and CO2 were obtained. The most populated vibrational level was v=4 for both the CO and CO2.

The local mode model was used to describe the stretching vibration of C-D bonds ofC2D2, while C-C bonds was described in terms of the normal mode model. Hamiltonian was set up and used in non-linear least-squares program to derive the potential parameters. The calculation agree well with observation with a standard deviation of 1.14cm-1.The derived parameters were then used to predict those unexplored stretching vibrational states of C2D2and C2H2。

 A method for preparing of atomical flat ld substrate was reported. A series of ld substrates were prepared with the method from 25 C to 270 C and were characterized by using Scanning probe Microscope(SPM). The results show that the mean roughness values of these ld substrates are smaller than 0.4 nm for areas of 25 μm2. A higher resolution image made by using Scanning Tunneling Microscope (STM) shows a hexa nal pattern of high spots with nearest neighbor spacing of 0.30±0.04 nm, which is consistent with a Au-(111) lattice. Meanwhile, self-assembled monolayer film of 1,6-hexanedithiol on the ld has been characterized by electrochemical cyclic voltammetry and X-ray photoelectron spectra.

The photolysis of coenzyme B12 (5'-deoxyadenosylcobalamin, AdoCbl) at 355nm in aqueous solution is investigated by Photoacoustic Calorimetry (PAC). Both enthalpy and reaction volume change for this photoinitiated reaction have been determined to be 131±12 kJ.mol-1 and 61 mLmol-1 , respectively. It can be suggested that the reaction volume change is related tothe conformational change of corrin ring which accompanies the homolytic cleavage of the cobalt-carbon(Co-C) bond.

The microwave preparation of narrowly distributed colloidal microlatex particles of polymethyl methacrylate (PMMA) and polystyrene (PSt) under normal ambient pressure is re-ported. There are no any surfartants in the system. The total synthesis time has been reduced from much longer time(conventional method) to less than 1 h(microwave method). The dynamic experimental results indicate that the reaction velocity of PMMA is faster than PSt, which maybe due to PMMA absorbing much more microwave radation than PSt. The particle size can be controlled by changing initial recipe. The microparticle volume is plotted versus the concentration of the added monomer at constant concentration of initiator. The linear least-square fitting convincingly shows that the number of the particles is constant. This fact also indicates that the microwave radiation favors the simultaneous nucleation and results in formation of monodisperse system.

SrTiO3 was synthesized by microwave heating. The shorter synthesis time and simpler processing show the potential applications of the mirowave synthesis method. The influence of synthesis conditions on the product properties was discussed in detail. The results show that the microstrcture and grain size distribution of SrTiO3 obtained by employing microwave heat are better than that produced by conventional heating.

By means of the molecular dynamics simulation technique , a series of simulationsof liquid Au have been performed over the temperature range of l573 K to 200 K. During the simulation process, the EAM potential has been adapted and the pair distribution f1lnction and structure configuration of atom have been obtained. Some simulation results have been discussed by the pair analysis technique.

The pulse microreaction technique was used to examine the effect of addition of alumina on the catalytic and surface properties of amorphous NiB alloy. Gas-phase hydrogenation of benzene was chosen as probe reaction. The structure, composition and crystallization were determined by XRD, ICP and DSC, respectively. The surface properties were characterized by TPR and TPD. The results indicated that, addition of alumina increased the activity, thermal stability, and sulfur resisting property of NiB alloy. Comparing the two kinds of methods of addition, impregnation was superior to mechanically mixing. The result of the dynamic studies on pulse reaction showed that benzene hydrogenation over amorphous NiB alloy, NiB+Al2O3, NiB-Al2O3 followed Langmuir-Hinshsood model, the sequence of activation energy over the samples was as follows :Ea(NiB)> Ea(NiB+Al2O3)> Ea(NiB-Al2O3). The results of TPR and TPD indicated that addition of alumina decrease the types of absorbing sites, but increase the amount of absorbtion obviously.

2,3,5,6-Tetrachloride-quinone was anchored to a ld surface through the self-assembled monolayers of dithiol [DT HS-(CH2)n-SH n=2,4,6,8,10]. The surface coverage of the anchored TQ was esteminated to be 4.9 ×10-11 mol•cm-2. The electron transfer rate constant Ket associated with the redox process of anchored film decreased from 6.75 s-1 at n=2 to 0.169 s-1 at n=10 with increasing the chain length of the DT SAMs througth the redox potential of TQ. The turning barrier coefficient(β) of the electron transfer was estimated to be 0.82Å-1 from the observed linear relationship between the Ket and the monolayer chain length.

The glass-ceramics of CaO-M -Fe2O3-Al2O3-SiO2 slag was prepared. Crystallization kinetics parameter and activation energy of the system were investigated by the kinetics theory and DTA technique. The crystallization mechanism of two-dimensional crystal growth and m=n=2 was determined. The activation energy calculated was 272.6 kJ•mol-1. The microstructure obtained by the SEM technique indicated that the mechanism of crystal growth is in od agreement with the result predicted.

The interaction between BSA (Bovine Serium Albumin)and SDBS (Sodium Dodecyl Benzene sulfonate) at water - air interface of aqueous solution was investigated by ADSA(Axisymmetric Drop Shape Analysis) method. The surface tension responses to time were measured and compared. The results showed that (1) ADSA is a od methed to study the dynamic change of surface tension to the time; (2) While SDBS concentration was less than its CMC, it could interact with BSA macro-molecule in the solution to form a complex which was more surface active than both BSA and SDBS, and its conformation change in the adsorption layer was similar with that of BSA alone, (3) While SDBS concentration was larger than its CMC, its micelle could solubilize the BSA macro-molecule and the surface tension and the conformation change in the adsorption layer was very similar with these of SDBS solution alone.

Electrochemical reaction between K4[Fe(CN)6] and K3[Fe(CN)6] on glass electrode deposited with In2O3 was studied with graze ellipsometry combined with cyclic voltammetry. The results indicated that graze ellipsometry possessed not only time-resolved function, but also space-resolved function. Graze ellipsometrical parameters reflected some information of physicochemical properties of interface and diffusion layer near the electrode surface. Change of the pattern of the graze ellipsometric parameters represented change of rules of the physicochemical properties. And the rules revealed the order to random situation of the particles' distribution near the electrode surface and were helpful to analyze the properties of the diffusion layer reliably.

In this paper, the fluctuation of the bistability chemical reactions system is studied. The fluctuation is always very small except in the narrow region, where we find a remarkable peak at the equal-probability point. This behavior is easily understood by the approximation of probability distribution. It is revealed that the behavior at the equal-probability point, like the first-order transitions in equilibrium systems, possesses the feature of first-order-like transitions.

Jet cooled CN radical beam was formed by cold cathode DC discharge of CH3CNunder molecular beam conditions. The cylindrical cold cathode was placed between the skimmer and the nozzle to prevent the nozzle from being clogged by carbon particles. The pulsed photon counting LIF measurement was seriously jeopardized by the high intensive scattering laser light due to CN(B2Σ)'s short lifetime (70ns) and weak fluorescence. By using an attenuator to reduce laser intensity or a polaroid to reduce the scattering laser intensity, we obtained LIF spectra with od S/N ratio. With the theoretical simulaed spectra, the effects of laser p0larization on LIF were discussed and the relative populations of CN rotational and vibrational states were obtained.

AM1 SCF calculations have been carried out to study thermolyses of formacyl and benzoyl azides. The results show that these thermolyses have several reaction routes yielding different products.