At room temperature, LaNi5-based multicomponent alloys can easily react with Cu2+ aqueous solution (such as the CuSO4 solution). The elements La, Ni, Co, Mn and Al in the alloys were oxidized to form their ions correspondingly, and the Cu2+ ion was reduced to precipitate as metal copper.

The mechanism for the effects of titration order, ageing medium and ammonia concentration on the properties of ZrO2 aerogels has been well discussed in the present paper. Different morphologies of ZrO2 aerogels obtained are due to different process of hydrolysis and condensation in different titration order, or to the ageing mechanism in different ageing medium; the effect of ammonia concentration on ZrO2 texture has been related to the free volume of particles and the inhibition to condensation reaction, and ageing process enhances this effect remarkbly.

The emission spectra and their lifetimes of the complexes of Eu(Ⅲ) and Tb(Ⅲ) with mixed β-diketone and organic ligands were studied by laser induced fiuorescence technique. The energy levels of the centered metal ions were less affected by different ligands (less than 100cm-1), but the lifetimes and the emission intensities of the ions depends on the efficiency of the energy transfer between the ligand and the ions. The energy levels split in strong ligand fields. The emission spectra of Eu(Ⅲ) complexes gave a set of energy constants of the 7F and 5D states of Eu(Ⅲ) as following: for 7F: A=305cm-1, B0=3660cm-1; for 5D: A=1744cm-1, B=27699cm-1.

The isothermal phase diagram for the system sodium dodecyle sulfonate/n-butanol/20% styrene/water has been determined at 40 ℃ The freeze fracture electron microscope, ESR, FT-IR have been used for determining the structures of microemulsions. The investigation shows that, with the increase of H2O-content the bicontinuous structural microemulsions determined by conductivity measurement under a change from W/O to bicontinuous (BC) and to O/W when the content of styrene is constant (20%). The stretching vibration and the bending vibration frequencies of OH in W/O microemulsions are less than those in O/W microemulsions, which indicates that the association strength of the hydrogen bonds in W/O microemulsions are much stronger than those in O/W microemulsions. The correlation times, τc, in O/W microemulsions, are longer than that in W/O microemulsions, indicating that the microviscosity in O/W microemulsion interface is higher than that in W/O microemulsion interface.

A new macrocyclic dinuclear nickel(Ⅲ) complex, prepared by the condensation of 2,6-diformylpyridine N-oxide with 1,3-diaminopropane in the presence of Ni(Ⅱ)Cl2•6H2O and formulated as Ni2LC16•C2H5OH•10H2O, was characterized by elemental analyses, infrared spectrum, differential thermal analysis (DTA), thermogravimetry(TG) and investigated electrochemically. The results show that two nickel ions are situated at the same chemical environments in the compound and the electrode reaction can he thought as a double electron transfer process which is irreversible. The diffusion coefficient is 4.07 x 10-6cm2•s-1. The Ni complex exhibited od thermal stability, it decomposed with loss of its organic portion and the formation of Ni2O3 as a final product at 563 ℃.

 A thermodynamic study is reported for the coordination reaction of three new metal imidazolate complexes of unsymmetrical tetradentate schiff bases and four substituted imidazoles with zinc meta-substituted tetraphenylporphyrins (ZnT(m-X)PP, X=NO2, Cl, OCH3, H, CH3) in dichloromethane solvent by spectrophotometric technique. The isosbestic behavior is exhibited in the region between 450 nm and 700 nm. The equilibrium constants K at 25 ℃ were determined by the method of Rose-Dra . It was found that the stoichiometric number is unity for all 35 coordination reaction systems studied. A Hammett linear relationship exists between the ratio or equilibrium constant and the Hammett constant of substitutents on the phenyl ring of porphyrin.

SCF-MO-AM1 method has been employed to investigate the molecular geometries, electronic structures and thermolyses mechanism of 1,3,3-trinitro-azocyclobutane(TNAZ) and its three derivatives. It is found that the Wiberg bond orders of C-N bonds connecting with gemdinitro in these compounds are relatively smaller, and therefore, homolysis by breaking these bonds requires relatively low activation energies, and is probably the predominant initial reaction of thermolysis. A od linear relationship exists between the Wiberg bond orders of C-NO2 bonds of four titled compounds and the activation energies of the reaction of breaking this bond. The correlation coefficient is 0.99.

The three-photon resonant ionization spectroscopy of H2 B1∑u+-X1∑g+ (12,0) and C1Ⅱu-X1∑g+ (2,0) exhibits abnormal pressure effects. Some of them are observed for the first time. Pressure-induced abnormal line shift, line broadening, line splitting and spectral intensity variations can be well explained by a mechanism of reabsorption of the third harmonic generation in the medium. Approximate expressions considering the phase matching requirement yield lineshifts, -splitting and -intensities at different pressures in od agreement with the experimental results. Two similar spectra are detected by two tandem electrode pairs in a gas celll which give experimental evidence for THG reabsorption mechanism. The failure to obtain ion signal from circularly polarized light also supports the above mechanism.

Carbon cluster anions with an aluminum atom, CnAl-, were produced from laser ablation in the previous experiment. In this paper, theoretical studies of them have been carried out employing ah initio calculation at the RHF/6-311* level (ROHF for open shell species). Based on the optimized bond lengths, electronic configuration, total energy and fragmentation energy of six dissociation channels have been calculated and compared with the results of CnP-. The calculated results are in od agreement with tile experimental observation that CnAl- with even n is more stable than those with odd n. According to the calculations, C-Al bond of CnAl- with even n and C- C bond of those with odd n are the weakest bonds of the species.

In this paper, PARM al rithm which can be used in QSAR research was put forward. In this al rithm, a set of pseudo atom was defined and a series of pseudo receptor model was generated by using genetic al rithm. These models which have high correlation between receptor-liagnd interaction and bioactivity can predict bioactivity of unknown molecules. This al rithm was used to investigate the K+ channel opener system. The reasonable results were obtained.

The dissociative adsorption and oxidation of formic acid on Pt(100) single crystal electrode were investigated by using electrochemical techniques and in situ time resolved FTIR spectroscopy (TR-FTIRS). The results demonstrated that the distribution of the rate of dissociative adsorption of HCOOH on Pt(100) versus electrode potential yields a volcanic relationship between -0.25 and 0.25 V. Based on results of TR-FTIRS, we concluded that the dissociative adsorption of HCOOH on Pt(100) can be avoided by designing appropriate potential step program, which is the basis of further studies of the kinetics of direct oxidation of HCOOH into CO2 via reactive intermediates.

The bacterial growth thermogram curves under different acidities were determined. From these thermogram curves, the growth rate constants(k) at different acidities were calculated and the equation correlating of k with PH could be established. From these k-pH equations,the optimum acidity of bacteria growth could be obtained. These models provide a od method for the study of the metabolism of bacteria.

The SCN--BrO3-H+ system has been studied in the batch and CSTR. In the CSTR the system displays sustained oscillations and the periods of oscillations vary orderly with flow rates. The influences of ATP on the oscillations of SCN--BrO3-H+ system have also been observed.

Studies on the thermokinetic properties of model compound of Purple acid phosphatases (Na2[Fe2(μ-O)(μ-OAC)2(IDA)2].5H2O) hydrolysis of ATP, at 37℃, pH=6.0 by using LKB-2107 Batch microcalorimentry system. The Michaelis constant Km=(2.898 ± 0.195)×10-4mol•L-1 and rate constant k2=(4.617±0.193)×10-3•s-1 have been determined. The result has been discussed.

The photoionization efficiency curve (PIE) of C2H3Cl+ formation from C2H3Cl has been measured in wavelength region 105.0- 130.0nm, by using synchrotron radiation single- photon ionization and a quadrupole mass spectromemter as a detector. A series of peaks in region 106.0-117.0nm arise from Rydberg autoionization converging to A2A' state of the vinyl chloride ion, the average quantum defects are δ(ns) = 1.87, δ(np) = 1.51,δ(nd) = 0.22 respectively. The Rydberg transitions of π(2a") → 4d, π(2a") →5d, π(2a")→6s, π(2a") →7s have been assigned also.

The investigation on inhibition of xanthine oxidase by umbelliferone was carried out using a polyaniline-xanthine oxidase electrode. The experimental results indicated significant inhibition caused by umbelliferone. The apparent Michaelis-Menten constant (K'm) and the maximum rate (im) of the immobilized xanthine oxidase were both affected by umbelliferone. This indicated that umbelliferone acts as a mixed type of inhibitor of xanthine oxidase. The optimal pH of the immobilized enzyme was hardly affected by umbelliferone; The response current increases with increasing potential in the potential range 0.55~0.68V.

The preparation and cyclic voltammetric behaviors of self assembled monolayers (SAMs) containing electroactive viologen group have been investigated. Treatment of this viologen SAM with solutions of alkanethiols results in replacing the electroactive thiol, shifting negatively its formal potentials and decreasing its heterogeneous electron transfer constants along with the immersion time. The aim of the work is to understand the exchange regularity of the mired SAMs on ld electrode surface.

Beer's law experiment, variable-temperature spectral experiment of UV-Vis absorption, 1H NMR, and measurement of magnetic moment were conducted for NiTMPyP in aqueous solution. It was found that Beer's law was obeyed in concentration range 8× 10-7-2×10-5.mol•dm-3.With the temperature increasing from 0 ℃ to 95 ℃, the isosbestic point appeared at 435 nm and the lowest downfield 1H NMR peak narrowed gradually and shifted to upfield. The magnetic moment is 2.07 BM in D2O at 30 ℃, but in the D2O-CD3COCD3 mixed solvent there was no evidence for the existance of paramagnetic species. These results show that NiTMPyP exists in aqueous solution as an equilibrium mixture of diamagnetic, four-coordinate nickel (Ⅱ) and paramagnetic, sir-coordinate nickel (Ⅱ) complexed by water molecules in the axial position. The thermodynamic parameters of the axial-coordinated reaction were △S?=-178.6 J•K-1•mol-1, △G298K?=-1.6 kJ•mol-1.

The fluorescence kinetic characteristics of binary complex Ti-3,5-dibromosalicylfluorone (Ti-3,5-DBSAF) was studied by stopped-flow fluorescence kinetic method, the results show that its rate equation is R=k•[Ti4+]•[H4R]•[H3+ O]-1, refering to Eigen-Tamm mechanism, the reasonable mechanism is derivated. The possibile geometric structure of the binary complex was also discussed.

A polydiacetylene nanocrystalline film has been fabricated using surface evaporation method and observed by using Aurora 2000, TopoMetrix scanning near-field optical microscope (SNOM) system. The SNOM images of this film together with the standard testing Al sample indicate that the resolution of the system is better than 80 nm 1/6 of the incident wavelength, 488 nm. The possibility of SNOM data storage using thus fabricated film is also demonstrated.