Sodium Ion-linked Waugh Polyanion with a 4,4-Connected Layered Structure

A new polyoxometalate comPOund formulated as Na2（C3H5N2）4[MnMo9O32]·2H2O 1 has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectrum and single-crystal X-ray diffraction. The title compound crystallizes in the monoclinic system, space group C2/c, with a = 16.076（2）, b = 14.6488（19）, c = 18.767（2）A ,β = 108.6030（10）°, V = 4188.6（9）A^3, C12H24MnMo9NsNa2O34, Mr = 1788.77, Dc = 2.837 g/cm^3,μ（MoKa） = 3.024 mm^-1, F（000） = 3396, Z = 4, the final R = 0.0270 and wR = 0.0605 for 3829 observed reflections （I 〉 2σ（I））.

Synthesis and Crystal Structure of [VO_2(C_(17)H_(11)N_3O_2)][VO(C_4H_(13)N_3)(C_6H_5N_3O)](C_2H_5OH)

The reaction of VO（acac）2 with 2-hydroxyl-1-naphthaldehyde isonicotinyl hydrazone and amines （ethylenediamine or diethylenetriamine） in CH3OH yields crystals of novel vanadium compounds characterized by IR, NMR spectroscopic methods and X-ray single-crystal structure determination. Two different vanadium units exist in the crystal cell of [VO2（C17H11N3O2）][VO- （C4H13N3）（C6H5N3O）]（C2H5OH） which crystallizes in the triclinic system, space group P1 with a = 8.0104（17）, b = 13.898（3）, c = 14.955（3）A, α = 89.103（4）, β = 79.551（4）, γ = 78.352（4）°, V = 1603.3（6）A^3, Mr = 723.54, Dc = 1.499 g/cm^3, Z = 2, λ（MoKα） = 0.71073 ]A,μ= 0.644 mm^-1, F（000） = 748, the final R = 0.0547 and wR = 0.0997 for 8920 observed reflections with I 〉 2σ（I）. According to structure analysis, two different molecules are arranged in the lattice and the two vanadium atoms adopt octahedral and square pyramidal coordination geometries, respectively. The interactions between DNA and vanadium complexes have been investigated by UV-Vis absorption spectro- photometry.

Crystal Structure of catena-[(Tetrakis-μ_2-acetato-μ_2-4,4'-bipyridine) dicopper(Ⅱ)] Acetonitrile Solvate

The title compound, [Cu2（CH3COO）4（C8H10N2）]n·nCH3CN 1 （C8H10N2, 4,4＇-bipy = 4,4＇-bipyridine）, has been solvothermally synthesized in CH3CN and characterized by X-ray diffraction. The crystal is of monoclinic, space group Cc with α = 22.626（6）, b = 14.012（4）, c = 15.106（4） ]A, β = 107.610（3）°, V = 4565（2） ]A^3, C20H23Cu2N3O8, Mr = 560.49, Z = 8, Dc = 1.631 g/cm^3,μ = 1.914 mm^-1, Flack parameter = 0.48（1）, F（000） = 2288, R = 0.042 and wR = 0.098 for 8887 observed reflections （I 〉 20（I））. It consists of nearly linear one-dimensional chains [Cu2（CH3COO）4（C8H10N2）]n derived from paddle-wheel [Cu2（CH3COO）4] unit linked by 4,4＇-bipy, and CH3CN as guest molecule regularly decorates between the chains.

THE CHARACTERISTIC STRUCTURE AND ITS FORMATION MECHANISM OF GEL-SPUN UHMW-PE FIBERS

Ultra-high strength and modulus polyethylene fibers can be produced from UHMW-PE(ul-tra-high molecular weight polyethylene) by gel spinning and ultra-high drawing method.The spe-cial supermolecular structure of″shish-kebabs″ is the intrinsic course for the fiber having highperformance.In this paper,the formation mechanism of the characteristic structure of PE fibershas been investigated by means of SEM,DSC,WAXD,SAXS and TEM,The experimental resultsshow that the extended-chain structure of PE fibers is formed originally from the bridged mole-cules in amorphous region and increased gradually during further drawing porcess.The″shish-kebab″ structure is formed by the combination of extended-chalnS and originalfolded-chains.

分形自我与自然构成:道家圣人和混沌理论

道家思想中自我与环境的相互关联，一直以来都在各种各样的语境下有过探究。本文从混沌理论的整体视角探究道家关系性自我的观点，强调混沌理论及其与道家思想关联的以下几个方面：（1）道家“无为”观念的完美相合性；（2）处于混沌之边的“阴阳”；（3）万物自然生发性；（4）道家警诫世界的断裂式分形。最后的结论是，自我拥有成为世界的潜能。要接近此一扩展状态，自我必须致力且敢于打开自身，穿越错综复杂的自然，与万物进行沟通。自我在与世界开放沟通的过程中不断进行着转化，也造成一个始终变化的世界。

Molecular Mechanism of High Energy Proton Radiation——Raman Spectroscopic Character of Microcosmic Damage in the Space Structure of DNA

High energy proton is an important type of the space radiation. The paper investigates the radiatione ffect of high energy proton (27.9 MeV) on DNA aqueous solution in the field of the molecular mechanism. The following information about the microcosmic damage to the space structure of DNA was obtained: (ⅰ) breakage of a part of interbase hydrogen bonds which maintained double helical structure of DNA; (ⅱ) damage on four bases, in which the damage on adenine ring was the most serious; (ⅲ) obvious change of deoxyribose; (ⅳ) serious damage on backbone phosphate ion (PO_2^-) and phosphate diester (PO_2) and the occurrence of scissions of double-stranded and single-stranded DNAs; (ⅴ) obvious decrease in the amount of B-form conformation.

Effects of Thermomagnetic Treatment on Microstructure and Mechanical Properties of Rolling Bearing Steel

The influence of the thermomagnetic treatment on metallurgical and mechanical properties of the rolling bearing steel was investigated. The heating and/or cooling and tempering processes of the samples occurred in a magnetic field having certain strengths. The X-ray diffraction （XRD） patterns of the rolling bearing （RUL 1） steel samples exhibited a beneficial effect of the magnetic field on the structure, phase transformation, and tension state. An increased fatigue reliability was found for the rolling tribomodel made from thermomagnetically treated steel.

APPLICATION OF THE DENSITY WAVE THEORY OF ATOMIC CONFIGURATION TO THE OXYGEN ORDERING ON BASAL PLANE IN YBa_2Cu_3O_(7-x) SUPERCONDUCTOR

The ordered structures of oxygens and vacancies on the basal plane in YBa_2Cu_3O_(7-x) are investigated. The density wave theory of atomic configuration is extended to the crystal lattices composed of several interpenetrating Bravais sublattices, with the secondary ordering emphatically considered. Four kinds of Standard composition structures have been obtained, which correspond to x=0, 0.25, 0.5 and 0.75. respectively. Comparisons with experimental results are made.

THE CRYSTAL STRUCTURE OF WOLFRAMOIXIOLITE

In 1969, Soviet mineralogists first reported wolframoixiolite, but failed to produce further data on it because of poor crystalline. We have carried out detailed single-crystal research on it and ascertained its structure. The composition of the wolframoixiolite occurring in the Soviet Union and Hunan, China is specified in

Electronic Structure and Properties of Ni Metal~*

By means of one-atom state method, the electronic structure of Ni metal has been determined to be [Ar] (3d_n)^(2.69)(3d_m)^(0.66)(3d_c)^(5.24)(4s_c)^(0.25)(4s_f)^(1.16), by which the potential curve, lattice constant, cohesive energy, verious elastic moduli and the temperature dependences of linear thermal expansion coefficient and specific heat have been calculated. The theoretical values of these properties are in good agreement with experiments, showing the basic completeness of the systematic analysis of Ni metal along electronic structurecrystal structure-physical properties.

STUDIES ON REDOX PROPERTIES OF HETEROPOLY ACIDS (SALTS) AND THEIR DERIVATIVES WITH KEGGIN AND DAWSON STRUCTURES

We have systematically studied redox properties of two series of several dozen heteropoly acids (salts) and their derivatives with vanadium and rare-earth elements with Keggin and Dawson structures, e. g. LnHSiMo_(12), SiMo_(12-n)V_n, M_(1.5)PMo_(12), PMo_(12-n)V_n, PW_(12-n_V_n, Ln(PMo_(11))_2, Sm(XMo_(11))_2 and P_2Mo_(18-n)V_n, etc., and obtained their sequence of oxidation. It was found that there is a linear relationship between the reduction potentials of heteropoly anions and the derivatives of heteropoly anions with rare-earth elements with Keggin structure and nq^2 (n and q are the principal quantum number and charge of the central ion respectively). On the basis of the electrostatic model the regularity of oxidation and reduction was rationalized.

CRYSTAL AND MOLECULAR STRUCTURES OF η4-OLEFIN CARBENE COMPLEX[(η4—C6H5CH=CH（?）CH（C6H4CH3—m）N（C6H5） C（OC2H5）=]Fe（CO）2·1/2C6H5·CH3

<正> Ⅰ. INTRODUCTION The transition metal carbene compound with olefin ligand is an important intermediate in the metathesis of olefin, cyclopropanation of alkenes and Ziegler-Natta Polymerization of olefin. The synthesis and structure of the