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Supramolecularly assembled water layers stabilized by sebacic anions in complexes of Zn(II) and Co(II)

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Science China Chemistry 2010年第12期53卷 2539-2546页

作者： XIAN HuiDuo,LIU JianFeng & ZHAO GuoLiang zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces Institute of Physical Chemistry,zhejiang normal university College of Chemistry and Life Science,zhejiang normal university,Jinhua 321004,China zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces Institute of Physical Chemistry Zhejiang Normal University Jinhua China College of Chemistry and Life Science Zhejiang Normal University Jinhua China

Two three-dimensional supramolecular water architectures,[Zn(phen)3]2 ·[Zn(C10H16O4)·(H2O)3]·(C10H16O4)2·20H2O(1) and [Co(phen)3]2 ·[Co(H2O)6]·(C10H16O4)3·30H2O(2)[phen=1,10-Phenanthroline,C10H16O4=sebacic dianion],have been synthesized and characterized by IR,elemental analysis,thermogravimetric analysis,and single-crystal X-ray *** two structures both contain extensive hydrogen bonding between water molecules as well as between water molecules and sebacic *** water molecules and sebacic acid O atoms assembled 2D supramolecular corrugated sheets with different morphology in the two complexes.

关键词： Zn(II) Co(II) complex sebacic acid crystal structure supramolecular self-assemble water cluster

Synthesis and Crystal Structure of Dichlorobis[N-(4-hydroxylsalicylidene)3-dimethylaminopropylamine]Ni(II)

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Chinese Journal of Structural Chemistry 2003年第5期22卷 544-546页

作者： FENG Yun-Long② (Institute of Physical Chemistry, zhejiang normal university, Jinhua 321004, China) zhejiang normal Univ Inst Phys Chem Jinhua 321004 Peoples R China

The title complex, C24H36Cl2N4NiO4, crystallizes in the monoclinic system, space group P21/c with a = 15.048(3), b = 6.578(1), c = 14.405(3) ? b = 103.03(3), V = 1389.2(5) ?, Z = 2, Mr = 574.18, F(000) = 604, Dc = 1.373 g/cm3 and m(MoKa) = 0.926 mm-1. The structure was refined to R = 0.0337 and wR = 0.0954 for 2381 observed reflections (I > 2s(I)). The coordination environment around the Ni atom is a distorted NiN2O2 square-plane composed of two nitrogen and two oxygen atoms from the neutral Schiff base ligand of N-(4-hydroxylsalicylidene)-3-dimethyl- aminopropylamine

关键词： nickel complex N,N-dimethylaminopropylamine Schiff base crystal structure

Synthesis and Crystal Structure of a Spiral-chain Manganese(Ⅲ) Complex Containing Azide Bridge,[Mn(bzan)N_3]_n

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Chinese Journal of Structural Chemistry 2002年第4期21卷 352-354页

作者： FENG Yun-Long (Institute of Physical Chemistry, zhejiang normal university, Jinhua 321004, China) Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004

The title complex, C22H22MnN5O2, crystallizes in orthorhombic system, space group P212121 with a = 6.887(1), b = 11.718(2), c = 25.721(5) ? V = 2075.7(7) 3, Z = 4, Mr = 443.39, F(000) = 920, Dc = 1.419 g/cm3 and m = 0.665mm-1 (MoKa). The structure was refined to R = 0.0593 and wR = 0.1427 for 3576 observed reflections with I ≥ 2s(I). The Mn(Ⅲ) atom is coordinated to one bzan2- [bzan2- = N, N-ethylenebis(benzoylacetoneiminato)] ligand binding in the equatorial mode and two N3- ions in the axial positions. The azide acts as a trans--(1, 3) bridge, resulting in an infinite helical chain propagating along the b axis.

关键词： benzoylacetone Schiff base manganese complex crystal structure

Strong uniqueness of best approximations in spaces of bounded linear operators

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Science China Mathematics 2004年第3期47卷 339-351页

作者： LI Chong HE Jinsu Department of Mathematics, zhejiang university Hangzhou 310027, China Department of Mathematics, zhejiang normal university Jinhua 321004, China Department of Mathematics Zhejiang University Hangzhou China Department of Mathematics Zhejiang Normal University Jinhua China

The present paper is concerned with problems of the strong uniqueness of the best approximation and the characterization of a uniqueness element in operator *** results on the strong uniqueness of the best approximation operatorfrom RS-sets are proved and the uniqueness element of a sun in the compactoperator space from c0 to c0 is characterized by the strict Kolmogorov's *** recent results due to Lewicki and others are extended and improved.

关键词： best approximation operator, RS-set, sun, strong uniqueness, uniqueness element.

Generalized dromions of the (2+1)-dimensional nonlinear Schrdinger equations

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Communications in Nonlinear Science and Numerical Simulation 2001年第1期6卷 50-53页

作者： Jiefang ZHANG (Institute of Nonlinear Physics, zhejiang normal university, Jinhua 321004, China) Institute of Nonlinear Physics Zhejiang Normal University Jinhua 321004 China

We derive the generalized dromions of the (2+1)-dimensional nonlinear Schrodinger equations besides the basic dromion solutions by suitably utilizing the arbitrary function in the bilinearized equations. The rich drom... 详细信息

关键词： dromion (2+1)-dimensional nonlinear Schrdinger equations

A lower bound on the total signed domination numbers of graphs

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Science China Mathematics 2007年第8期50卷 1157-1162页

作者： Xin-zhong LU Department of Mathematics,zhejiang normal university,Jinhua 321004,China Department of Mathematics Zhejiang Normal University Jinhua China

Let G be a finite connected simple graph with a vertex set V (G) and an edge set E(G). A total signed domination function of G is a function f : V (G) ∪ E(G) → {?1, 1}. The weight of f is w(f) = Σ x∈V(G)∪E(G) f(x). For an element x ∈ V (G) ∪ E(G), we define $f[x] = \sum\nolimits_{y \in N_T [x]} {f(y)} $ . A total signed domination function of G is a function f : V (G) ∪ E(G) → {?1, 1} such that f[x] ? 1 for all x ∈ V (G) ∪ E(G). The total signed domination number γ s * (G) of G is the minimum weight of a total signed domination function on G.In this paper, we obtain some lower bounds for the total signed domination number of a graph G and compute the exact values of γ s * (G) when G is C n and P n .

关键词： total signed domination function total signed domination number 26A33

Effect of lead on survival, locomotion and sperm morphology of Asian earthworm, Pheretima guillelmi

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Journal of Environmental Sciences 2009年第5期21卷 691-695页

作者： ZHENG Rongquan, LI Canyang College of Chemistry and Life Science, zhejiang normal university, Jinhua 321004, China. College of Chemistry and Life Science Zhejiang Normal University Jinhua 321004 China

To provide basic toxicity data for formulating risk characterization benchmarks, the effects of lead on survival, locomotion, and sperm morphology were investigated in the Asian earthworm Pheretima guillelmi. The LC50 of P. guiUelmi for 7 and 14 d were 4285＋339 mg/kg and 3207＋248 mg/kg, which shows P. guillelmi can tolerate a higher concentration of lead nitrate. The average weight of the surviving earthworms decreased at concentration of 2800 mg Pb/kg soil, and the locomotor ability of earthworms exposed to a range of soil Pb concentrations showed a general decrease with increasing Pb concentrations. We also presented data depicting the sperm morphology of earthworms, which shows potential as a sensitive biomarker for measuring the effects of heavy metal on reproduction.

关键词： lead Pheretima guillelmi sperm morphology locomotion

New multisoliton solutions of the(2+1)-dimensional dispersive long wave equations

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Communications in Nonlinear Science and Numerical Simulation 2001年第3期6卷 178-182页

作者： Jiefang ZHANG and Ping HAN Institute of Nonlinear Physics, zhejiang normal university, Jinhua 321004, China College of Engineering, zhejiang Ocean university, Zhoushan 316004, China Institute of Nonlinear Physics Zhejiang Normal University Jinhua 321004 China College of Engineering Zhejiang Ocean University Zhoushan 316004 China

Using the extension homogeneous balance method, we have obtained a nonlinear transformation to simplify the (2+1)-dimensional dispersive long wave equations into a linear partial differential equation, and found some ... 详细信息

关键词： multisoliton (2+1)-dimensions dispersive long wave equations

Codimension 3 nonresonant bifurcations of homoclinic orbits with two inclination flips

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Science China Mathematics 2005年第2期48卷 248-260页

作者： SHUI Shuliang & ZHU Deming College of Mathematics and Physics, zhejiang normal university, Jinhua 321004, China Department of Mathematics, East China normal university, Shanghai 200062, China College of Mathematics and Physics Zhejiang Normal University Jinhua China Department of Mathematics East China Normal University Shanghai China

Homoclinic bifurcations in four-dimensional vector fields are investigated by setting up a local coordinate near a homoclinic orbit. This homoclinic orbit is principal but its stable and unstable foliations take inclination flip. The existence, nonexistence, and uniqueness of the 1-homoclinic orbit and 1-periodic orbit are studied. The existence of the two-fold 1-periodic orbit and three-fold 1 -periodic orbit are also obtained. It is indicated that the number of periodic orbits bifurcated from this kind of homoclinic orbits depends heavily on the strength of the inclination flip.

关键词： bifurcation, homoclinic orbit, non-resonance, inclination flip, 1-periodic orbit.