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Liu K.L.,Zhou Kou Normal University | Du Y.D.,Zhou Kou Normal University | Wang Y.Q.,Zhengzhou University of Light Industry
2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings | Year: 2011

Fe3O4 powders with highly crystalline have been synthesized by a sol-gel auto combustion synthesis method accompanying thermal process. The phase structures, morphologies of Fe3O4 have been characterized by x-ray powder diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive x-ray spectrometer (EDX). The results show that complete and highly crystalline nature magnetite powders can be obtained. Furthermore, the roomtemperature magnetizations and the resistance of Fe3O4 powders were also measured. The maximum magnetization of sample S1, S2and S3 is 88.3, 87.32 and 89.4emu/g at the applied magnetic field 5kOe, respectively, which are larger than the saturation magnetization of the bulk γ-Fe2O3 (76emu/g). It is proved further that Fe3O4 powders can be synthesized by the citrate-nitrate solgel auto combustion reaction method. The preliminary reaction mechanism is also discussed. © 2011 IEEE.

Wang F.,Zhou Kou Normal University | Li Y.,Zhou Kou Normal University | Li X.J.,Communication University of China
Proceedings - 2011 International Conference on Network Computing and Information Security, NCIS 2011 | Year: 2011

In order to reduce the harm of malicious nodes to the DHT network, the paper makes analysis about the DHT routing algorithm, we get the iteration function of routing on DHT. Through the analysis on iterative routing functions, we summarize the common features of malicious nodes which undermine the convergence of the DHT routing, so we design a security routing model based on convergence detected about route in DHT, which was be named SDRM. Then we design a security routing algorithm CSDSR, according to SDRM and chord. In the end, we carry out simulations to test the performance of CSDSR. © 2011 IEEE.

Wu W.,Zhou Kou Normal University | Xuan Y.,Zhou Kou Normal University | Yin J.L.,Zhou Kou Normal University | Shujie L.,Luminescent
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2014

A Schiff base compound (H2L) was synthesized using o-vanillin and o-phenylenediamine, and then the zinc Schiff base complex was obtained by the reaction of zinc acetate. They were characterized by elemental analysis, the infrared spectroscopy (IR), thermogravimetric analysis (TG), fluorescence spectrometer (PL), and antioxidative activity. For Zn(II) complex, fluorescence spectrum shows that excitation of solid sample at 380 nm produces a strong emission with the peak maximum at 596 nm, the ligands display their characteristic emission peaks at 550 nm. The results illustrate that the complex and the ligand inhibition rate were up to 42.55%, 37.27%, respectively, when the concentrations were 10 mg mL-1. © 2014 Copyright Taylor and Francis Group, LLC.

Wen W.,Zhou Kou Normal University | Jimin X.,Zhou Kou Normal University | Dongpo X.,Zhou Kou Normal University
Russian Journal of Inorganic Chemistry | Year: 2010

Two copper (imidazole) complexes, namely, [Cu(im)6]Cl 2 · 4H2O (1), and [Cu(im)6]Cl 2 · 2H2O (2) (im-imidazole) have been synthesized by hydrothermal method. Single-crystal X-ray analysis revealed that the complex 1 belongs to triclinic system, space group Pl̄ with a = 8.8097(18) Å, b = 9.0812(18) Å, c = 10.586(2) Å; α = 75.08(3)°, β = 83.14(2)°, γ = 61.84(3)°; R1 = 0.0562, wR2 = 0.1607. In compound 1, [Cu(im)6]2+ cation and counter anions Cl-alternatively array in an ABAB fashion via N- H···Cl hydrogen bonding. Compound 2 falls into monoclinic system, space group P21/n with a = 8.073(2) Å, b = 13.239(2) Å, c = 15.0810(10) Å; β = 97.940(10)°; R1 = 0.0434, wR2 = 0.1243. The equatorial ligands are involved into a complex hydrogen bond network that involves the chloride anions and uncoordinated water molecules. We report there synthesis, crystal structure, thermal stability, IR spectrum and fluorescent property. © Pleiades Publishing, Ltd., 2010.

PubMed | Zhou Kou Normal University
Type: Journal Article | Journal: Acta crystallographica. Section E, Structure reports online | Year: 2011

In the title compound, [Ni(C(8)H(5)O(4))(2)(H(2)O)(2)], the Ni(II) atom lies on an inversion centre and exhibits a square-planar geometry incorporating two phthalate and two water O atoms. The nickel complex is stabilized by intra-molecular inter-actions involving water O atoms and H atoms of the phthalate groups. It forms one-dimensional zigzag chains along the b axis which are held together via - stacking inter-actions (3.647) between the benzene rings of the phthalate groups. The adjacent chains are also hydrogen bonded, resulting in a three-dimensional supra-molecular network.

PubMed | Zhou Kou Normal University
Type: Journal Article | Journal: Acta crystallographica. Section E, Structure reports online | Year: 2011

The title compound, [Cu(H(2)O)(6)]Cl(2)2C(6)H(12)N(4)4H(2)O, was prepared under mild hydro-thermal conditions. The asymmetric unit consists of one half of the [Cu(H(2)O)(6)](2+) cation, a hexa-methyl-enetetra-mine mol-ecule, two solvent water mol-ecules and a chloride ion. The formula unit is generated by crystallographic inversion symmetry. The Cu atom lies on a crystallographic inversion centre. It is in a slightly distorted octa-hedral coordination environment. In the crystal structure, inter-molecular O-HO, O-HN and O-HCl hydrogen bonds link the components into a three-dimensional network.

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