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Yuan X.,Zhengzhou University | Zhang X.,Zhengzhou Water Supply Corporation | Zhao H.,Zhengzhou University | Liu L.,Zhengzhou University | Wu B.,Zhengzhou University
Crystal Growth and Design

An acetate-functionalized purine-containing ligand, 2-(6-oxo-6,9-dihydro- 1H-purin-1-yl) acetic acid (H2L), and its six new one-three-dimensional (1-3D) coordination polymers, [La(HL)2(NO 3)(H2O)2]n (1), [Ce(HL) 2(NO3)(H2O)2]n (2), [Pb(HL)2(H2O)2]n (3), [Cd(HL) 2(H2O)2]n (4), [Cd(L)]n (5), and [Zn(L)]n (6), were synthesized and characterized. Single-crystal X-ray diffraction analyses reveal that the architectures of complexes 1-6 are built from the metal-organic helixes of ligands H 2L. The overall structures range from the double helical chains of 1 and 2, and the 2D helical networks of 3 and 4, to the 3D coordination polymers of 5 and 6, containing 2D homochiral layers based on 1D metal-organic helixes. In those meso compounds, ligands H2L display differently anionic states, bridge modes, and especially unsymmetrical configurations with the sharp distortion between the acetate and purin in favor of constructing helical assemblies as expected. The plentiful hydrogen-bonding sites and π···π interactions originating from the bioactive purin group of ligand H2L greatly contribute to the formation of helical structures and the structural dimension, showing an intriguing ability in the supramolecular assembly. At room temperature, complexes 1-6 exhibit solid-state photoluminescences, with their emission wavelengths and intensities varying according to the central metal ions and the coordination patterns of ligand H2L. Additionally, the thermostabilities of these new complexes have been discussed in detail. In particular, 3D polymers 5 and 6 have extra high thermostabilities and stronger blue emissions, indicating potential applications in photoluminescent materials. © 2013 American Chemical Society. Source

Zhao H.,Zhengzhou University | Zhang B.-G.,U.S. Center for Disease Control and Prevention | Zhang X.-X.,Zhengzhou Water Supply Corporation | Wang S.,Zhengzhou University | Wu B.-L.,Zhengzhou University
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry

The homochiral coordination polymers of zinc(II) with D-camphoric acid (D-H2Cam) as bridges and 4′-p-tolyl-2,2′:6′,2″-terpyridine (ttpy) and 1,10-phenanthroline (phen) as accessorial terminal ligands, namely [Zn2(D-Cam)2(ttpy)2]n (I1) and [Zn2(D-Cam)2(phen)2]n (I2), have been synthesized and characterized by elemental analysis, IR, PXRD, and X-ray diffraction analysis. Both complexes have 1D homochiral coordination chains bridged by D-Cam. Interestingly, the coordination numbers of ZnII ions, the coordination modes of D-Cam, and the crystal structures in I1 and I2 vary with the accessorial ligands ttpy and phen used. Additionally, compounds I1 and I2 have stronger fluorescence and higher thermostability, indicating their potential utility in photoluminescent materials. Copyright © Taylor & Francis Group, LLC. Source

Wu W.,North China University of Water Conservancy and Electric Power | Wu W.,Zhengzhou Water Job Science and Technology Develops Ltd. | Wu X.,Zhengzhou Water Supply Corporation
ICCET 2010 - 2010 International Conference on Computer Engineering and Technology, Proceedings

A kind of long-range and centralized automatic metering reading for water meter system is designed. The function of the GPRS network meter reading and the USB centralized meter reading are accomplished by the M23 GPRS module and the C8051F340 single chip micro-controller. The system is composed of water meter, data collector, concentrator and administer computer. The data of water consumption which will be converted into pulse signals are collected by the water meter, and these pulse signals are disposed by the data collector which can use RS-485 communication with concentrator, water user's machine can be controlled when the upper instructions are received by the way of controlling the electromotion valves. The Concentrator plays an important role in data transit and bus segregation. A USB interface is set up in the concentrator in order to avoid the failure of GPRS network, and the staff can copy the datas by computer or hand-written. The administer computer can manage the user's purchase of water and control the user's machine by sending specific instructions. © 2010 IEEE. Source

Wang L.,Henan University of Technology | Li X.,CAS Zhengzhou Research Institute | Li T.,Zhengzhou Water Supply Corporation
Applied Mechanics and Materials

Arsenic is a toxic substance. It will bring detrimental effect to the health, when the arsenic content in water exceeds 10μg /L. For water containing arsenic, we use this control system to remove arsenic to ensure water quality. Arsenic removal in water production is with the characteristics such as time-varying, delay, nonlinear. The system uses a combining control strategy based on fuzzy control and conventional PID control. In the control process, the precise control and stability can be achieved by online modifying and improving the control rules. The results of experiments show that this method has rapid response, no overshoot and good robustness compared with the traditional controller. © (2012) Trans Tech Publications, Switzerland. Source

Wu D.,Zhengzhou University | Zhang X.,Zhengzhou Water Supply Corporation | Liu X.,Zhengzhou University | Niu Y.,Zhengzhou University
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry

Five supramolecular compounds (BPP)[CdI4] 1, (BPP)[HgBr 4] 2, (BPP)[Hg(SCN)Br3] 3, (BPP)[ZnBr 0.32Cl0.68(NCS)3] 4, and (BPP)[Fe(CN) 6]·2.5H2O 5 (BPP = 1,3-bis(pyridinium) propane) were synthesized and characterized by IR spectrum and X-ray crystallography. The crystal structures of 1-3 show that they all crystallize in monoclinic systems with mononuclear tetrahalidometallate structure. Compound 4 crystallizes in triclinic system, space group P-1 in which three SCN- ions serve as bridging ligands to link one Zn(II) ions, giving rise to a approximate tetrahedron. Compound 5 crystallized in a monoclinic system and the Fe 2+ center resided in a slightly distorted octahedral environment and was six-coordinated by six SCN- ions. Copyright © Taylor & Francis Group, LLC 2013. Source

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