Two novel energetic coordination compounds Zn-2(DAT)(5)(H2O)(3)(TNR)(2) and Co-2(DAT)(5)(H2O)(3)(TNR)(2) were synthesized and their structures were characterized by elemental analysis and FT-IR spectroscopy. The crystal structures were determined by single-crystal X-ray diffraction. The results reveal that the compounds have similar molecular structures and the crystals belong to the triclinic system, space group P (1) over bar with a = 11.491(3), b = 13.564(3), c = 15.496(3) angstrom, V = 2180.4(8) angstrom(3). C17H28 Zn2N36O19. M-r = 1203.02 g.mol(-1), D-c = 1.832 g.cm(-3), mu(MoK alpha) = 1.221 mm(-1), F(000) = 1223, Z = 2, R = 0.0596 and wR = 0.1514 for 11289 observed reflections (I > 2 sigma(I)) for Zn-2(DAT)(5)(H2O)(3)(TNR)(2) and a = 11.5291(13), b = 13.4894(15), c = 15.4852(17) angstrom, V = 2164.8(4) angstrom(3), C17H28Co2N36O19, M-r = 1190.14 g.mol(-1), D-c = 1.826 g.cm(-3), mu(MoK alpha) = 0.888 mm(-1), F(000) = 1211, Z = 2, R = 0.0576 and wR = 0.1431 for 11218 observed reflections (I > 2 sigma(I)) for Co-2(DAT)(5)(H2O)(3)(TNR)(2), respectively. The thermal decomposition characteristics of the compounds were investigated using differential scanning calorimetry and thermal gravimetry-differrential thermal gravimetry. The results of thermal decomposition processes were similar for the two compounds. Both undergo four-step decomposition after the loss of coordinated H2O molecules. The final solid residues for the two DAT complexes were the corresponding metal oxides. The kinetic parameter of the first exothermic process of the compounds was studied by applying the Kissinger and Ozawa-Doyle methods. The thermodynamic parameters of the activation could be calculated. Sensitivity tests revealed that Co-2(DAT)(5)(H2O)(3)(TNR)(2) was more sensitive than Zn-2(DAT)(5)(H2O)(3)(FNR)(2).
Colloidal CdSe@CdS core-shell quantum dots (QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO2 layer for QD-sensitized solar cells. The sensitized films were prepared by alternating the layer-by-layer deposition of water-soluble semiconductor QDs and polycations over mesoscopic TiO2 films. The multilayer build-up, monitored by UV-vis spectroscopy shows an increase in the film absorbance with the number of adsorbed CdSe@CdS layers. The photoluminescence (PL) and photoelectrochemical properties of the multilayers were investigated. The photovoltaic performance of QD-sensitized solar cells is strongly dependent on the film structure and component. The incorporation of the electron mediators of [Co(Phen)3]2+ during the deposition process remarkably enhanced the photocurrent intensity in comparison to that in case of QD/polyelectrolyte multilayers.
A novel energetic coordination compound [Co(DAT)(6)](ClO4)(2) has been synthesized by using 1,5-diaminotetrazole (DAT) as a ligand and its structure has been characterized using X-ray single crystal diffraction, elemental analysis and FT-IR spectroscopy. The central cobalt(II) cation is coordinated by six N atoms from six DAT molecules to form a six-coordinated and distorted octahedral structure. Di-dimension layer structure was formed by the extensive intermolecular hydrogen bonds between DAT ligands and ClO4- anions along a-axis and b-axis. Thermal decomposition mechanism of [Co(DAT)(6)](ClO4)(2) was investigated based on differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) spectra. The kinetic parameters of the first exothermic process were studied by applying the Kissinger's and Ozawa-Doyle's methods. Additionally, the sensitivities of this complex were tested. The results of all the studies show that [Co(DAT)(6)](ClO4)(2) has an extreme potential application as an energetic material.
An environmentally friendly energetic coordination compound [Zn(DAT)(6)](ClO4)(2) (DAT=1,5-diaminotetrazole) has been synthesized by using DAT as ligand, characterized by elemental analysis and FT-IR spectroscopy. The single crystal structure of the title compound was determined by applying X-ray single crystal diffraction, which shows that the crystal belongs to trigonal crystal system with space group P (3) over bar, and its crystal parameters: a=b=1.18398(9) nm, c=0.65700(10) nm, gamma= 120 degrees, V=0.79760(15) nm(3), and Z=1. There are one Zn2+, six DAT molecules and two ClO4- in the minimum asymmetric unit of the title compound. The central zinc(II) cation is coordinated by six N atoms from six DAT molecules to form a six-coordinated and distorted octahedral structure. Thermal decomposition mechanism of [Zn(DAT)(6)](ClO4)(2) was predicted based on DSC, TG-DTG and FT-IR analysis results. Also the kinetic parameters of the first exothermic process and sensitivities of the title compound have been studied. The result shows that the title compound has good friction sensitivity.
A novel energetic coordination complex of [Mn (AZT)(2) (H2O)(4)] (HTNR)(2)center dot 4H(2)O (AZT=3-azido-1,2,4- triazole, HTNR=2,4,6-trinitro resorcinol) was prepared by the reaction between the acidic manganese (II) salt of 2,4,6-trinitro resorcinol and AZT in an aqueous solution. The complex was characterized by elemental analysis and FTIR spectroscopy. The molecular structure was determined by X-ray single crystal diffraction. The crystal belongs to the triclinic system with a P (1) over bar space group. The central manganese(II) cation has a slightly distorted octahedron feature. Three-dimension networks were formed and the layers are linked by extensive hydrogen bonding. The thermal decomposition mechanism of [Mn(AZT)(2)(H2O)(4)](HTNR)(2)center dot 4H(2)O was predicted based on differential scanning calorimetry (DSC) and thermogravimetry-derivative thermogravimetry (TG-DTG) analyses. One endothermic peak and three exothermic peaks are present during the thermal decomposition process with the final residue at 600 degrees C being MnO and MnO2. The kinetic parameters of the exothermic process for the complex were studied using Kissinger's and Ozawa-Doyle's methods. Furthermore, impact sensitivity, flame sensitivity, and friction sensitivity tests reveal that the title complex is sensitive and selective towards external stimulants.
The progress in the salts and complexes of 1,5-diamino-1H-tetrazole(DAT) were described and reviewed.The optimized synthesis processes were emphasized with the precursor of diaminoguanidine chloride as raw materials.The DAT can easily forms salt resulting from reacting with strong acid,and easily forms six energetic complexes resulting from coordinating in six DAT molecules with perchlorate.All of these DAT compounds are sensitive to mechanic stimulus,and possess good explosive properties.Therefore,DAT compounds have potential applications in the high energy density materials.
A new energetic coordination compound [Mn(DAT)(6)] (ClO4)(2) (DAT = 1,5-diaminotetrazole) was synthesized by DAT and manganese perchlorate and characterized by elemental analysis, differential scanning calorimetry, thermogravimetry-differential thermogravimetry, and X-ray single crystal diffraction method. The crystal belongs to trigonal system and its crystal structure data are as follows: a = b = 1.18435 (17) nm, c = 1.3081 (3) nm, alpha = beta = 90 degrees, gamma = 120 degrees, V = 1589.1 (5) nm(3), Z = 2. The molecule of the title compound contains one Mn2+ cation, six DAT molecules and two ClO4- anions. The central manganese(II) cation is coordinated by six N atoms from six DAT molecules to form a six-coordinated and distorted octahedral structure. In addition, the sensitivity properties of the title compound were studied. The result shows that the title compound has good sensitivity.
Two new coordination compounds [Cu(ethylenediamine)2(nitroformate)2] and [Cd(ethylenediamine)3](nitroformate)2 were synthesized and characterized through elemental analysis, IR and UV spectra. Their crystal structures were determined through X-ray single crystal diffraction. The first compound crystallizes in the triclinic space group P1¯; the second one crystallizes in the orthorhombic space group Pbca. For the first compound, central Cu(II) ion is hexa-coordinated with two ethylenediamine ligand molecules and two nitroformate anions to form the centrosymmetric octahedral structure. For the second one, central Cd(II) ion is hexa-coordinated with three ethylenediamine ligand molecules to form the slightly distorted octahedra. Through hydrogen bonds, molecules are linked together to form the three-dimensional packing diagrams. Thermal decomposition mechanisms of these two compounds were predicted through DSC, TG–DTG and FTIR analyses. In addition, the impact sensitivity, friction sensitivity and flame sensitivity were measured. All observed properties show that the first one has high energy, good thermal stability and moderate flame sensitivity.
It’s important for SINS to determine initial azimuth angle and attitude angle of the carrirer accurately and quickly as we have known, gyroscope drift is a main problem in this procedure. Therefore, how to eliminate the gyros drift Rate effectively is the key to guarantee the north- seeker accuracy. This paper introduces a method of de-noising by multiwavelet for SINS, and compare it’ s result to the Db4 scalar wavelet. With the results of numerical simulations, this method is good enough to satisfy the reqirements and with the feasibility and advantage.
介绍了一种新的基于NIOS Ⅱ的导航系统的设计方案.NIOS是建立在FPGA上的嵌入式微处理器软核,由于它硬件设计上的灵活性和可裁减性,使得软件设计上"平台"的概念延伸到硬件设计中.本文就是把NIOS Ⅱ硬件平台的方案,在导航系统计算机设计上进行了有益尝试,实践证明,本设计不但实现了预期功能,而且为以后在其他导航产品上快速的移植硬件和软件系统,提供了有力保证.
介绍了陀螺数字PID温度控制方法以及陀螺仪温度试验系统的结构和特点,用该系统进行了某型陀螺仪的温度速率试验与位置试验.在试验数据的基础上,用线性回归算法建立了陀螺仪的静态温度模型.线性回归法算法简单,已用于实际工程中.
介绍基于RISC技术的32位微处理器LPC2214,在寻北仪器,计算机控制模块的硬件实现.整体设计基于前后台的设计思想,本文较详细的介绍了系统的主要电路控制模块的设计方法.针对寻北仪的特点,介绍了在系统开发中所用的抗干扰方法和手段.
This article provides some improvement on the software of an inertial north-seeker test system.By vritue of visual instrument technique,software based on Lab VIEW IDE has been designed to fulfill the desired function of north- seeker test system.
This paper introduced fundamental of serial communication in detail and method using MFC to implement COM communication under Windows operating system.In the same time,it also gave an MFC implement of data communication application about Northfinder's PC which is compled by visual C~(++) 6.0 computer incorporating actual project.
This paper analyzes errors of gyro and accelerator in northfinder and presents a method of dealing with datas-Information Square Root Filter. It avoids destroying the positive definiteness essential to a covariance matrix and lead to the unstability of numerical calculation in Kalman filter(KF). The result of test proves that information square root filter can improve accuracy of Northfinder andsatisfies demand of northfinder's accuracy.
The principal assembly factors that influenced K0 and K1 drift coefficient of air static pressure single-degree-of-freedom gyro are analyzed and quantized based on the gyro principle as well as the numerous experiment results. Some technology steps of controlling K0 and K1 drift coefficient accuracy are presented.