Two large-pore metal-doped aluminophosphates, Mn4Al5（PO4 ）12[N（ C2H4NH3）3]3 [ N（C2H4NH3）2·（C2H4NH2）]（NH4）2·14H=O（Mn4-NJU） and Co4Al5（PO4）12[N（C2H,NH3）3][N（C2H4NH3）2（C2H4NH2）]3· （ N...Two large-pore metal-doped aluminophosphates, Mn4Al5（PO4 ）12[N（ C2H4NH3）3]3 [ N（C2H4NH3）2·（C2H4NH2）]（NH4）2·14H=O（Mn4-NJU） and Co4Al5（PO4）12[N（C2H,NH3）3][N（C2H4NH3）2（C2H4NH2）]3· （ NH4 ）4· 13H2O （ Co4-NJU） , which have the same open framework structures, were hydrothermally synthesized. The structures of these compounds consist of TO4 tetrahedra, which are linked together by corner-sharing to form an open framework with unique intersecting twelve-membered ring channels in three dimensions. The compounds crystallize in cubic space group I（-4）3m with α= 1. 6795（2） nm and V=4. 7374（9） nm^3 for Mn4-NJU, and a=1. 67372（19） nm and V = 4. 6887 （9） nm^3 for Co4-NJU, respectively. Single crystal structure analyses show that the protruding O atoms of the frameworks of the compounds are linked to protonated 4-（ 2-aminoethyl ）diethylenetriamine （TREN, C6H18N4 ） ions in the windows by means of hydrogen-bonding under the hydrothermal condition. It is also found that the components inside the super cages of the compounds are changeable, and the metal ions M^2＋ （M = Mn, Co） and Al^3＋ disorderedly occupy the same crystallographic positions.展开更多
The new self-assembly tripodal hexadentate Schiff base compound, C27H30N4O3, derived from tris（2-aminoethyl）amine（tren） with salicylaldehyde and its manganese（Ⅲ） complex [（C27H27N403）Mn].CH3OH（1） were desig...The new self-assembly tripodal hexadentate Schiff base compound, C27H30N4O3, derived from tris（2-aminoethyl）amine（tren） with salicylaldehyde and its manganese（Ⅲ） complex [（C27H27N403）Mn].CH3OH（1） were designed and synthesized by original self-assembly reaction at room temperature in the solution of methanol. Both the compounds were characterized by elemental analysis, IR spectrometry, UV-Vis spectroscopy and X-ray single crystal diffraction. It is noteworthy that the tripodal hexadentate Schiff base ligand effectively encapsulates the manganese（Ⅲ） ion and enforces a six-coordinate geometry in complex 1 with the apical nitrogen atom of tren-Schiff base remaining unbound to the metal. It is found that there are several intra-molecular hydrogen bonds in them（C-H…O and O-H…N）. In addition, quantum chemistry calculations were also performed and discussed in detail. These results are consistent with the structural analyses of them.展开更多
Since September 2006,in order to Control the export of products high in energy consumption, causing high pollution and with high intensity of resources and encourage the import of raw materials,the import and export p...Since September 2006,in order to Control the export of products high in energy consumption, causing high pollution and with high intensity of resources and encourage the import of raw materials,the import and export policies展开更多
The complex [Cd(tren)(meim)](ClO4)2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in monoclinic system, space group P21/m with a=0.786 8(2)...The complex [Cd(tren)(meim)](ClO4)2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in monoclinic system, space group P21/m with a=0.786 8(2) nm, b=0.834 2(2) nm, c=1.496 2(4) nm, Mr=538.64, Z=2, F(000)=542, Dc=1.822 g·cm-3, T=298(2) K, μ=1.435 mm-1 and λ=0.071 073 nm. The structure was refined to R=0.045 8 and wR=0.123 1 for 1 489 observed reflections with I>2σ(I). The complex was valued for its antimicrobial activity against bacterial strands using the agar diffusion method. It was found to be active against the four test bacterial organisms. CCDC: 600198.展开更多
The application of ti me-series modeling and forecasting method to the spectral analysis for lubricat ing oil of mechanical equipment is discussed. The AR model is used to perform a time-series modeling and forecasti...The application of ti me-series modeling and forecasting method to the spectral analysis for lubricat ing oil of mechanical equipment is discussed. The AR model is used to perform a time-series modeling and forecasting analysis for the spectral analysis data co llected from aero-engines. In the oil condition monitoring field of mechanical equipment, the use of the method of time-series analysis has rarely been report ed. As indicated in the satisfactory example, a practical method for condition m onitoring and fault forecasting of mechanical equipment has been achieved.展开更多
文摘Two large-pore metal-doped aluminophosphates, Mn4Al5（PO4 ）12[N（ C2H4NH3）3]3 [ N（C2H4NH3）2·（C2H4NH2）]（NH4）2·14H=O（Mn4-NJU） and Co4Al5（PO4）12[N（C2H,NH3）3][N（C2H4NH3）2（C2H4NH2）]3· （ NH4 ）4· 13H2O （ Co4-NJU） , which have the same open framework structures, were hydrothermally synthesized. The structures of these compounds consist of TO4 tetrahedra, which are linked together by corner-sharing to form an open framework with unique intersecting twelve-membered ring channels in three dimensions. The compounds crystallize in cubic space group I（-4）3m with α= 1. 6795（2） nm and V=4. 7374（9） nm^3 for Mn4-NJU, and a=1. 67372（19） nm and V = 4. 6887 （9） nm^3 for Co4-NJU, respectively. Single crystal structure analyses show that the protruding O atoms of the frameworks of the compounds are linked to protonated 4-（ 2-aminoethyl ）diethylenetriamine （TREN, C6H18N4 ） ions in the windows by means of hydrogen-bonding under the hydrothermal condition. It is also found that the components inside the super cages of the compounds are changeable, and the metal ions M^2＋ （M = Mn, Co） and Al^3＋ disorderedly occupy the same crystallographic positions.
基金Supported by the National Natural Science Foundation of China(No.20771051)the Education Foundation of Liaoning Province, China(No.2007T093)
文摘The new self-assembly tripodal hexadentate Schiff base compound, C27H30N4O3, derived from tris（2-aminoethyl）amine（tren） with salicylaldehyde and its manganese（Ⅲ） complex [（C27H27N403）Mn].CH3OH（1） were designed and synthesized by original self-assembly reaction at room temperature in the solution of methanol. Both the compounds were characterized by elemental analysis, IR spectrometry, UV-Vis spectroscopy and X-ray single crystal diffraction. It is noteworthy that the tripodal hexadentate Schiff base ligand effectively encapsulates the manganese（Ⅲ） ion and enforces a six-coordinate geometry in complex 1 with the apical nitrogen atom of tren-Schiff base remaining unbound to the metal. It is found that there are several intra-molecular hydrogen bonds in them（C-H…O and O-H…N）. In addition, quantum chemistry calculations were also performed and discussed in detail. These results are consistent with the structural analyses of them.
文摘Since September 2006,in order to Control the export of products high in energy consumption, causing high pollution and with high intensity of resources and encourage the import of raw materials,the import and export policies
文摘The complex [Cd(tren)(meim)](ClO4)2 was synthesized and characterized by elemental analysis, IR and X-ray single-crystal diffraction. The compound crystallizes in monoclinic system, space group P21/m with a=0.786 8(2) nm, b=0.834 2(2) nm, c=1.496 2(4) nm, Mr=538.64, Z=2, F(000)=542, Dc=1.822 g·cm-3, T=298(2) K, μ=1.435 mm-1 and λ=0.071 073 nm. The structure was refined to R=0.045 8 and wR=0.123 1 for 1 489 observed reflections with I>2σ(I). The complex was valued for its antimicrobial activity against bacterial strands using the agar diffusion method. It was found to be active against the four test bacterial organisms. CCDC: 600198.
文摘The application of ti me-series modeling and forecasting method to the spectral analysis for lubricat ing oil of mechanical equipment is discussed. The AR model is used to perform a time-series modeling and forecasting analysis for the spectral analysis data co llected from aero-engines. In the oil condition monitoring field of mechanical equipment, the use of the method of time-series analysis has rarely been report ed. As indicated in the satisfactory example, a practical method for condition m onitoring and fault forecasting of mechanical equipment has been achieved.
