Subjects: Physics >> Nuclear Physics submitted time 2023-06-18 Cooperative journals: 《Nuclear Science and Techniques》
JIN Xiao-Ming
YANG Shan-Chao
LI Da
ZHANG Wen-Shou
WANG Chen-Hui
LI Rui-Bin
WANG Gui-Zhen
BAI Xiao-Yan
QI Chao
LIU Yan
Abstract： A simulation approach is developed to obtain the linear energy transfer (LET) spectrum of all secondary ions and predict single event upset (SEU) occurrence induced by neutron in memory devices. Neutron reaction channels, secondary ion species and energy ranges, and LET calculation method are introduced respectively. Experimental results of neutron induced SEU effects on static random access memory (SRAM) and programmable read only memory (EEPROM) are presented to confirm the validity of the simulation results.
Subjects: Chemistry >> Physical Chemistry submitted time 2017-11-05 Cooperative journals: 《结构化学》
Abstract： Two metal-organic frameworks [(Zn0.5L)·(H2O)]n (1) and [(Ni0.5L)·(H2O)]n (2) constructed by the 3-formyl-4-(pyridin-4-yl) benzoic acid ligand (HL) were synthesized and characterized by single-crystal X-ray diffraction. 1 crystallizes in orthorhombic space group Pnna with a = 16.6152(8), b = 12.6825(6), c = 15.3908(8) Å, V = 3243.2(3) Å3, Z = 4, Mr = 511.12, Dc = 1.047 g/cm3, F(000) = 1048, μ = 1.144 mm-1, GOOF = 1.061, the final R = 0.0471 and wR = 0.1262 for 12168 observed reflections with I > 2σ(I). 2 is isostructural to 1, which also crystallizes in orthorhombic space group Pnna with a = 16.6152(8), b = 12.6825(6), c = 15.3908(8) Å, V = 3243.2(3) Å3, Z = 4, Mr = 511.12, Dc = 1.047 g/cm3, F(000) = 1048, μ = 1.144 mm-1, GOOF = 1.061, the final R = 0.0471 and wR = 0.1262 for 12168 observed reflections with I > 2σ(I). Additionally, thermogravimetric analysis, FT-IR spectroscopy and powder X-ray diffraction were discussed.
Subjects: Chemistry >> Physical Chemistry submitted time 2017-11-05 Cooperative journals: 《结构化学》
Abstract： A homochrial manganese(III) complex (1) derived from chiral salen ligand (1R,2R)-(-)-1,2-diphenylethane-1,2-diamine-N,N΄-bicarboxyl-salicylidene) has been synthesized through solvothermal procedure and characterized by IR, elemental analysis, TGA, circular dichroism (CD), powder and single-crystal X-ray crystallography. It crystallizes in orthorhombic, space group P212121 with a = 9.108(3), b = 16.431(5), c = 26.531(6) Å, V = 3970.4(19) Å3, Z = 4, Dc = 1.248 g/cm3, F(000) = 1568, Mr = 745.73, μ = 0.383 mm-1, the final GOOF = 0.957, R = 0.0631 and wR = 0.1079 for 13250 observed reflections with I > 2σ(I). The coordination polymer 1 possesses a 1D infinite zigzag chain architecture constructed by the dicarboxyl-functionalized metallosalen ligand (Mn-salen), and the polymeric chains are further assembled into a 3D supramolecular network structure via strong intermolecular hydrogen bonding interactions between adjacent zigzag chains. As a heterogeneous catalyst, 1 was used as an efficient heterogeneous catalyst for the asymmetric olefin epoxidation.
Subjects: Chemistry >> Physical Chemistry submitted time 2017-11-05 Cooperative journals: 《结构化学》
Abstract： A novel indium-based chiral metal organic-framework 1 {In2L(μ2-O)(H2O)3}n was synthesized from C2-symmetric 1,1΄-biphenol-based ligand H4L and structurally characterized by single-crystal and powder X-ray diffraction, Fourier-transform infrared spectra (FTIR), solid-state circular dichroism (CD) and thermal gravimetric analysis (TGA). 1 crystallizes in monoclinic space group P21 with a = 10.1861(5), b = 18.5632(9), c = 16.5153(8) Å, V = 3077.1(3) Å3, Z = 2, Mr = 944.29 g/mol, Dc = 1.019 g/cm3, F(000) = 944, GOOF = 0.932, the final R = 0.0577 and wR = 0.1091 for 22090 observed reflections with I > 2σ(I). Each In2 cluster in 1 is linked by four ligands and each ligand is coordinated to four In2 clusters to generate a 3D network. Additionally, the photoluminescence of 1 and H4L were also investigated.
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