共查询到20条相似文献,搜索用时 19 毫秒
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以CuCl2·2H2O、ZnCl2·6H2O、MgCl2·6H2O、AlCl3·6H2O、Na2CO3为原料,采用丙三醇-水热法组装了优质铜-锌-镁-铝类水滑石.样品采用XRD、SEM、TEM、TG-DAT、N2吸附-解吸的分析方法进行了物相、粒度、晶体形貌结构、热分析和比表面分析.分析了不同介质条件对Cu-Zn-Mg-Al-HTlc类水滑石样品特征的影响.结果发现,在水热反应体系中加入体积分数为15;的丙三醇,反应温度为180 ℃,反应时间为18 h时可获得晶形好、板层结构显著、规整性好、分散性好的优质铜锌铁镁铝水滑石,估算薄层厚度约在36 nm左右. 相似文献
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Crystallography Reports - A semi-rigid chiral coordination polymer, {Cd3(4-cpta)2(dpp)2(H2O)}n (1), was synthesized solvothermally with 4-H3cpta (4-H3cpta = 3-(4'-carboxyphenoxy)phthalic acid),... 相似文献
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以高纯I2(5N)和In(7N)为原料,采用两温区气相输运法制备了InI多晶料,研究了高纯InI多晶合成工艺.用X射线粉末衍射(XRD)方法对合成的InI多晶进行结构测定,用扫描电子显微镜-X射线能量色散谱仪(SEM-EDS)对其成分进行分析,用等离子体原子发射光谱仪(ICP-AES)对其组成的元素进行痕量测定.研究结果表明:合成的InI多晶料晶格结构完整,纯度高,晶格参数为a=0.476 nm,b=1.278 nm,c =0.491 nm,且碘和铟比例接近1∶1. 相似文献
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Metal(II) complexes M(aas)2 [M = Mn. Co, Ni, Cu and Zn, Haas = 2-aminoacetophenonesalicylaldazine] have been prepared and characterized. Magnetic and spectral data such as electronic, ESR, and IR are used to establish the stereochemistry and mode of bonding of azine in the complexes. X-ray diffraction study suggests orthorhombic unit lattice for Co(aas)2, Ni(aas)2, Cu(aas)2 and Zn(aas)2 complexes. 相似文献
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Tomoko Kusawake Yasuhiko Takahashi Ken-Ichi Ohshima 《Molecular Crystals and Liquid Crystals》2013,570(2):93-98
Abstract A structural analysis of single crystals of the layered compounds Cu x TiS2 (x=0. 0.21 and 0.38), which were prepared by the iodine transport and the electrochemical methods, has been performed by X-ray diffraction. The displacement parameters of Ti and S atoms along the c axis are larger than those along the a axis. It is understood that the intra-layer bonding between Ti-Ti and S-S atoms is stronger than the inter-layer bonding between Ti-and S-layers. Both distances between Ti-and S-layers and between Cu-and S-layers are enlarged without changing the structure of the mother phase after intercalating Cu atoms. 相似文献
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Aliakbar Dehno Khalaji Karla Fejfarova Michal Dusek 《Journal of chemical crystallography》2012,42(3):263-266
Abstract
New Schiff base compound bis[(2,3,4-trimethoxy-benzylidenepropylideneamino)phenyl]-ether (1) was synthesized and characterized by elemental analyses (CHN), FT-IR and 1H-NMR spectroscopy and single-crystal X-ray diffraction. The title compound 1 crystallizes in triclinic system, space group P-1, with a = 6.8255(4) Å, b = 10.4346(4) Å, c = 19.4166(8) Å, α = 86.588(3)°, β = 85.019(4)°, γ = 89.042(4)°, V = 1375.12(11) Å3 and Z = 2. It displays a trans configuration about the C=N double bonds. 相似文献11.
Xiao-liu Li Xiao-li Zhen Jian-rong Han Shouxin Liu 《Journal of chemical crystallography》2009,39(12):870-873
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As precursors of α-amino acids, methyl 2-hydroxyimino-3-phenyl-propionate (F.W. 193.20) was synthesized, characterized by 1H NMR, IR, element analysis and confirmed by X-ray crystal structure analysis. This compound crystallizes in monoclinic class under the space group P21/c with cell parameters, a = 8.6435(17) Å, b = 5.4957(11) Å, c = 21.146(4) Å; β = 97.12(3)°, and Z = 4. The structure exhibits inter-molecular hydrogen bonds of the type O–H···N, O–H···O, C–H···O. 相似文献12.
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Parry Christopher S. Grossmann Matthew D. Thomas Amy Majireck Max M. Reinheimer Eric W. Kriley Charles E. 《Journal of chemical crystallography》2022,52(1):122-129
Journal of Chemical Crystallography - Herein we present the synthesis, structure and NMR and mass spectroscopic analyses of the antioxidant 2-(3,5-dimethoxyphenyl)-2,3-dihydroquinolin-4(1H)-one... 相似文献
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L. P. Battaglia A. Bonamartini Corradi G. Pelosi P. Tarasconi 《Journal of chemical crystallography》1989,19(1):93-98
In this paper the crystal and molecular structure of the title compound is reported. The crystals are monoclinic, P21/c,Z=4,a=13.406(4),b=5.367(1),c=15.545(6)Å,=110.00(5)°. The structure was solved by direct and Fourier methods and refined by full-matrix least squares toR=0.0497 andRw=0.0537 for 1094 unique reflections. The molecule shows an E-conflguration with respect to the C=N double bond. Mass and IR spectra are also discussed. 相似文献
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Devipriya Balu Kumaradhas Poomani Kalyanam Nagabushanam Sridhar Balasubramanium Rajendran Ramanujam Majeed Muhammed 《Journal of chemical crystallography》2011,41(5):697-702
Abstract
5-Lipoxygenase inhibitor 3-O-acetyl-9,11-dehydro-β-boswellic acid was detected in the extract of Boswellia serrata gum resulting from unstable 11-hydroxy precursor. It was reported more potent than other Boswellic acids in its inhibition of 5-Lipoxygenase. Here, we report the method of conversion of 3-acetoxy-β-boswellic acid to 3-O-acetyl-9,11-dehydro-β-boswellic acid, and the crystal structure of later. This compound crystallizes in orthorhombic space group P212121 with cell parameters of a = 12.726(1) ?, b = 16.597(1) ?, c = 27.332(2) ?, α = β = γ = 90°, V = 5772.7(5) ?3, D c = 1.143 Mg/m3, and Z = 8. The X-ray structure investigation indicates that the rings A, B, D and E are exhibit chair and the ring C adopts a distorted half chair conformation. The conformational difference of the two structures in the arrangement is due to crystal packing of 3-O-acetyl-9,11-dehydro-β-boswellic acid. The molecular packing is stabilized by C–H···O and O–H···O types of hydrogen bonding interactions. 相似文献16.
以高纯(6N) Cd、Si、P单质为原料,按CdSiP2化学计量比并适当富磷配料,采用传统气相输运法合成出CdSiP2多晶.X射线衍射(XRD)分析及Rietveld全谱拟合精修结果表明合成产物中含有微量SiP和CdP2杂相,分析了杂相产生的原因.针对存在的问题改进合成工艺,引入高温熔体机械和温度振荡以及分步控温冷却等新工艺,获得了外观完整、内部致密均匀的CdSiP2多晶.XRD及能量色散谱仪(EDS)分析结果表明,合成产物为高纯单相CdSiP2多晶,为高质量单晶体的生长奠定了可靠基础.以改进工艺获得的CdSiP2多晶为原料生长出质量较好的单晶体,厚度为2mm的晶片样品在1500 ~ 7000 cm-1范围内的红外透过率在45;以上,计算出晶体的禁带宽度为2.09 eV. 相似文献
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Feng-Lin Hu Nan Han Jie Yu Yong-Mei Cui Wei-Guo Cao Hai-Xia Lin 《Journal of chemical crystallography》2011,41(10):1586-1592
Abstract
Three novel taxoids were synthesized from 1-deoxybaccatinVI and their crystal structures were determined by X-ray crystallographic techniques. The influence of C(7), C(10) and C(4) substituents of the tetracyclic moiety on molecular conformations were investigated. The result shows that 4-acetyl moiety plays an important role in the conformation of the diterpenoid core. All of these 1-deoxybaccatinVI derivatives crystallize in orthorhombic system, space group P212121. In the structures, the six-membered A ring exhibits the 1,4-di-planar conformation, the eight-membered B ring adopts boat–chair conformation and the six-membered C ring exhibits slightly distorted half-chair conformation. 相似文献20.