Tag: Crystal

Abstract The Salen-copper(II) complex was synthesized by diffusion. Chemistry Online shows the structure which was characterized by single crystal X-ray diffraction. It crystallized in triclinic system,pB1spacegroup, with a=9.3441(18)Å, b=11.478(3)Å, c=12.320(3)Å, a=81.584(11)°, b=74.681(9)°, g=68.206(9), MolecularFormula: C₂₃H₁₉CuN₅O₈, M=397.86, V=1181.6(5)ų, z=2, Dc=1.56Mg/m³, R₁=0.0416, wR₂=0.1236,I>[2s/(I)]. The crystal included a mononuclear complex [Cu(H₂L)(DMF)] and a non-coordinated H₂O molecular.
Keyword diaminomaleontrile；5-carboxylsalicylaldehyde；crystal structure.

Synthesis and Crystal Structure of a New Salen-Copper (II) Complex

Li Lijun, Yang Dongjie, Gao Yansu
(College of Chemistry and Environmental Science, Hebei University, Baoding, Hebei 071002, China )

Summary diffusion were synthesized Salen- copper (Ⅱ) mononuclear complexes [a Cu (H ₂ L) (of DMF)] ^. H ₂ 0 [H _{. 4} L] = N, N’-bis (5-carboxy-salicylaldehyde) – Diaminomaleonitrile. The complexes were characterized by X-ray single crystal diffraction. The complexes belong to triclinic system, …

Abstract Kinetics’ and Thermodynamics of The Adsorption of of Ni ²⁺ Onto Chitosan-Aluminum Composite Material’s WAS Studied oxide. The Under Experimental Conditions, s Indicated Kinetic Adsorption of that of Ni ²⁺ Onto Aluminum oxide-Chitosan Composite Material’s Conforms to pseudo-SECOND-Order Equation And the apparent adsorption activation energy is 28.62 kJ/mol.In the experimental temperature, Chemistry Magazine Online and thermodynamic studies indicated that adsorption of Ni ²⁺ onto chitosan-aluminium oxide composite material conforms to Langmuir adsorption isotherm equation. Enthalpy of adsorption ( D H) value is 15.93 kJ/mol and entropy of adsorption( D S)value is 95.43J/(mol· K).Gibbs free energy ( DG) decreases with increasing temperature.
Keywords chitosan; composite material; adsorption;

Adsorption Kinetics and Thermodynamics of Ni ²⁺ on Chitosan-Aluminum Oxide Composites

MA Zhi-guang, ZHANG Fang, GENG Na, LIU Su-wen, LIU Pan
(College of Chemistry and Environmental Science, Hebei University, Baoding, Hebei 071002, China)

Abstract The kinetics and thermodynamics of Ni ²⁺ adsorption on …

Abstract In this paper diethoxy-acrylamide methoxyl thiophosphate (DAMT) was synthesized with the reaction N-hydroxymethyl acrylamide and O, O-diethyl phosphorochloridothioate catalyzed by cuprous chloride in presence of triethylamine, and the flame retarded poly (DAMT-co-acrylonitrile) was obtained though free-radically copolymerized process. The properties of copolymer were estimated by Limiting Oxygen Index (LOI) values and thermogravimetric analysis (TGA). The results showed that the LOI value of copolymer with 20 wt% percentage of DAMT coule reach 27vol%.
Keywords: Diethoxy-acrylamide methoxyl thiophosphate, Polyacrylonitrile, Flame retardants, Thermal analysis, Limiting Oxygen Index

1 INTRODUCTION
Polyacrylonitrile (PAN) is widely used in many aspects because it is easily processed into products of various shape with well flexibility and retention at break to meet the requirements of versatile and advanced applications. However, the combustion of PAN is very easy when it is ignited, which makes it difficult to be used in some ways. Thus, the flame retardant PAN is required …

Abstract Based ON The Crystal Structure of of Imatinib and tyrosine kinase Complex (the PDB ID: 2HYY)., The Active Structure and pharmacophores of Imatinib, and The Interaction BETWEEN Imatinib and The Active Site of tyrosine kinase have have been Explored It WAS found that The methylpiperazin Group In imatinib bound to the active site of tyrosine kinase weaker than other substructure, and there are no important pharmacophores, so this part structure of imatinib can be rebuilt. Further molecular design of anti-cancer drug imatinib’s analogues was carried out by De Novo Drug Design Method, 199 molecules were obtained at first, and 10 molecules with high score were screened by docking software, this research results shows that imatinib ‘s analogues with potential for effective tyrosine kinase inhibitors.
KeyWords anti-cancer drug; imatinib; analogue; De Novo drug design

Initio Molecular Design of Antitumor Drugs Imatinib Derivatives

Abstract In this paper, the structure of tyrosine …