苯甲醛缩三乙烯四胺Schiff碱Co(Ⅱ)配合物固相合成及氧合性能研究

Three new cobalt complexes were synthesized by solid-state reaction at room temperature. It was found that one mole of complex reacted with two moles of oxygen at room temperature. And the oxygenated complexes [Co·(L₁)₂·2O₂](NO₃)₂·2H₂O (L₁=N,N′-bis(4-hydroxyl-3-methoxy-benzyl)-triethylenetetramine), [Co·(L₂)₂·2O₂](NO₃)₂ ·2H₂O (L₂=N,N′-bis(4-hydroxyl-benzyl)-triethylenetetramine) and [Co·L₃·2O₂](NO₃)₂·2H₂O (L₃=N,N′-bis(2-hydroxyl-benzyl)-triethylenetetramine) were obtained and characterized by elemental analysis, IR spectra, ¹H NMR, TG/DTA, UV-Vis and molar conductance. The coordinated oxygen contents in the oxygenated complex were also determined by weight method. It was found that one O₂ molecule coordinated to the Co ion and formed superoxo type oxygenated complex.     

Thermochemical Properties and Decomposition Kinetics of Ammonium Magnesium Phosphate Monohydrate

Ammonium magnesium phosphate monohydrate NH4MgPO4·H2O was prepared via solid state reaction at room temperature and characterized by XRD, FT-IR and SEM. Thermochemical study was performed by an isoperibol solution calorimeter, non-isothermal measurement was used in a multivariate non-linear regression analysis to determine the kinetic reaction parameters. The results show that the molar enthalpy of reaction above is （28.795 ± 0.182） kJ/mol （298.15 K）, and the standard molar enthalpy of formation of the title complex is （-2185.43 ± 13.80） kJ/mol （298.15 K）. Kinetics analysis shows that the second decomposition of NH4MgPO4·H2O acts as a double-step reaction： an nth-order reaction （Fn） with n=4.28, E1=147.35 kJ/mol, A1=3.63×10^13 s^-1 is followed by a second-order reaction （F2） with E2=212.71 kJ/mol, A2= 1.82 × 10^18 s^-1.     

Synthesis and Crystal Structure of a New Quinazolinone Compound 2,3-Dihydro-2-（2-hydroxyphenyl）-3-phenyl-quinazolin-4（1H）-one

A new quinazolinone compound 2,3-dihydro-2-(2-hydroxyphenyl)-3-phenylquinazolin-4(IH)-one 3 ([C2oH16O2N2]-C2H5OH, Mr = 362.42) and compound 2-(2-hydroxybenzylidene-amino)-N-phenyl-benzamide 2 (C2oH16O2N2, Mr = 316.34) were prepared from a precursor of 2-amino-N-phenyl-benzamide 1 (C13H12ON2, Mr = 212.25). Compound 3 was characterized by single-crystal X-ray diffraction analysis. The crystal belongs to orthorhombic,space group Pbca with a = 1.2889(11), b = 1.6170(14), c = 1.7729(15) nm, V= 3.695(6) nm^3, Z= 8, F(000) = 1536, Mr = 362.42, Dc = 1.303 g/cm^3, μ(MoKa) = 0.087 mm^-1, R = 0.0447 and wR= 0.0879. The crystal structure analysis indicates that the title compound has a two-dimensional network structure formed by hydrogen bonds and electrostatic interactions.     

A 2D Lanthanide-organic Framework Based on Inorganic Lanthanum（Ⅲ） Sulfate Skeletons：Synthesis,Structure,and Luminescence and Thermal Properties

A new lanthanum coordination polymer formulated as {[La2(pyda) 2(μ4-SO4) ·5H2O]· 2H2O}n(1,H2pyda = 2,6-pyridine-dicarboxylic acid) has been synthesized from the reaction of H2pyda with lanthanide nitrate in the presence of sulfate as a counter anion. The compound was characterized by elemental analysis,IR spectroscopy and X-ray single-crystal diffraction. It crystallizes in the orthorhombic system,space group Pna21,with a = 18.8558(19) ,b = 6.5831(7) and c = 18.7543(19) . The compound is a 2D hybrid,in which the La(Ⅲ) ions were doubly connected by the carboxylic group of pyda2-ligand to form the La(Ⅲ) dimer followed by being grafted into 1D zig-zag chains which are further connected into a 2D network containing {[La(SO4) ]+}n helical chains. The interchain hydrogen bonding and π-π stacking interactions extended the 2D networks into a 3D supramolecular edifice.     

Cation-π Interactions:Synthesis and Crystal Structure of Complex:[Na(DB18C6)]2[Pd(SCN)4]

The cation-π interactions have attracted much attention as an important noncovalent binding force. We have synthesized and characterized the first example[K(DB 18C6)]₂[Pd(SCN)₄] which exist K⁺-π interactions in crown ether compounds^[1]. However,the reported Na+ complexes structurally characterized by X-ray diffraction analysis have so far been limited to a few compounds. We now report the structure of complex:[Na(DB18C6)]₂[Pd(SCN)₄] which also exist Na⁺-n interactions.     

磁亚暴期间的三维空间磁层电流体系

本文利用带电粒子在磁尾中性线磁场的运动规律,讨论了磁亚暴期间的三维磁层电流体系。研究结果表明,在晨昏电场的作用下,磁尾中性线磁场中的带电粒子将产生晨昏方向与垂直方向的分离。与此同时其磁镜点也要升降,利用这个结果以及粒子的具体轨道,文中还讨论了磁亚暴期间的三维空间电流体系,并和磁扰期间电子极光与质子极光发生的地区产生的分离做了比较。     

Characterization, Crystal Structure and Initial DNA Binding Interaction of Two Cu（Ⅱ） Complexes with 4,5-Diazafluoren-9-one

Two new complexes [Cu（dafo）2（en）]（ClO4）2·2H2O （en=NH2CH2CH2NH2） 1 and [Cu（dafo）2（dap）]（ClO4）2·2H2O [dap=NH2CH2CH（CH3）NH2] 2 （dafo=4,5-diazafluoren-9-one） have been synthesized and characterized by elemental analysis, IR and UV spectra. Meanwhile, the complex 1 has been characterized by single crystal X-ray diffraction analysis. The initial DNA binding interactions of the complexes 1 and 2 have been investigated by UV spectra, emission spectra and cyclic voltammogram. Concluding the results of three methods used to measure the interaction of complexes 1 and 2 with DNA, the action mode of the two complexes with DNA is intercalation, and character of ligands and steric effect may affect the interaction of the complexes with DNA.     

Nickel(II) and Cobalt(II) Complexes with Symmetrical Four-Dentate Ligands: Crystal Structures,Characterization, and Initial DNA Binding Mechanism Research

Abstract  

Four new nickel(II) and cobalt(II) complexes of Schiff base ligands: [Ni(L)Cl₂]·2H₂O (I), [Ni(L)(H₂O)₂] (NO₃)₂ (II), [Ni(L)(H₂O)₂] (ClO₄)₂ (III), and [Co(L) (H₂O)₂] (NO₃)₂ (IV) (L = 1,3-[bis(pyridine-2-imino)]propane) have been synthesized. The four complexes have been fully characterized by elemental analysis, IR, absorption spectra, emission spectra, and single-crystal X-ray diffraction analysis. The binding of the four complexes to calf thymus DNA (CT DNA) has been investigated by absorption spectra and emission spectra. The results of the two methods indicate that the action mode of complex I with DNA is intercalative mainly, and the action mode of complexes II, III, IV with DNA cannot be concluded, it should be sustained by other experimental measurements.     

二维网状结构超分子化合物[Cu(dafo)2(H2O)2](Cl04)2的两种同分异构体的合成与表征

用4，5—二氮芴-9-酮（dafo）、邻苯二甲酸、高氯酸铜和4，5—二氯芴—9— 酮(dafo)、苯甲酸、高氯酸铜进行混和反应时分别得到亮蓝色和蓝绿色晶体，它们 的结构通过单晶X射线衍射法测定。其单晶结构表明，这两种化合物是同分异构体 ，组成都是C22H16Cl2CuN4O12。这两种化合物是通过氢键形成的具有二维网状结构 的超分子化合物，并通过元素分析、红外光谱、热分析对两种化合物进行了表征。     

二维网状结构超分子化合物[Cu(dafo)_2(H_2O)_2](ClO_4)_2的合成和晶体结构

试图用4,5-二氮芴-9-酮(dafo)、邻苯二甲酸、高氯酸铜合成二价铜的混配体超分子化合物时得到一亮蓝色棱状晶体[Cu(dafo)2(H2O)2](ClO4)2,其结构通过单晶X-射线衍射法确定。该化合物是单斜晶系,空间群为P21/n。晶胞参数:a = 7.947(3),b = 12.021(5),c = 13.190(5) 牛? = 90.000(6)埃?V = 1260.0(9) ?,Z = 2,F(000) = 670,Mr = 662.83,Dc = 1.747 g/cm3,(MoK? = 1.154 mm-1,R = 0.0455,wR = 0.1041。单晶结构分析表明该超分子化合物具有二维网状结构,该结构是通过氢键这种弱相互作用形成的。