Er(ONO)(C8H7O3)2(H2O)3配合物的合成、表征及热分解动力学机理研究

合成了亚硝酸根·二(4-羟基-3-甲氧基-苯甲醛)·三水合铒(Ⅲ)配合物Er(ONO)(C8H7O3)2(H2O)3,用元素分析、红外光谱、摩尔电导、热重分析等手段进行表征.配合物的中心金属离子Er(Ⅲ)与2个香兰素配体中的2个酚羟基氧和2个甲氧基氧、亚硝酸根中的1个氧及3个配位水分子中的3个氧原子发生配位,配位数为8.用热重法研究了配合物的热分解动力学机理.     

稀土异双希夫碱配合物的合成、表征及热分解反应动力学

邻苯二胺与 5 氯 2 羟基二苯酮、水杨醛作用合成了一种异双四齿希夫碱配体C2 6 H1 9N2 O2 (H2 L)。在正丁醇和甲醇体系中稀土硝酸盐与该配体反应合成了 3种稀土希夫碱配合物 [RE(HL) (NO3) 2 (H2 O) ]·H2 O(RE =La ,Pr,Nd)。通过元素分析 ,IR ,UV ,TG DTG及摩尔电导分析等手段对合成的配合物进行了表征 ,并用非等温热重法研究了La(Ⅲ )配合物的热分解反应动力学。推断出第三步热分解反应动力学方程为 :dα/dt=A·e-E/RT·3 / 2 [( 1-α) - 1 /3-1] - 1 。     

用DSC法研究配合物[Sm(m-BrBA)3phen]2·2H2O脱水反应的动力学

合成了稀土配合物[Sm（m-BrBA）3phen]2.2H2O（m-BrBA,间溴苯甲酸;phen,邻菲罗啉）。用差示扫描量热（DSC）技术研究了该配合物脱水反应的动力学方程和动力学参数。实验数据用双等双步法处理,得到脱水反应的动力学方程为dα/dt=Aexp（-E/RT）2（1-α）[-ln（1-α）]1/2。表观活化能E为237.26kJ·mol^1,指前因子A为4.40×1018/min-1,分别获得了脱水过程的热力学参数ΔH≠,ΔG≠和ΔS≠的值。     

对硝基苯甲酸铕与2,2‘—联吡啶配合物的合成及热分解的研究

在乙醇溶液中合成了一种新的铕（Ⅲ）的三元配合物，通过元素分析、红外光谱分析对其进行了表征。采用ＴＧ－ＤＴＧ技术对其热分解过程进行了研究，并用三种非等温积分方程计算了动力学参数。     

糠醛缩丙氨酸合Dy(Ⅲ)配合物的合成、表征及热分解反应动力学

合成了糠醛缩丙氨酸合Dy配合物,通过元素分析、红外光谱、紫外光谱、摩尔电导和热重分析,研究了配合物的组成和热分解反应机理。     

氟哌酸钕的合成及其热分解非等温动力学研究

合成了钕（Ⅲ）的氟哌酸配合物〔Ｎｄ（ＮＦＡ）３·６Ｈ２Ｏ〕，对其进行了热分解非等温动力学研究。通过元素分析，红外光谱对其性质进行了表征。运用Ａｃｈａｒ法和Ｃｏａｔｓ－Ｒｅｄｆｅｒｎ法，对非等温动力学进行分析，推断第一步，第二步失水反应均按动力学方程ｄａ／ｄｔ＝３／２Ａｅ－Ｅ／ＲＴ（１－ａ）４／３｛〔１／（１－ａ）１／３－１〕｝－１进行，同时给出了动力学补偿效应表达式ｌｎＡ＝０．３０７４Ｅ－２．２０６２（第一步），ｌｎＡ＝０．２８９７Ｅ－１．９４９２（第二步）。     

Eu(bpy)2(NO3)3(H2O)2/Nafion修饰于金电极上的电化学发光性质研究

本文合成了铕-联吡啶的二元配合物Eu(bpy)2(NO3)3(H2O)2,用元素分析、红外及紫外光谱对配合物进行了表征.采用循环伏安法,研究了用Nafion将Eu(bpy)2(NO3)3(H2O)2修饰于金电极上的电化学发光行为.讨论了介质、pH对该体系电化学发光性质的影响,推测了Eu(bpy)2(NO3)3(H2O)2电化学发光的机理.结果表明:在没有共反应试剂存在的条件下,Eu(bpy)2(NO3)3(H2O)2在pH 8.0的硼砂缓冲溶液中可以产生较强的电化学发光,其发光体可能为Eu*(bpy)2(NO3)3(H2O)2.     

对硝基苯甲酸铕与2,2′-联吡啶配合物的合成及热分解的研究

在乙醇溶液中合成了一种新的铕(Ⅲ)的三元配合物,通过元素分析、红外光谱分析对其进行了表征.采用 TG-DTG 技术对其热分解过程进行了研究,并用三种非等温积分方程计算了动力学参数.     

十水草酸铈热分解过程和非等温动力学研究

用热重—差热分析法研究了十水草酸铈(Ce2(C2O4)3·10H2O)在程序升温下的热分解行为,TG曲线表明它有五个分解阶段,前三个阶段为脱水过程,后两个阶段为无水草酸铈热分解过程,最终产物为CeO2。对第四阶段无水草酸铈热分解为碳酸氧盐的过程进行了动力学研究,确定了其反应级数为2,表观活化能E=283.55kJ·mol-1,指前因子lnA=57.3119,热分解反应过程受F2机理控制。     

Thermal Decomposition Mechanism and Non Isothermal Kinetics of Complex of [La_2(P-MBA)_6(PHEN)_2]2H_2O

Ｏｗｉｎｇｔｏｔｈｅｖａｒｉａｔｉｏｎｏｆｃｏｏｒｄｉｎａｔｅｄｍｏｄｅｓｆｏｒｃａｒｂｏｘｙｌａｔｅａｎｉｏｎｓ ,ｍａｎｙｄｉｆｆｅｒｅｎｔｔｙｐｅｓｏｆｃｒｙｓｔａｌｓｔｒｕｃｔｕｒｅｓｆｏｒｔｈｅｒａｒｅｅａｒｔｈｃｏｍｐｌｅｘｅｓｗｉｔｈａｒｏｍａｔｉｃａｃｉｄａｎｄｎｉｔｒｏｇｅｎ ｃｏｎｔａｉｎｉｎｇｌｉｇａｎｄｓｗｅｒｅｏｂｔａｉｎｅｄ[1～ 4 ] .Ｔｈｅｉｒｔｈｅｒｍａｌｄｅｃｏｍｐｏｓｉｔｉｏｎｂｅｈａｖｉｏｒｈａｄｂｅｅｎｒｅ ｐｏｒｔｅｄｉｎｐｒｅｖｉｏｕｓｐａｐｅｒｓ[5～ 8] .…     

Synthesis and Characterization of Eu4(PMA)3(phen)0.75·7H2O Ternary Luminescent Complex

Eu(Ⅲ)-Pyromellitic acid[PMA]-1,10-phenanthroline (phen) ternary luminescent complex was prepared in ethanol and water mixed solvent. The elemental analysis, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) fourier-transform infrared spectroscopy (FT-IR) indicates that its chemical constitution is Eu4(PMA)3(phen)0.75·7H2O. TG-DTA curves indicated that the complex is heat stable at the temperature of 430 ℃. The XRD patterns showed that the complex is a new crystal different from the two ligands' structures. SEM image indicates that the complex is in block shape and disperses well. Photoluminescence (PL) analysis indicates that the complex emits Eu3 characteristic luminescence under ultraviolet excitation.     

Syntheses and Crystal Structure of Nine-Coordinate Mononuclear Na[ EuⅢ (edta)(H2O)3] · 4H2O and Binuclear Na4[Eu2Ⅲ(Httha)2]·10H2O Complexes

The crystal and molecular structures of the Na[Eu Ⅲ (edta) ( H2 O) 3] · 4H2O ( edta = ethylenediaminetetraacetic acid) and Na4[Eu2Ⅲ (Httha)2] · 10H2 O ( ttha = triethylenetetraminehexaacetic acid) complexes were determined by single-crystal X-ray structure analyses.The crystal of Na[ EuⅢ (edta) (H2O)3] · 4H2O belongs to orthorhombic crystal system and Fdd2 space group.The crystal data are as follows: a = 1.9415 (15)nm, b = 3.544(3 )nm, c = 1.203(9)nm, V = 8.327(5)nm3, Z = 16, M = 589.27, Dc= 1.880 g· cm-3, μ= 3.108mm-1 and F(000) = 4704.The final R and wR values are 0.0312 and 0.0750 for 2091[I ＞ 2.0σ (I)] reflections, and 0.0344and 0.0766 for all 3932 unique reflections, respectively.The[EuⅢ (edta) (H2O) 3] - anion has a nine-coordinate pseudo-monocapped square antiprismatic structure in which the nine coordinate atoms, two N and seven O, are from one edta ligand and three water molecules.The crystal of Na4[Eu2Ⅲ (Httha)2] · 10H2O belongs to orthorhombic system and Pccn space group.The crystal data are as follows: a = 2.610(3)nm, b = 2.089(3)nm, c = 2.239(3)nm, V =12.208 ( 28 ) nm3, Z = 8, M = 1548.92, Dc= 1.686g·cm-3,μ = 2.115 mm-1andF(000) = 6272.Thefinal R and wR are 0.0625 and 0.1091 for 9834[I ＞ 2.0σ(I)] reflections, and 0.1608 and 0.1471 for all 37818 unique reflections, respectively.The whole complex molecule is composed of two close parts in which each one has a nine-coordinate structure with distorted monocapped square antiprismatic prism.The ttha ligand in the[Eu2Ⅲ (Httha)2] 4- anion coordinates to one Eu Ⅲ ion with three N atoms and four O atoms and to the other Eu Ⅲ ion with two O atoms.     

Hydrothermal synthesis and crystal structure study of two novel 3-D mellitates {Nd2[C6(COO)6](H2O)6} and {Ho2[C6(COO)6](H2O)6}

Two novel 3-D coordination compounds, Nd2[C6(COO)6](H2O)6(1)and Ho2[C6(COO)6](H2O)6(2), were hydrothermally synthe-sized from mellitic acid and neodymium perchlorate (or holmium perchlorate) in the alkaline aqueous solution and characterized with ele-mental analysis, TG, IR spectrum, and single crystal X-ray diffraction. The two compounds were isostructural and crystallized in the ortho-rhombic system, space group Pnnm, with a=1.3531 (4) nm, b=0.6687 (2) nm, c=1.0224(3) nm, V=0.92523(5) nm3, Z=4, D=2.630 g/cm3, F(000)=696.0, Goof=1.052. Final R indices [I 2Σ(I)]: R1=0.0195, wR2=0.0382 for 1; a=1.3411(2) nm, b=0.6586(1) nm, c=1.0116(2) nm, V=0.8935(3) nm3, Z=4, D=2.877 g/cm3, F(000)=724.0, Goof=1.061. Final R indices [I 2Σ(I)]: R1=0.0200, wR2=0.0479 for 2. In the two compounds 1 and 2, the mellitic acid ligand, in which all the carboxylate groups were deprotonated, had only one kind of coordination mode to bridge metal ions to form four-connected three-dimensional diamondiod networks.     

Crystal Structure and Spectra of the Complex Eu(p-ClC_6H_4COO)_3C_(12)H_8N_2

ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅａｎｄＳｐｅｃｔｒａｏｆｔｈｅＣｏｍｐｌｅｘＥｕ（ｐ－ＣｌＣ_６Ｈ_４ＣＯＯ）_３Ｃ_（１２）Ｈ_８Ｎ_２ＪｉｎＬｉｎｐｅｉ（金林培）（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＢｅｉｊｉｎｇＮｏｒｍａｌＵｎｉｖｅｒｓｉｔ...     

Crystal and Molecular Structure of Triboluminescent Complex Eu(NO_3)(TTA)_2(TPPO)_2

Eu(NO_3)(TTA)_2(TPPO)_2 (TTA=thenoyltrifluoroacetone,TPPO=triphenylphosphine oxide),M=1212.90,triclinic P1,a=1.1081(2)nm,b=1.1857(2)nm,c=1.2580(2)nm,α=65.54(1)°,β=77.91(1)°,γ=61.99(1)°;Z=1,V=1.3281(4)nm~3,D_c=1.47g/cm~3,μ_(MoK_α)=14.1 cm~(-1).The crystal desplaystriboluminescence upon fracture.Structure study shows that the crystal is noncentrosymmetric and no disor-der is found.It is concluded that the polarity of crystals is necessary for the observation of triboluminescence.     

Exploration of Reactivity of Eu(TTA)2(phen)(MA)

The reactivity of Eu(TTA)2(phen)(MA) (HTTA=2-thenoyltrifluoroacetone, MA=maleic anhydride) was studied. A series of products were prepared by direct polymerization, suspension polymerization, and alternate suspension and solution copolymerization with the styrene. And then we reactivity of these products were studied. The complexes were investigated and characterized by X-ray Diffraction (XRD), gel permeation chromatography (GPC) and fluorescence spectrophotometer. Although high polymerization degree is not found in the exploration of reactivity, it is found that the fluorescent intensity of complexes prepared by suspension polymerization increases significantly compared with the original particles, which is five times higher than that of the pure rare earth complex.     

Syntheses and Structures of Two Heteronuclear Complexes with Glycine {[CuEr(Gly)_5(H_2O)_2](ClO_4)_5·H_2O}_n and {[Cu_2Gd_2(Gly)_10 (H_2O)_4](ClO_4)_10·4H_2O}_n

Ｉｎｔｈｅｐａｓｔｆｅｗｙｅａｒｓ ,ｔｈｅｍａｇｎｅｔｉｃｐｒｏｐ ｅｒｔｉｅｓｏｆｃｏｍｐｌｅｘｅｓｃｏｍｐｒｉｓｉｎｇｌａｎｔｈａｎｉｄｅａｎｄｔｒａｎｓｉｔｉｏｎｍｅｔａｌｉｏｎｓｈａｖｅａｔｔｒａｃｔｅｄｉｎｃｒｅａｓｉｎｇｉｎｔｅｒｅｓｔ[1～ 6 ] .Ｔｈｅｓｅｃｏｍｐｌｅｘｅｓａｒｅｉｍｐｏｒｔａｎｔｉｎｔｈｅｓｔｕｄｉｅｓｏｆｍａｇｎｅｔｉｃｅｘｃｈａｎｇｅｉｎｔｅｒａｃｔｉｏｎｂｅｔｗｅｅｎｌａｎｔｈａｎｉｄｅａｎｄｄ ｔｒａｎｓｉｔｉｏｎｍｅｔａｌｉｏｎｓ,ａｎｄｔｈｅｙｃａｎｐｒｏ…