Ⅱ-Ⅵ族化合物半导体超微粒子光谱性质的研究:Ⅰ硫化物

本文报道了锌、镉、汞、铅硫化物半导体极超微粒子的制备以及它们的光谱性质,比较了它们的粗、细粒子的吸收光谱和荧光光谱的差异,用量子化粒径效应解释了当超微粒子的粒径减小时出现的能级分裂.同时讨论了上述物质的极超微粒子在老化过程中的行为及其原因.     

六氨合钴离子交换法测定粘土中阳离子交换容量

六氨合钴离子「Ｃｏ（ＮＨ３）６」＾３＋具有与粘土中主要阳离子（Ｃａ＾２＋、Ｍｇ＾２＋、Ｋ＾＋、Ｎａ＾＋、Ｈ＾＋等）交换的能力。稳定性好,并在４７４ｎｍ处有最大吸收。利用分光光度法,以「Ｃｏ（ＮＨ３）６」＾３＋作为交换离子,测定阳离子交换容量。试验表明,在ＰＨ７－８,常温条件下７ｈ交换达到平衡;在８０℃时３ｈ可以达到平衡。粘土中共生的非粘土矿物、游离金离离子不干扰其测定。用该法测得的阳离子交换容量值与氯化铵溶液法,盐基分是测定法测得的结果一致。     

Ⅱ -Ⅳ族化合物半导体超微粒子光谱性质的研究Ⅱ : 硒化物、碲化物

本文报道了锌、镉、汞、铅硒化物、碲化物半导体超微粒子的制备以及它们的光谱性质 ,比较了它们的粗、细粒子的吸收光谱和荧光光谱的差异 ,以及与硫化物超微粒子的相似性 ,同时讨论了上述物质的超微粒子在老化过程中的行为及其原因.     

Ⅱ－Ⅳ族化合物半导体超微粒子光谱性质的研究Ⅱ：硒化物、碲化物

本文报道了锌、镉、汞、铅硒化物、碲化物半导体超微粒子的制备以及它们的光谱性质，比较了它们的粗、细粒子的吸收光谱和荧光光谱的差异，以及与硫化物超微粒子的相似性，同时讨论了上述物质的超微粒子在老化过程中的行为及其原因．     

4-[2-(4,6-二甲氧基-2-嘧啶氧基)苄胺基]苯甲酸正丙酯的合成和晶体结构

2-甲砜基-4,6二甲氧基嘧啶和N-(4-丙氧羰基苯基)-2-羟基苄胺在四氢呋喃溶液中反应, 生成标题化合物4-[2-(4,6-二甲氧基-2-嘧啶氧基)苄胺基]苯甲酸正丙酯,并测定了其晶体结构。该化合物分子式为C23H25N3O5,晶体属单斜晶系,空间群为P2/n,晶胞参数为a = 14.8504(8),b = 9.4420(4),c = 16.3129(9) 牛 = 104.881(1)埃琕 = 2210.6(2) 3,Z = 4,Dc = 1.272 g/cm3,F(000) = 896.00,(MoK? = 0.91 cm-1,R = 0.051,wR = 0.118,获得19761衍射数据,其中独立衍射点5004个。经元素分析、IR、MS和HNMR等对化合物的结构进行了表征。在分子结构中,各有3个不同的共轭平面。嘧啶环和苯环(C(7) C(12)),及苯环(C(14) C(19))的夹角分别为99.18 , 164.15埃?个苯环之间的夹角为94.93啊;衔锍世啻焦瓜蟆?     

高氯酸稀土Sm(Ⅲ)开环冠醚(EO4)配合物的晶体结构

The crystal of title compounds belongs to orthorhombic system with space group P2₁2₁2₁ (No.19). The cell parmeters are a=1.432 16(3) nm, b=1.457 20(3) nm， c=3.005 85(6) nm, and V=6 273.0(2) nm³, Z=8, μ(Mo Kα)=22.21 cm^-1， D_c=1.802 g·cm^-3, F(000)=3 416.00, Finally R₁=0.033 and wR₂=0.073 (I>2.00σ(I)), S=1.023. Every center atom Sm(Ⅲ) is surrounded by the two aether chains, the title compound has ten-coordinate structure and the coordination polyhedron shows a Bicapped Square Antiprism. In the crystal, the title compound has the flack of double moleculars and non-symmetry. The anion ClO₄^- does not take part in the coordination. CCDC: 238709.     

丁二酮肪二氯合铜二聚体的晶体结构

本文报道了丁二酮厉中性分子的Cu(II)配合物的晶体结构.P-1空间群,晶胞参数:a =7. 590(1),b=8. 109(1),c = 8. 152(1)人,a=108.10(1),夕=101.24(1),y=110.85(1)0,V=424. 0(1)人',Z=1,Dr=1. 9628·cm-',}e= (MoKa)=3. 171mm-' ,R=0. 025.配合物中,氯离子作为电荷平衡成分与Cu (II)配位以外,还作为桥配体与邻近的另一Cu(II)配位形成二聚体.相邻的铜原子间距离3. 4504人意味着分子内可能存在磁的超交换相互作用.中性丁二酮厉配体中.两个厉氧上的氢分布不对称,一个与邻近的氛形成氢键,另一个则远离氯原子;桥氯原子上低的电荷密度被解释为这一差异的原因.     

ⅠVI族化合物半导体超微粒子 光谱性质的研究‘.I硫化物

本文报道了锌、福、汞、铅硫化物半导体极超微粒子的制备以及它们的光谱性质，比较了它们的粗、细粒子的吸收光谱和荧光光谱的差异，牙量子化粒径效应解释了当超徽粒子的粒径减小时出现的能级分裂.同时讨论了上述物质的极超徽粒子在老化过程中的行为及其原因.     

Coordination behavior of N-benzoylamino acids: Synthesis and structure of mixed-ligand complexes of palladium(Ⅱ) with N-benzoylamino acid dianion and diamine

Four new mixed-ligand complexes of pailadiumt(Ⅱ) with L1(N-benzoyl-α-amino acid dianion) and L2[ethyldiamine (en),2,2'-bipyridine (Bpy) and 1,10-phenanthroline (Phen)] were synthesized.Ail the complexes have been characterized by elemental analyses,molar conductance,infrared and 1H NMR spectra and therme-gravimetric analyses.Crystal structures of [Pd(Bpy)(Bzval-N,O)] and [Pd(en) (Bzphe-N,O)] H2O have been do termmed by X-ray diffraction analysis.The results indicate that in all the complexes hgand L1 coordinates to palladium (Ⅱ) through deprotonated amide nitrogen and carboxylic oxygen,and there are some intramolecular nonrovalent in teractions in the complexes.     

Preparation and Crystal Structures of Two Polymorphic Forms of Bupropion Hydrobromide

Two polymorphic forms (forms I and IV) of antidepressant bupropion hydrobro- mides were prepared and characterized by powder X-ray single-crystal diffractometer. Lots of commercial substances may consist of form I. Form I crystallizes in the triclinic system, space group P1 with Z = 2, a = 7.6943(8), b = 7.9347(9), c = 13.8558(15) , α = 85.971(3), β = 85.619(2), γ = 65.974(3)°, V = 769.66(14) 3, Dc = 1.384 g/cm3, formula C13H19ClNOBr, F(000) = 328, μ = 2.83 mm-1, the final R = 0.0579 and wR = 0.1282 for 1756 observed reflections with I > 2σ(I). Another polymorphic form, Ⅳ, belongs to the orthorhombic system, space group Pbca with a = 8.6365(3), b = 12.4167(4), c = 27.7299(9) , Z = 8, V = 2973.67(17) 3, Dc = 1.432 g/cm3, formula C13H19ClNOBr, F(000) = 1312, μ = 2.93 mm-1, the final R = 0.044 and wR = 0.1093 for 2018 observed reflections with I > 2σ(I). In the crystal structure of the two polymorphic forms, expected proton transfer from HBr to amino group of bupropion molecule occurs and intramolecular and intermolecular hydrogen bonds N–H···r are formed. These interactions result in hydrogen-bond dimers in these two forms. The bupropion molecule adopts different conformations in the two investigated solid state modifications.