5，10，15，20－四（对－山嵛酸乙酯－α－氧代苯基）卟啉LB膜结构研究

５，１０，１５，２０－四（对－山嵛酸乙酯－α－氧代苯基）卟啉ＬＢ膜结构研究王海水，曾广赋，谷淑珍，席时权（中国科学院长春应用化学研究所长春１３００２２）利用ＬＢ膜技术将分子组装成有序的分子单层或多层体系，研究膜内分子间相互作用和分子的结构，对了解结构...

5,10,15,20-四(对-乙酯苯基)卟啉LB膜的结构

对卟啉类化合物LB膜的结构、电性质和气敏性的研究已见报道。本文利用膜天平和UV-Vis分光光度计研究了标题化合物在气-液界面上的成膜特性、分子间相互作用和LB膜的结构。5,10,15,20-四(对-乙酯苯基)卟啉(TPEPP)由5,10,15,20-四(对-氰苯基)卟啉和乙醇酯化得到。元素分析测定值与计算值相符。λ(CHCl_3,nm):421,515,550,590,645;ν(KBr压

10种外眼病泪液中Ca,Mg,Zn,Fe元素测定

检测10种外眼病141例、178眼泪液中的Ca、Mg、Zn、Fe含量。结果显示,翼状胬肉和泡性角结膜炎泪液中的Ca,复发单疱病毒性角膜炎(HSK)泪液中的Ca、Mg、Zn、Fe,慢性结膜炎泪液中的Ca、Fe含量均明显低于对照组(P<0.001～0.05)。提示这4种外眼病的病因可能与泪液Ca、Mg、Zn、Fe含量不足有关。

CRYSTAL-STRUCTURE OF 1, 10-DECANEDIAMMONIUM TETRACHLOROZINCATE

The crystal structure of the title compound has been determined from single crystal X-ray diffraction. The complex crystallizes in the triclinic space group P1 with Z=2. Lattice parameters are: a = 0.7296(1), b = 1.0110(3), c = 1.2814(4) nm; alpha = 90.84(2), beta = 101.17(2), gamma = 92.52(2)-degrees. Intensity data were collected on a Nicolet R3M/E four-circle diffractometer using MoK alpha (lambda = 0.071073 nm) radiation. The structure was solved by Patterson and Fourier techniques and refined by least-squares techniques to R = 0.065. The structure of the complex consists of tetrahedral ZnCl42- anions which form a two-dimensional sheets. Tetrahedral ZnCl42- anions are sandwiched between two hydrocarbon layers which consist of [NH3(CH2)10NH3]2+ cations. Each [NH3(CH2)10NH3]2+ group is in a gauche bond between C atoms near NH3 polar heads.

SYNTHESIS AND CRYSTAL-STRUCTURE OF NEODYMIUM COMPLEX OF 1-METHYL-1, 4, 7, 10-TETRAAZACYCLODODECANE

The complex [Nd(L)(CH3CN)(CF3SO3)3] has been synthesized. Where L = 1-methyl-1, 4, 7, 10-tetraazacycldodecane. The crystal structure of the complex has been determined by a four-circle X-ray diffractometer to a final deviation factor B value of 0.0370 and R(w) value of 0.0385 respectively. The crystal is triclinic system, space group P1BAR with a = 0.8738(2), b = 1.2870(3), c = 1.2900(3) nm, alpha = 85.63(2), beta = 87.25(2), gamma = 78.30(2)-degrees, V = 1.41571 (60) nm3, Z = 2, D(c) = 1.92 g/cm3. The neodymium ion is eight-coordinated to forming a distorted square antiprism.

STRUCTURE OF 1,10-DIAMINODECANE TETRACHLOROZINCATE

[NH3(CH2)10NH3][ZnCl4], M(r) = 381.51, triclinic, P1BAR, a = 7.296 (1), b = 10.110 (3), c = 12.814 (4) angstrom, alpha = 90.84 (2), beta = 101.17 (2), gamma = 92.52 (2)-degrees, V = 926.13 angstrom 3, Z = 2, D(x) = 1.37 Mg m-3, lambda(Mo K-alpha) = 0.71073 angstrom, mu = 1.925 mm-1, F(000) = 396, T = 298 K, final R = 0.070 for 1237 unique reflections [I > 3-sigma(I)]. The structure is characterized by layers of inorganic ions sandwiched between layers formed by the paraffinic chains.

四氯合锌酸1,10-癸二铵配合物的晶体结构

合成了[NH_3(CH_2)_(10)NH_3]ZnCl_4配合物(简称DDAZn),用X射线衍射法研究了它的晶体结构,晶体属三斜晶系,空间群为P1,晶胞参数为:α=0.7296(1),b=1.0110(3),c=1.2814(4)nm;α=90.84(2),β=101.17(2),γ=92.52(2)°;Z=2.该配合物为层型结构.由单个四面体阴离子ZnCl_4~(2-)构成的阴离子层被夹在烷基铵阳离子层之间,形成“夹心面包”型体系.在层之间的烷基铵链在垂直于层的方向上倾斜排列.

1-甲基-1,4,7,10-四氮杂环十二烷镧配合物的合成及晶体结构

合成了1-甲基-1,4,7,10-四氮杂环十二烷(L)配体。在乙腈中培养了La(L)(CH_3CN)-(H_2O)(CF_3SO_3)_3配合物单晶,测定了其红外光谱和质子核磁共振谱。用X射线衍射方法测定了配合物的晶体结构,该晶体属于单斜晶系,P2_1/n空间群,a=0.9700(2)nm,b=1.5966(2)nm,c=1.9085(1)nm,β=104.71(3)°,V=2.8588(50)nm~3。配合物中镧为9配位,其配位多面体为扭曲的单帽四方反棱柱体。

STRUCTURE OF CIS-DIAQUABIS(1,10-PHENANTHROLINE)ZINC SULFATE HEXAHYDRATE

[Zn(C12H8N2)2(H2O)2]SO4.6H2O, M(r) = 665.98, triclinic, P1BAR, a = 10.070 (4), b = 12.280 (3), c = 13.358 (2) angstrom, alpha = 109.12 (2), beta = 92.58 (2), gamma = 110.85 (2)-degrees, V = 1433.9 (7) angstrom 3, Z = 2, D(x) = 1.54 g cm-3, lambda(Mo K-alpha) = 0.71069 angstrom, mu = 10.1 cm-1, F(000) = 692, T = 293 K, R = 0.044 for 3985 observed reflections. The Zn atom is coordinated in a distorted octahedral geometry by four N atoms from two 1,10-phenanthroline (phen) ligands and two water molecules. The intermolecular ring-stacking interactions between the phen ligands occur in two forms: infinite chains and discrete dimers. Hydrogen bonds further stabilize the structure.

Eu~(3+)离子在晶体KY_3F_(10)、YPO_4及YVO_4中的角重迭晶场参数计算

本文运用角重迭模型首次对Eu~(3+)离子在KY_3F_(10)S、YPO_4及YVO_4晶体中的四个角重迭参数e_σ、e_π、e_δ、e_φ进行了计算。结果表明,所得规律与文献[1]基本相符,并且e_σ和e_φ两个参数对能级的劈裂和移动也有着不可忽略的作用。

水溶性聚合物和两亲聚合物——10.两亲聚合物PAMC_(16)S的自组装有序膜

用自组装技术在金(纯金和经阳极氧化的金)表面上获得了新型两亲聚合物PAMC_(16)S的有序膜。用接触角测试,XPS谱和电化学分析等方法对自组装膜进行了表征。根据膜表面的润湿性,金表面的自组装膜是疏水的,亲水的磺酸基团连于金表面,而疏水的碳氢链从表面伸展出。XPS实验结果支持金表面上单层膜的疏水结构。聚合物单层膜复盖的金电极起到含有针孔缺陷的阻膈型电极的作用。单层膜在法拉第反应中显示很强的吸附稳定性,说明聚合物LB膜在潜在应用中有其特有的特点。

稀土钼硅杂多酸根配合物K_(10)H_3[Pr(SiMo_(11)·O_(39))_2]·18H_2O的合成及晶体结构

本文采用低温技术,在—90℃的干燥氮气保护下,收集标题化合物晶体的衍射数据,用重原子法解出结构。P2_1/n空间群,a=17.504(2),b=27.323(5),c=21.616(4),β=104.49(2)°,z=4.8320个衍射参与精修,最后的R值为0.088。中心离子Pr(Ⅲ)同2个钼硅杂多酸根中的8个氧原子键合,形成正方反棱柱配位多面体。Pr—O的平均键长为2.44(2)。钼硅杂多酸根配体具有缺位的α型Keggin结构。

(Ce,Gd,Mn)MgB_5O_(10)磷光体的合成及其发光

本文采用固相反应的方法合成了一系列(Ce,Gd,Mn)MgB_5O_(10)磷光体。观察到合成温度、灼烧时间、原料配比对磷光体的形成和发光亮度有重要影响。X射线衍射分析表明,磷光体结构与LaMgB_5O_(10)相同,属单斜晶系、空间群P2_(1/c)。用EPR确定了磷光体中锰离子为二价。测定了(Ce_(0.2)La_(0.2))MgB_5O_(10),(Gd_(0.7)La_(0.3))MgB_5O_(10),(Mn_(0.05)La_(0.95))MgB_5O_(10),(Ce_(0.2)Mn_(0.05)La_(0.75))MgB_5O_(10),(Gd_(0.95)Mn_(0.05))MgB_5O_(10)、(Ce_(0.2)Gd_(0.8))MgB_5O_(10)和(Ce_(0.2)Gd_(0.75)Mn_(0.05))MgB_5O_(15)等磷光体的光谱。根据光谱数据讨论了(Ce_(0.2)Gd_(0.75)Mn_(0.05))MgB_5O_(10)磷光体中能量传递过程为:Ce~(3+)→Mn~(2+),Gd~(3+)→Mn~(2+)以及Ce~(3+)→Gd~(3+)→Mn~(2+),其中Ce~(...

K_5LnLi_2F_(10)(Ln=La,Gd,Y)的合成和Ce~(3+)在其中的发光

在Ar气氛中,采用高温固相反应法合成了K_5LnLi_2F_(10)(Ln=La,Ce,Gd,Y)化合物。X射线衍射图表明:除K_5YLi_2F_(10)外,均具有与K_5NdLi_2F_(10)(KNLF)相同的结构。计算了K_5LnLi_2F_(10)(Ln=La,Ce,Gd)的晶胞参数和晶胞体积,它们随着La~(3+),Ce(3+),Gd~(3+)的离子半径减小而有规律地减小。测定了K_5Ce_?Ln_(1-?)Li_2F_(10)化合物的激发光谱和荧光光谱。发现Ce~(3+)的激发波长和发射波长随着La~(3+),Gd~(3+),Y~(3+)离子的改变几乎不变,并对这种现象进行了讨论。

Characterization of the main light-harvesting chlorophyll a/b-protein complex of green alga, Bryopsis corticulans

The main light-harvesting chlorophyll a/b -protein complex (LHC II) has been isolated directly from thylakoid membranes of shiphonous green alga, Bryopsis corticulans Setch. by using two consecutive runs of anion exchange and gel-filtration chromatography. Monomeric and trimeric subcomplexes of LHC 11 were obtained by using sucrose gradient ultracentrifugation. Pigment analysis by reversed-phase high performance liquid chromatography showed that chlorophyll a (Chl a), chlorophyll b (Chl b), neoxanthin, violaxanthin and siphonaxanthin were involved in LHC 11 from B. corticulans. The properties of electronic transition of monomeric LHC II showed similarities to those of trimeric LHC II. Circular dichroism spectroscopy showed that strong intramolecular interaction of excitonic dipoles between Chl a and between Chl b exist in one LHC II apoprotein, while the intermolecular interaction of these dipoles can be intensified in the trimeric structure. The monomer has high efficient energy transfer from Chl b and siphonaxanthin to Chl a similarly to that of the trimer. Our results suggest that in B. corticulans, LHC II monomer has high ordered pigment organization that play effective physiological function as the trimer, and thus it might be also a functional organization existing in thylakoid membrane of B. corticulans.