The synthesis, luminescence and energy transfer of the binary and ternary complexes of rare earth with aminobenzoic acids and 1,10-phenanthroline

Thirteen kinds of binary and ternary complexes of rare earth (Gd, Eu,Tb) with ortho (para) aminobenzoic acid and 1.10--phenanthroline were synthesized and characterized. The phosphorescence spectra and lifetimes of gadolinium complexes were measured and the lowest triplet state energies of ligands and the energy transfer efficiencies between ligands were determined. The luminescence properties and intramolecular energy transfer of these complexes were studied in details.

铁1,10-菲咯啉/MCM-41催化苯酚羟化反应的研究

MCM-41分子筛是最近美国Mobil公司开发出的一种新材料,其孔径范围在2.0～25nm之间,具有较大的Si/Al比和大的比表面积及孔隙率,孔道大小均匀.其对弱极性的环状及芳族化合物具有较大的吸附能力.自这种新型分子筛合成以来,才开始应用于石油炼制及烯烃裂解,歧化的研究.至今还没有关于将MCM-41作为载体,用于负载金属配合物催化剂的报道.本文利用自己合成的MCM-41分子筛作为载体,制成了负载铁的1,10-菲咯啉配合物催化剂(简记FePhen/MCM-41),并将其应用于苯酚的羟化反应,发现其对苯酚的羟化反应具有较好的催化性能.1 实验部分1.1 FePhen/MCM-41的制备将参考文献[3]制得的MCM-41分子筛,取5g放入200mL0.05mol/L的[Fe(Phen)_3]Cl_2乙醇溶液中,室温搅拌24h,抽滤,所得固体用乙醇洗涤3次,以除去MCM-41分子筛表面和孔道内结合不牢的金属配合物.利用原子吸收光谱分析仪,测得负载催化体系中铁元素的含量为0.65%.1.2 MCM-41分子筛及FePhen/MCM-41的表征

ELECTROACTIVE COATINGS OF DICYANO-BIS(1,10-PHENANTHROLINE)IRON(II) ATTACHED TO NAFION POLYMER FILM-MODIFIED ELECTRODES VIA ADSORPTION

A dicyano-bis(1,10-phenanthroline)iron(II) modified elecrode was prepared. The voltammetric and the spectroelectrochemical behavior of this electrode were investigated. The influence of pH and the amount of Nafion and dicyano-bis(1,10-phenanthroline) iron(II) (DBPI) used in the electrode preparation on the electrochemical behavior is presented.

STUDIES ON ORGANOLANTHANIDE COMPLEXES .56. FORMATION OF ION-PAIR COMPLEXES [NA.3PHEN]+[LN(C5H5)3CL]-.PHEN (LN=LA, PR OR ND, PHEN = 1,10-PHENANTHROLINE) AND CRYSTAL-STRUCTURE FOR LN=PR

In the presence of 1,10-phenanthroline (phen), lanthanide chlorides LnCl3 reacted with cyclopentadienylsodium to give the novel complexes [Na.3phen]+[Ln(C5H5)3Cl]-.phen (Ln = La, Pr or Nd). In the praseodymium case, crystal structure analysis showed that

CATALYTIC-OXIDATION AND FLOW DETECTION OF ACETAMINOPHEN AT A DICYANOBIS(1,10-PHENANTHROLINE)IRON(II)-MODIFIED ELECTRODE

Dicyanobis(1,10-phenanthroline)iron(II)-modified glassy carbon electrodes were shown to exhibit an electrocatalytic response for the oxidation of acetaminophen with a decrease of 100 mV in the potential required. It can also inhibit the oxidation of ascor

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.

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.

cis-Dichloridobis(1,10-phenanthroline-kappa N-2,N ')-cadmium(II) hemihydrate

The title compound, [ CdCl2( C12H8N2)(2)]center dot 0.5H(2)O, crystallizes with two independent complex molecules and one water molecule in the asymmetric unit. The Cd atoms in both independent complexes display a distorted octahedral coordination geometry formed by four N atoms from two phenanthroline ligands and two Cl atoms. In the crystal structure, pi-pi stacking interactions link complexes in two symmetry- independent ladders parallel to the c axis. Intermolecular O-H center dot center dot center dot Cl hydrogen bonds stabilize the crystal packing.

Triaqua(benzene-1,2-dicarboxylato-kO)-(1,10-phenanthroline-k(2)N,N ')zinc(II) monohydrate

The structure of the title compound, [Zn(C8H4O4)(C12H8N2)-(H2O)(3)]center dot H2O, displays a distorted octahedral coordination geometry, with two N atoms from the bidentate phenanthroline ligand, three O atoms from three meridional H2O molecules and one O atom from the monodentate phthalate ion.

水稻化感物质对土壤微生物的作用

本文主要目的是探讨水稻化感品种对土壤微生物的影响，为进一步阐明水稻化感品种与稻田微生物的生物化学关系奠定基础。在分离出两种水稻化感物质黄酮甙基础上，首先研究水稻化感物质对环境因子的响应情况。同时，探讨土壤中黄酮甙的降解动态和水稻组织及其释放到培养基质中的黄酮甙浓度情况，并用土壤薄层层析和生测实验研究黄酮甙在土壤中的迁移性。随后系统研究水稻化感品种幼苗、萌发液、根分泌物以及水稻化感物质黄酮甙对土壤微生物的作用。结果表明： 1、虽然化感物质释放程度和环境因子有关，但主要取决于水稻自身的化感特性。黄酮甙进入土壤10 h后消失，生成稳定的黄酮甙元，这种甙元是水稻真正的化感物质，因此，黄酮甙是水稻化感品种存储化感物质的形式，而不是真正起作用的物质。 2、水稻化感品种根际土壤中的微生物数量受到显著的抑制作用，根际土壤微生物的群落结构和对照土壤相似，和水稻非化感品种根际土壤微生物的群落结构不同。 3、向土壤中施加萌发液和根系分泌物初期，土壤细菌、氨化细菌、放线菌数量表现为水稻非化感品种大于水稻化感品种。水稻化感品种土壤中的微生物生物量碳受到抑制，而真菌生物量受到促进。萌发液土壤中对照和水稻化感品种群落结构变化相似，根分泌物土壤中对照和水稻非化感品种群落结构变化相似。 4、施加低浓度黄酮甙土壤中的细菌、氨化细菌以及真菌数量均高于高浓度黄酮甙土壤中的数量，但是土壤中的放线菌和真菌生物量却表现为：随着土壤中黄酮甙浓度升高，受到的抑制作用增强。在添加浓度范围内，黄酮甙对土壤微生物群落结构产生不同影响。

人工湿地基质净化磷素的吸附剂性能

通过基质磷素等温吸附实验,研究了砂子、水淬渣、钢渣3种人工湿地基质净化磷素的效果.结果表明:Freundlich和Langmuir等温吸附曲线方程均能较好地描述上述基质磷素吸附的过程,其磷素理论饱和吸附量依次为钢渣12 500 mg.kg-1,水淬渣3 333 mg.kg-1,砂子270 mg.kg-1.基质吸附饱和后,磷素解吸实验表明:水淬渣磷素解吸率最低,为0.68%;砂子的解吸率最高,为7.59%.虽然钢渣的吸附量最大,但其水溶液pH显强碱性,不适合湿地植物的生长;水淬渣作为一种工业废料,磷素吸附量为砂子的12倍左右,解吸率为砂子的1/10,而且对植物生长无明显危害,是一种比较有应用前景的湿地除磷材料.

硬粒小麦-节节麦人工合成种HMW-GS组成及1.5＋10亚基的遗传分析

对CIMMYT的99份硬粒小麦-节节麦人工合成种（简称合成种）的HMW-GS组成分析发现，Glu-B1和Glu-D1位点的变异类型比普通小麦丰富，分别有9种和12种亚基类型；筛选出含有比5＋10亚基更优质的1．5＋10和5＋12亚基的合成种分别有8份和1份；含有优质亚基1．5＋10的合成种与普通小麦杂交结实正常；对2个合成种与2个普通小麦品种的8个止反交组合F1种子电泳发现，优质亚基1．5＋10在F1代能正常表达，双亲所有亚基任F1代都得到表达，表现共显性遗传。本研究为优质亚基1．5＋10和5＋12转育到普通小麦中奠定了基础。

LY-12铝高温凝聚态动力学性质研究——高温弹性模量的测定

金属材料的高温动态力学性能是材料科学领域中的重要方面。本文介绍LY-12合金铝在常温至450℃的温度区间内和动载下(应变率为 10~3/秒),材料弹性模量的研究。此项研究采用的试验装置为一维Hopkinson压杆及管式高温炉。应用一维弹性应力波传播理论,测得LY-12铝试件在不同温度T条件下的声速c(T),按照c(T)=[E(T)/ρ(T)]~(1/2),获得杨氏模量E(T)随温度的变化曲线。

室温铁磁性半导体Mn_xGa_(1-x)Sb

采用离子注入、离子沉积及后期退火方法制备了稀磁半导体单晶Mn_xGa_(1-x)Sb，在室温下（300 K）获得了单晶的磁滞回线。用X射线衍射方法分析了铁磁性半导体单晶Mn_xGa_(1-x)Sb的结构，用电化学C-V法分析了单晶的载流子浓度分布。由X射线衍射得知，Mn_xGa_(1-x)Sb中Mn含量逐渐由近表面处的x = 0.09下降到晶片内部的x = 0。电化学C-V测得单晶的空穴浓度高达1 * 10~(21)cm~(-3)，表明Mn_xGa_(1-x)Sb单晶中大部分Mn原子占据Ga位，起受主作用。