检索结果-南通市图书馆

Controlled Synthesis and Optical Properties of Lanthanide-doped Na3ZrF7 Nanocrystals

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2018年第11期37卷 1737-1748页

作者：付虎辉刘永升江飞龙洪茂椿 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Sciences School of Physical Science and Technology Shanghai Tech.University Shanghai Institute of Ceramics of the Chinese Academy of Sciences

In this paper,we report for the first time the controlled synthesis of lanthanide ion(Ln3+)-doped tetragonal-phase Na3Zr F7nanocrystals(NCs)via a high-temperature co-precipitation *** as-synthesized Na3Zr F7NCs are systematically studied by utilizing the XRD,TEM as well as high-resolution photoluminescence(PL)*** morphology and size for the as-synthesized Na3Zr F7NCs can be finely controlled by changing the experimental parameters such as the amount of precursor,solvent ratio,reaction temperature and *** utilizing the red-emitting Eu3+ion as an efficient optical/structural probe,the successful hetero-valence doping of Ln3+activators in the lattices of Na3Zr F7NCs is well-established regardless of their different valences and radii between host Zr4+ion and Ln3+*** a result,intense upconversion(UC)luminescence(UCL)ranging from UV to visible and to NIR spectral regions can be readily achieved after the doping of typical UCL couples of Yb3+/Er3+,Yb3+/Tm3+and Yb3+/Ho3+into the lattices of Na3Zr F7NCs when excited by using a 980-nm NIR diode laser.

关键词： lanthanide ion Na3ZrF7 nanocrystals upconversion luminescence

Synthesis and Crystal Structure of a Novel Hydrogen-Bonded Three-Dimensional Polymer [Zn(1,4-benzenedicarboxylate)-(pyridine)·H_2O]_n

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2002年第10期20卷 1124-1128页

作者：王瑞虎洪茂椿翁家宝曹荣罗军华 State Key Laboratory of Structural Chemistry Fujian Institute of the Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Email: Rong Cao (hmc@***)

A zinc(II) complex [Zn(bdc)(py)·H 2O] n (bdc=1,4-benzenedicarboxylate, py=pyridine) has been prepared and characterized. Single crystal X-ray diffraction analysis reveals that the complex crystallizes in the monoclinic space group P2 1/n with a=0.84823(3), b=0.91440(3), c=1.65141(2) nm, β=91.243(2)°, V=1.28057(6) nm 3, Z=4. The coordination geometry at each Zn(II) center is a distorted tetrahedron. Two independent bdc ligands in a herringbone pattern link alternatively four-coordinated Zn(II) centers into a one-dimensional polymeric chain. Hydrogen bonds among coordinated water molecules and uncoordinated oxygen atoms of two independent bdc ligands from different polymeric chains extend one-dimensional polymeric chains into a three-dimensional structure.

关键词： crystal structure 1,4-benzenedicarboxylate zinc(II) polymer hydrogen bonding

过渡金属配合物的结构规律及Fe_3(bdt)_3(PBu_3~n)_3的合成与结构

在线全文

学校读者我要写书评

暂无评论

中国科学（B辑） 1993年第2期23卷 132-138页

作者：康北笙徐勇进吴达旭彭金海洪茂椿翁林红陈学太刘汉钦结构化学国家重点实验室中国科学院福建物质结构研究所福州350002

本文总结邻苯二硫酚(H_2bdt)在一系列过渡金属化合物中的结构规律,并报道在三丁基膦作用下簇合物Fe+3(bdt)_3(Pbu_3~n)_3,的生成反应。化合物属三斜晶体的P空间群,单胞参数:a=13.283(3),b=20.115(5),c=13.156(3),α=90.33(2),β=116.47(1),γ=92.19(2)°,Z=2,d_c=1.26g/cm^3;结构以直接法解出,以I>4σ(I)的4122个独立衍射点进行计算,最终收敛至R(R_w)=0.053(0.060)。化合物有较强的顺磁性。

关键词：三核铁簇合物过渡元素络合物

Structure and Luminescent Property of a Novel 4-Hydroxyquinoline-2-carboxylate Based Zn(Ⅱ) Complex

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2012年第2期31卷 179-184页

作者：盖艳丽杨明冯蕊陈莲江飞龙洪茂椿 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences Graduate School of Chinese Academy of Sciences

A 3D coordination polymer [Zn2（hqc）2（H2O）]n has been obtained from the reaction of 4-hydroxyquinoline-2-carboxylic acid （H2hqc） with zinc（II） salt under hydrothermal condition, and characterized by elemental analysis, IR, TGA, PXRD and X-ray single-crystal diffraction. The complex crystallizes in the monoclinic system, space group P21/c with a = 14.305（2）, b = 9.132（2）, c = 15.356（2）, β = 103.586（7）o, V = 1949.9（4）3, Z = 4, Dc = 1.782 g/cm3, μ = 2.508 mm-1, Mr = 523.06, F（000） = 1048, T = 293（2） K, λ（MoKα） = 0.71073, S = 1.008, the final R = 0.0329 and wR = 0.0745 for 3849 observed reflections （I 〉 2σ（I））. The title complex features a 3D framework via Zn（2） linking the 1D {Zn1（hqc）2}n chains. Thermogravimetric analysis shows that its framework is highly thermally stable up to 556 ℃ in the solid state.

关键词： zinc 4-hydroxyquinoline-2-carboxylic acid 3Dframework luminescence properties

Electron-rich Polynuclear Transition Metal Clusters:Ⅱ.Synthetic and Structural Studies of Some Polynuclear Coinage Metal Cluster Compounds

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1994年第4期13卷 316-323页

作者：洪茂椿刘汉钦 StateKeyLaboratoryofStructuralChemistryandFujianIn StateKeyLaboratoryofStructura

The syntheses and structures of a novel series of polynuclear coinage metal cluster compounds are discussed. The most fascinating structural characteristic of the Au-Ag alloy clusters with Au_18Ag_19 and Au_18Ag_19 cores and phosphine ligands, which were prepared by the reduction of mononuclear coinage metal complexes R3PAuX and R3PAgX with NaBH4 in organic solution, is their construction from 13-atom gold-centred icosahedral Au_7Ag_6 building blocks. The structures of the polynuclear coinage metal clusters with R2dtc ligands are variable with either unlimited linear chain or triangular M3 units.

关键词： polynuclear coinage metal clusters syntheses icosahedral building blocks linear chain

在线全文

学校读者我要写书评

暂无评论

贺信

波谱学杂志 2007年第4期 373-373页

作者：洪茂椿波谱学专业委员会

New Type of Polymeric Chain Constructed by Exo-bidentate Binaphthol Derivative

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2005年第10期23卷 1367-1370页

作者：弓亚琼韩磊王瑞虎娄本勇吴本来洪茂椿 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The self-assembly of a racemic exo-bidentate ligand 2,2＇-bis（4-pyridylmethyloxy）-1,1＇-binaphthyl, namely Rac-L, with cadmium（Ⅱ） salt gave rise to a new one-dimensional polymer, which has been characterized by single crystal X-ray diffraction analysis. The polymer crystallizes in a triclinic space group P-1 with unit cell parameters： a=0.6976（1） nm, b= 1.30160（14） nm, c= 1.71146（17） nrn.α= 105.141（3）°, β=94.263（5）°, γ= 100.405（4）°, V= 1.4633（2） nm^3, Z=2, C32H29CdCl2N2O4.5, M=696.88, Dc= 1.584 g/cm^3, F（000）=708,μ（Mo Kα）=0.972 mm^-1. The final R and wR are 0.0498 and 0.1282 for 5079 observed reflections with I≥2σ（I）.

关键词： cadmium(Ⅱ) coordination polymer crystal structure binaphthol derivative

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

我国光电子晶体材料与器件的发展现状和建议

中国科学院院刊 2005年第4期20卷 293-296,304页

作者：兰国政洪茂椿福建物质结构研究所福州350002

光电子晶体材料与器件在科技、军事、先进制造等领域发挥日益重要的作用。本文分析了我国光电子晶体材料和器件的研发优势和存在问题,提出了我国发展光电子晶体材料和器件的建议。

关键词：光电子晶体材料与器件现状建议晶体材料光电子器件先进制造

含R_2dtc配体Mo-Cu化合物的动态^(95)Mo NMR

在线全文

学校读者我要写书评

暂无评论

分析测试通报 1992年第5期11卷 40-42页

作者：曹荣雷新建谢秀兰黄致盈洪茂椿刘汉钦武汉波谱与原子分子物理实验室福州结构化学开放实验室

本实验利用动态^(95)Mo NMR监测Mo-Cu系列化合物的形成过程,对反应CuCl+NaR_2dtc+MoO_nS,摩尔比3:3:1,溶剂为DMF;R=Et,n=0(Ⅰ);R=Me,n=0(Ⅱ);R=Et,n=2(Ⅲ)进行了研究,观察到具有不同簇骼的多种中间产物的存在及随反应进程相互转化等现象。

关键词： NMR Mo-Cu化合物 NMR 动态监测