نتایج جستجو برای: anionic structure

تعداد نتایج: 1576850  

2010
Hongyang Wei Jinfang Zhang Chi Zhang

Hexa-methyl-phospho-ramide (hmp), tetra-thio-tungstate, silver sulfide and dysprosium nitrate were self-assembled, forming an anionic [AgWS(4)](n) (n) (-) chain in the title compound, {[Dy(NO(3))(2)(C(6)H(18)N(3)OP)(4)][AgWS(4)]}(n). The central Dy atom in the cation is coordinated by eight O atoms from two didentate nitrate and four hmp ligands, giving rise to a distorted square anti-prismatic...

2016
Tianlei Wang Meitang Liu Hongwen Ma

Layered double hydroxides (LDHs), luminescent π-conjugated anionic polymer and montmorillonite (MMT) were orderly assembled into luminescent multilayer films via layer-by-layer self-assembly method. The electronic microenvironment (EME), the structure of which is like a traditional capacitor, can be constructed by exfoliated LDHs or MMT nanosheets. In addition, the rigid inorganic laminated con...

Journal: :Physical review letters 2001
M Moseler H Häkkinen R N Barnett U Landman

The properties of neutral and anionic Pd(N) clusters were investigated with spin-density-functional calculations. The ground-state structures are three dimensional for N>3 and they are magnetic with a spin triplet for 2 < or = N < or = 7 and a spin nonet for N = 13 neutral clusters. Structural and spin isomers were determined and an anomalous increase of the magnetic moment with temperature is ...

Journal: :Chemical communications 2010
Ahmed Mohamed El-Toni Mohamed Wasi Khan Mohamed Abbas Ibrahim Mohamed Abid Mansour Al-Hoshan Mohamed Al-Salhi

In this communication, we report the fabrication of silica nanospheres with a double mesoporous core-shell structure by a one-templating step two-pot synthesis route using an anionic surfactant.

Journal: :Molecules 2018
E Liu Fangfang Jian

Anionic water clusters have long been studied to infer properties of the bulk hydrated electron. In particular, the question of whether the excess electron is on the surface of the cluster or in the interior of the clusters has been the subject of much speculation. The successes of solid-state physics are built on exploiting the regularity of atomic arrangements in crystal. Describing the cryst...

2014
Rafael Trindade Maia Daniela Nadvorny

The aim of this study was to develop a theoretical model using Anopheles gambiae GSTE2 structure as template for Aedes aegypti GSTE2 by homology modeling Docking simulations were performed for both the enzymes against usnic acid in neutral and anionic forms. Ramachandran plot revealed that 93.9% of the GSTE2 model residues were located on most favored regions. Model evaluation was made by the A...

Journal: :Dalton transactions 2010
Hongzhu Xing Yi Li Tan Su Jin Xu Weiting Yang Enbo Zhu Jihong Yu Ruren Xu

We present the spontaneous crystallization of a new chiral open-framework borophosphate in an ionothermal system. Its structure contains a three-dimensional (3D) anionic framework with intersecting 12-ring channels formed by interweaving helical chains.

آزادبخت, آزاده , دریکوند, زهره ,

9-aminoacridinum acridine-9-carboxylate (1) as a proton transfer ion pair was obtained by the reaction of 9-aminoacridine, acridine-9-carboxylic acid and zinc nitrate (1:1:1 molar ratio) in solvents mixture H2O/MeOH under reflux condition. The crystal structure of this compound was determined by elemental analysis, IR spectroscopy and single crystal X-ray diffraction method. Crystallographic da...

Journal: :Dalton transactions 2010
Chuan-Fu Sun Ting Hu Xiang Xu Jiang-Gao Mao

Systematic explorations of new compounds in the La(3+)-V(4+)/V(5+)-iodate system led to three new lanthanum(III) vanadium iodates, namely, LaVO(IO(3))(5), LaV(2)O(6)(IO(3)), and LaVO(2)(IO(3))(4).H(2)O. LaVO(IO(3))(5) is isostructural with LaTiO(IO(3))(5) and its structure contains a 0D [VO(IO(3))(5)](3-) anionic unit composed of one VO(6) octahedron linked to five IO(3)(-) groups. Such 0D anio...

Journal: :Organic letters 2001
T V Ovaska S E Reisman M A Flynn

[figure: see text] A tandem anionic 5-exo-dig cyclization/Claisen rearrangement sequence was used to effect a facile, "one-pot" conversion of an appropriately substituted 4-alkyn-1-ol to the tetracyclic carbon core structure of phorbol. The synthesis was conducted using readily available nonracemic starting materials to provide the target structure as a single enantiomer in high chemical yield.

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