A bimetallic pillared-layer metal–organic coordination framework with a 3D biporous structure

2009 ◽  
pp. 4426 ◽  
Author(s):  
Tapas Kumar Maji ◽  
Suchetan Pal ◽  
K. L Gurunatha ◽  
A. Govindaraj ◽  
C. N. R. Rao
Keyword(s):  
Metal Organic ◽  
Coordination Framework ◽  
Biporous Structure

A bracket approach to improve the stability and gas sorption performance of a metal–organic framework via in situ incorporating the size-matching molecular building blocks

2016 ◽  
Vol 52 (54) ◽  
pp. 8413-8416 ◽  
Author(s):  
Di-Ming Chen ◽  
Jia-Yue Tian ◽  
Chun-Sen Liu ◽  
Miao Du
Keyword(s):  
Metal Organic Framework ◽  
Building Blocks ◽  
Gas Sorption ◽  
Molecular Building Blocks ◽  
Metal Organic ◽  
Coordination Framework ◽  
The Stability ◽  
Organic Framework

The robustness and gas sorption performance of a coordination framework can be greatly improved by incorporating size-matching molecular building blocks.

Construction of CuII Cluster-Based Magnetic Metal–Organic Framework Derived from a V-Shaped Aromatic Dicarboxylate Ligand

2015 ◽  
Vol 68 (3) ◽  
pp. 416 ◽  
Author(s):  
Yong-Qiang Chen ◽  
Yuan Tian ◽  
Jun Li
Keyword(s):  
Rational Design ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
X Ray ◽  
Magnetic Metal ◽  
Metal Organic ◽  
Coordination Framework ◽  
Systematic Synthesis

In our efforts towards rational design and systematic synthesis of cluster-based metal–organic frameworks, a new CuII coordination framework derived from the V-shaped aromatic dicarboxylate with formula [Cu4(µ4-O)(L)3]∞ (1), H2L = (4-phenyl)-2,6-bis(4-carboxyphenyl)pyridine) was synthesised under hydrothermal conditions and structurally characterised by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, and infrared spectroscopy. Structure analysis shows that complex 1 has a three-dimensional framework based on [Cu8] cluster with 8-connected bcu topology. Magnetic investigation suggests that anti-ferromagnetic coupling exists between CuII ions in the [Cu8] cluster.

scholarly journals Crystal structure of a low-spin poly[di-μ3-cyanido-di-μ2-cyanido-bis(μ2-2-ethylpyrazine)dicopper(I)iron(II)]

2019 ◽  
Vol 75 (8) ◽  
pp. 1205-1208
Author(s):  
Sofiia V. Partsevska ◽  
Dina D. Naumova ◽  
Igor P. Matushko ◽  
Olesia I. Kucheriv ◽  
Il'ya A. Gural'skiy
Keyword(s):  
Crystal Structure ◽  
Metal Organic Framework ◽  
Three Dimensional ◽  
Tetrahedral Coordination ◽  
Common Edge ◽  
Coordination Environment ◽  
Metal Organic ◽  
Coordination Framework ◽  
Organic Framework

In the title metal–organic framework, [Fe(C6H8N2)2{Cu(CN)2}2] n , the low-spin FeII ion lies at an inversion centre and displays an elongated octahedral [FeN6] coordination environment. The axial positions are occupied by two symmetry-related bridging 2-ethylpyrazine ligands, while the equatorial positions are occupied by four N atoms of two pairs of symmetry-related cyanide groups. The CuI centre is coordinated by three cyanide carbon atoms and one N atom of a bridging 2-ethylpyrazine molecule, which form a tetrahedral coordination environment. Two neighbouring Cu atoms have a short Cu...Cu contact [2.4662 (7) Å] and their coordination tetrahedra are connected through a common edge between two C atoms of cyanide groups. Each Cu2(CN)2 unit, formed by two neighbouring Cu atoms bridged by two carbons from a pair of μ-CN groups, is connected to six FeII centres via two bridging 2-ethylpyrazine molecules and four cyanide groups, resulting in the formation of a polymeric three-dimensional metal–organic coordination framework.

A Dynamically Nanoporous Metal-Organic Framework Functional Properties

2011 ◽  
Vol 239-242 ◽  
pp. 3150-3155 ◽  
Author(s):  
Xing Huang ◽  
Li Jun Jiang ◽  
Mao Lin Hu ◽  
Xin Hua Li
Keyword(s):  
Metal Organic Framework ◽  
Exchange Interactions ◽  
Gas Storage ◽  
Magnetic Exchange ◽  
X Ray ◽  
Crystal Transformation ◽  
Nanoporous Metal ◽  
Metal Organic ◽  
Coordination Framework ◽  
Single Crystal Analysis

3D nanoporous coordination framework [Ni2(nic)4(H2O)]n(nic=Nicotinic acid) was obtained hydrothermally from a mixture of NiCl2.6H2O and 3-cyanopyridine. X-ray single crystal analysis revealed that it consists of “mushroom-shaped” channels along a axis suitable for gas storage. N2-adsorption studies at 77 K revealed a Langmuir surface area of 200 m2/g and a pore volume of 0.12 cm3/g. The compound shows dynamic dehydration and rehydration behaviors with the formation of 0D coordination [Ni(nic)2(H2O)4], accompanied by crystal-to-crystal transformation. The structural transformation significantly changes the character of magnetic exchange interactions and gas storage.

scholarly journals Crystal structure of catena-poly[[[(2-ethoxypyrazine-κN)copper(I)]-di-μ2-cyanido] [copper(I)-μ2-cyanido]]

2019 ◽  
Vol 75 (11) ◽  
pp. 1797-1800
Author(s):  
Sofiia V. Partsevska ◽  
Valerii Y. Sirenko ◽  
Kateryna V. Terebilenko ◽  
Sergey O. Malinkin ◽  
Il'ya A. Gural'skiy
Keyword(s):  
Polymeric Chain ◽  
Coordination Geometry ◽  
Asymmetric Unit ◽  
Polymeric Chains ◽  
Metal Organic ◽  
Coordination Framework ◽  
Type C ◽  
C And N ◽  
Cyanide Ligands ◽  
Cyano Groups

In the asymmetric unit of the title coordination compound, {[Cu(CN)(C4H3OC2H5N2)][Cu(CN)]} n , there are two Cu atoms with different coordination environments. One CuI ion is coordinated in a triangular coordination geometry by the N atom of the 2-ethoxypyrazine molecule and by two bridging cyanide ligands, equally disordered over two sites exchanging C and N atoms, thus forming polymeric chains parallel to the c axis. The other Cu atom is connected to two bridging cyanide groups disordered over two sites with an occupancy of 0.5 for each C and N atom, and forming an almost linear polymeric chain parallel to the b axis. In the crystal, the two types of chain, which are orthogonal to each other, are connected by cuprophilic Cu...Cu interactions [2.7958 (13) Å], forming two-dimensional metal–organic coordination layers parallel to the bc plane. The coordination framework is further stabilized by weak long-range (electrostatic type) C—H...π interactions between cyano groups and 2-ethoxypyrazine rings.

CFA-18: a homochiral metal–organic framework (MOF) constructed from rigid enantiopure bistriazolate linker molecules

2020 ◽  
Vol 49 (44) ◽  
pp. 15758-15768
Author(s):  
Katharina Knippen ◽  
Björn Bredenkötter ◽  
Lisa Kanschat ◽  
Maryana Kraft ◽  
Tom Vermeyen ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic ◽  
Coordination Framework ◽  
Linker Molecules ◽  
Organic Framework

In this work, we introduce a novel enantiopure chiral spiro bistriazolate linker molecule (H2-bibta) and the corresponding first enantiopure bistriazolate-based metal–organic framework, CFA-18 (Coordination Framework Augsburg-18).

A channel-type mesoporous In(iii)–carboxylate coordination framework with high physicochemical stability for use as an electrode material in supercapacitors

2014 ◽  
Vol 2 (25) ◽  
pp. 9828-9834 ◽  
Author(s):  
Miao Du ◽  
Min Chen ◽  
Xiao-Gang Yang ◽  
Jiong Wen ◽  
Xi Wang ◽  
...  
Keyword(s):  
Electrode Material ◽  
Metal Organic Framework ◽  
Promising Candidate ◽  
Physicochemical Stability ◽  
Metal Organic ◽  
Coordination Framework ◽  
Mesoporous Metal ◽  
Channel Type ◽  
Organic Framework

A mesoporous metal–organic framework with perfect 1-D hexagonal channels and high physicochemical stability represents a promising candidate for use as an electrode material in supercapacitors.

Electron microscope characterization of MOCVD-grown gap layers on Si

1986 ◽  
Vol 44 ◽  
pp. 724-725
Author(s):  
K.M. Jones ◽  
M.M. Al-Jassim ◽  
J.M. Olson
Keyword(s):  
Atmospheric Pressure ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Organic Chemical ◽  
Lattice Match ◽  
Si Substrates ◽  
Metal Organic ◽  
Good Lattice ◽  
Antiphase Domains

The epitaxial growth of III-V semiconductors on Si for integrated optoelectronic applications is currently of great interest. GaP, with a lattice constant close to that of Si, is an attractive buffer between Si and, for example, GaAsP. In spite of the good lattice match, the growth of device quality GaP on Si is not without difficulty. The formation of antiphase domains, the difficulty in cleaning the Si substrates prior to growth, and the poor layer morphology are some of the problems encountered. In this work, the structural perfection of GaP layers was investigated as a function of several process variables including growth rate and temperature, and Si substrate orientation. The GaP layers were grown in an atmospheric pressure metal organic chemical vapour deposition (MOCVD) system using trimethylgallium and phosphine in H2. The Si substrates orientations used were (100), 2° off (100) towards (110), (111) and (211).

Structural and electronic properties of defects in semiconductors

1995 ◽  
Vol 53 ◽  
pp. 4-5
Author(s):  
J.L. Batstone
Keyword(s):  
Semiconductor Device ◽  
Chemical Vapor ◽  
Misfit Strain ◽  
Organic Chemical ◽  
Extended Defects ◽  
Transmission Electron ◽  
Semiconductor Thin Films ◽  
Wide Range ◽  
Metal Organic ◽  
Film Substrate

The development of growth techniques such as metal organic chemical vapor deposition (MOCVD) and molecular beam epitaxy during the last fifteen years has resulted in the growth of high quality epitaxial semiconductor thin films for the semiconductor device industry. The III-V and II-VI semiconductors exhibit a wide range of fundamental band gap energies, enabling the fabrication of sophisticated optoelectronic devices such as lasers and electroluminescent displays. However, the radiative efficiency of such devices is strongly affected by the presence of optically and electrically active defects within the epitaxial layer; thus an understanding of factors influencing the defect densities is required.Extended defects such as dislocations, twins, stacking faults and grain boundaries can occur during epitaxial growth to relieve the misfit strain that builds up. Such defects can nucleate either at surfaces or thin film/substrate interfaces and the growth and nucleation events can be determined by in situ transmission electron microscopy (TEM).

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