A5069363595- Polyoxometalates: Synthesis and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Carbon dioxide utilization in catalysis
- Vanadium and Halogenation Chemistry
- Chemical Synthesis and Reactions
- Magnetism in coordination complexes
- Crystal structures of chemical compounds
- Organometallic Complex Synthesis and Catalysis
- Metalloenzymes and iron-sulfur proteins
- Crystallography and molecular interactions
- Catalytic Cross-Coupling Reactions
- Noise Effects and Management
- Metal complexes synthesis and properties
- Lanthanide and Transition Metal Complexes
- Advanced machining processes and optimization
- Tunneling and Rock Mechanics
- Aerosol Filtration and Electrostatic Precipitation
- Air Quality and Health Impacts
- Diamond and Carbon-based Materials Research
- Vehicle emissions and performance
- Aerodynamics and Fluid Dynamics Research
- CRISPR and Genetic Engineering
- Catalytic C–H Functionalization Methods
Tsinghua University
2001-2023
Sichuan University
2023
Université Paris-Sud
2007
Université Paris Cité
2007
Laboratoire de Chimie Physique
2007
Centre National de la Recherche Scientifique
2007
Zhejiang University
2004
In this communication, we demonstrate that polyoxomolybdates can activate sp3 C−H bonds in aliphatic amines. Unexpectedly, a carbon−carbon double bond is formed from two primary amines via the activation and dehydrogenative coupling of near nitrogen atom bearing hexamolybdate. Detailed experiments including 1H NMR, 13C IR, UV−vis, ESI-MS, especially X-ray single-crystal diffraction substantially confirm existence class so-resulting organic−inorganic hybrid molecules, which are made up...
Building bridges: Two arylimido derivatives of hexamolybdate, containing unprecedented bridging imido ligands, have been synthesized and structurally characterized. Their 1H NMR UV/Vis spectra distinguish them from related terminally coordinated derivatives. Such compounds extend the range organoimido polyoxometalate coordination chemistry, providing insight into mechanism oxo metathesis in Lindqvist polymolybdate. Supporting information for this article is available on WWW under...
Abstract Organically derivatised polyoxometalate (POM) clusters containing bromo or iodo groups can undergo ligand‐free, Pd‐catalysed Heck carbon–carbon coupling reactions with alkenes, bromomagnesium phenylamide as a base (see scheme). This protocol offers new route to organic–inorganic hybrid molecular materials in which POM are covalently bonded organic conjugated segments. magnified image
[(n-C4H9)4N]2[Mo6O18(N-1-C10H6-2-CH3)] (1) has been prepared by the reaction of 1-amino-2-methylnaphthalene hydrochloride with [(n-C4H9)4N]4[α-Mo8O26] in presence 1,3-dicyclohexylcarbodiimide. Three solvent-free crystalline phases are isolated from mixed solvents acetone and acetic ether. The X-ray single-crystal structures three have determined, showing packing supramolecular assembly characters (pseudohigher symmetry, helical chains, π−π stacking) which effect solvent polarity...
POMegranate esterification: The above phenolic hydroxyl functionalized organoimido polyoxometalate (POM) undergoes esterification reaction with carboxylic acids in the presence of dicyclohexylcarbodiimide (DCC), to form POM-functionalized esters, providing a convenient and efficient route prepare POM-based organic/inorganic hybrid materials.
Zwei Arylimidoderivate von Hexamolybdat mit bislang unbekannten Imido-Brückenliganden wurden synthetisiert und strukturanalytisch charakterisiert. Die Verbindungen unterscheiden sich in den 1H-NMR- UV/Vis-Spektren Derivaten endständigen Liganden könnten Einblicke Mechanismus der Oxometathese bei Lindqvist-Polymolybdaten liefern. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2001/2008/z704546_s.pdf or from author. Please note: The...
Monofunctionalized alkylimido derivatives of hexamolybdate, (Bu4N)2[Mo6O18(≡N–R)] (R = methyl, Me; ethyl, Et; n-propyl, n-Pr; i-propyl, i-Pr; n-butyl, n-Bu; t-butyl, t-Bu; cyclohexyl, Cy; n-hexyl, Hex; and n-octadecyl, Ode), have been prepared in high purity good yield by the reaction [Bu4N]4[α-Mo8O26] with appropriate aliphatic amine hydrochlorides anhydrous acetonitrile, using N,N′-dicyclohexylcarbodiimide (DCC) as dehydrating agent. Eight compounds determined single crystal X-ray...
In the title dinuclear complex, [Mo2(C6H8N3O2)2O4]·3H2O, Mo atoms, bridged by two μ-oxo have a distorted octahedral coordination environment. Besides bridging O of each atom is completed terminal oxo and tridentate histidinate ligand. The short Mo⋯Mo distance 2.5458 (4) Å may indicate existence an Mo—Mo metal bond. Intermolecular hydrogen bonding between uncoordinated carboxylate atoms amino groups leads to layer-like arrangement molecules. water molecules link these layers via O—H⋯O...
The title salt, (C4H12N2)2[Bi2Cl10]·3H2O, was prepared by reaction of bismuth trichloride and piperazine in a hydrochloric acid medium. It consists piperazinium dications dimeric [Bi2Cl10]4− tetraanions, the latter with twofold rotation symmetry, together water crystallization. Hydrogen-bond interactions, including N—H⋯O, N—H⋯Cl O—H⋯Cl stabilize crystal structure.
The title compound, C15H17ClO, was synthesized directly from the condensation of cyclooctanone with 4-chlorobenzaldehyde, catalysed effectively by improved nanostructured Ni–B cluster in presence trimethylsilyl chloride (TMSCl). eight-membered ring adopts a boat–chair conformation. packing molecules crystal structure is determined mainly C—H⋯O hydrogen bonds, together C—H⋯π interactions and weak π–π stacking interactions.
In the subway system, a high concentration of iron particles can cause significant damage to human health, and magnetic filters that efficiently filter out have attracted considerable attention recently. Therefore, it is both urgent important study influencing factors for improving filtration efficiency reducing resistance. this paper, establish model filters, flow field, field particle tracking are calculated in three steps. After force analysis particles, be concluded module needs only...
The title compound, (C16H36N)2[Pd2Br6], was prepared from palladium(II) bromide and tetrabutylammonium bromide. In the anion, terminal bridging Pd—Br bond lengths lie in ranges 2.3982 (9)–2.4185 (8) 2.4389 (7)–2.4513 (7) Å, respectively. anion can be viewed as a dimeric cluster consiting of two edge-sharing PdBr4 square units, which make dihedral angle 7.84 (4)°.