Hydrogenations of CO or CO2 are important catalytic reactions as they interesting alternatives to produce fine chemical feedstock hence avoiding the use fossil sources. Using monodisperse nanoparticle (NP) catalysts, we have studied CO/H2 (i.e., Fischer-Tropsch synthesis) and CO2/H2 reactions. Exploiting synchrotron based in situ characterization techniques such XANES XPS, were able demonstrate that 10 nm Co NPs cannot be reduced at 250 °C while supported on TiO2 SiO2 complete reduction...

Carbon dioxide capture and use as a carbon feedstock presents both environmental industrial benefits. Here we report the discovery of hybrid oxide catalyst comprising manganese nanoparticles supported on mesoporous spinel cobalt oxide, which catalyses conversion to methanol at high yields. In addition, carbon–carbon bond formation is observed through production ethylene. We document existence an active interface between surface layers by using X-ray absorption spectroscopy electron...

The development of zeolite-like structures with extra-large pores (>12-membered rings, 12R) has been sporadic and is currently at 30R. In general, templating via molecules leads to crystalline frameworks, whereas the use organized assemblies that permit much larger produces noncrystalline frameworks. Synthetic methods generate crystallinity from both discrete templates represent a viable design strategy for developing porous inorganic frameworks spanning micro meso regimes. We show by...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXT[Ga2(DETA)(PO4)2]·2H2O (DETA = Diethylenetriamine): A Novel Porous Gallium Phosphate Containing 24-Ring ChannelsChia-Her Lin, Sue-Lein Wang, and Kwang-Hwa LiiView Author Information Department of Chemistry, National Tsing-Hua University Hsinchu, Taiwan, R.O.C. Central Chungli, Institute Academia Sinica Nankang, Taipei, Cite this: J. Am. Chem. Soc. 2001, 123, 19, 4649–4650Publication Date (Web):April 24, 2001Publication History Received4...

The first 26R channel structure, NTHU-5, built up with two types of helical metal phosphite chains has been synthesized under mild hydrothermal conditions; this novel open framework is composed both octahedral Al3+ and tetrahedral Zn2+ centers represents the example participation aluminum in a pore size over 20R; truly stack 26-membered rings instead just an opening; study successfully demonstrated that differently charged ions can form M−O−P−O−M' bonded structure ring larger than any other...

We report the first example of pentavalent−uranium silicate synthesized by a high-temperature, high-pressure hydrothermal method. The 3-D framework consists four-membered single rings corner-sharing SiO4 tetrahedra and 1-D UO4/1O2/2 chains. Magnetic susceptibility XPS were measured to identify valence state uranium.

The first mixed-valence uranium(IV,V) silicate is synthesized under high-temperature, high-pressure hydrothermal conditions. structure contains chains of corner-sharing U(IV,V)O(6) octahedra which are interconnected by Si(4)O(12) four-membered rings to form a 3-D framework. XPS and XANES spectra were measured identify the valence state uranium.

The combination of 4,4′-bipyridine (4,4′-bpy) and oxalate ligands has resulted in the formation two novel layered compounds [Fe3(C2O4)3(4,4′-bpy)4] 1 [Co(C2O4)(4,4′-bpy)] 2. Both exhibit two-dimensional layer structures. That consists iron(II) chains, with terminal bridging 4,4′-bpy stacking alternately between chains. structure 2 contains linear chains cobalt(II) which are cross-linked by molecules a perpendicular manner, leading to square grid sheets rectangular windows. Magnetic...

Two new cobalt phosphates, [Co(3)(pyz)(HPO(4))(2)F(2)] (1) and [Co(3)(4,4'-bpy)(HPO(4))(2)F(2)].xH(2)O (x approximately 0.7) (2), have been synthesized by hydrothermal methods in the presence of aromatic amines, characterized single-crystal X-ray diffraction magnetic susceptibility. Their structures consist neutral sheets fluorinated phosphate which are pillared through pyrazine 4,4'-bipyridine molecules to form 3D frameworks. The related that mineral lazulite. Both compounds show long-range...

An unusual mix: The first mixed-valence uranium(V,VI) germanates are synthesized under hydrothermal conditions. structure of A3(U2O4)(Ge2O7) (A=Rb, Cs) contains chains corner-sharing U5+O6 octahedra (purple) and U6+O6 tetragonal bipyramids (yellow), which interconnected by GeO4 tetrahedra (green) to form a 3D framework (see picture; A blue). Detailed facts importance specialist readers published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They...

A novel organic-inorganic hybrid nickel molybdenum(V) phosphate has been synthesized hydrothermally and characterized by single-crystal X-ray diffraction, thermogravimetric analysis, magnetic susceptibility. The structure consists of poly(oxomolybdophosphate) anions linked both Ni(II) cations 4,4-bipyridine bridging ligands to form a three-dimensional open-framework with large cavities where the uncoordinated 4,4'-bipyridinium lattice water molecules are located. This is first example an...

A new uranium(V) silicate, K3(U3O6)(Si2O7), and the germanate analogue, Rb3(U3O6)(Ge2O7), have been synthesized under high-temperature, high-pressure hydrothermal conditions characterized by single-crystal X-ray diffraction. Their structures contain uranate columns formed of triple octahedral chains alpha-UF5 type linked disilicate (or digermanate) units to form a 3-D framework structure. The valence state uranium is confirmed photoelectron spectroscopy, absorption magnetic susceptibility.

For U′r eyes only: A mixed-valence uranium silicate containing three different valence states of has been synthesized under high-temperature, high-pressure hydrothermal conditions. The structure contains sheets with uranophane anion topology that are connected by UO6 octahedra to form a 2D layered Na+ ions within and between the layers.

A uranium(IV) silicate has been synthesized under high-temperature, high-pressure hydrothermal conditions. The structure consists of unbranched dreier single layers with the composition [Si(2)O(5)] that are connected by UO(6) octahedra to form a 3D framework 7-ring channels where Cs(+) cations located. Each octahedron spans four neighboring chains and, therefore, introduces high degree corrugation in layers. U 4f X-ray photoelectron spectroscopy spectrum was measured confirm valence state...

Abstract Three new benzothieno[3,2‐ b ]thiophene ( BTT ; 1 ) derivatives, which were end‐functionalized with phenyl BTT‐P 2 ), benzothiophenyl BTT‐BT 3 and ]thiophenyl groups BBTT 4 dimer of synthesized characterized in organic thin‐film transistors (OTFTs). A improved synthetic method for s was developed, enabled the efficient realization ‐based semiconductors. The crystal structure determined by single‐crystal X‐ray diffraction. Within this family, , had largest conjugation derivatives...

Crystals of a uranyl-europium germanate, K4[(UO2)Eu2(Ge2O7)2], have been grown at high temperature from KF-MoO3 flux and structurally characterized by single-crystal X-ray diffraction. The structure contains PaCl5-type chains formed edge-sharing EuO7 pentagonal bipyramids that are connected digermanate groups such layers europium germanate formed. Neighboring further linked UO6 tetragonal through uranyl ion oxygen atoms to generate 3D framework with 6-ring channels where the K(+) cations...

Hydrothermal treatment of FeCl2·4H2O (or FeCl3·6H2O) and piperazine 2-methylpiperazine) with H3PO4 H2C2O4 in H2O yields two organically templated compounds. The 3-D frameworks are constructed from FeII−O FeIII−O) polyhedra different ligands, phosphate oxalate, both coordinated to the iron atoms. structure FeIII compound is shown.

Two piperazine-templated iron phosphates, (C4H12N2)[Fe4(OH)2(HPO4)5] (1) and (C4H11N2)0.5[Fe3(HPO4)2(PO4)(H2O)] (2), have been synthesized under solvothermal conditions characterized by single-crystal X-ray diffraction, Mössbauer spectroscopy, thermogravimetric analysis. Compound 1 crystallizes in the monoclinic space group C2/m (no. 12) with a = 25.706(3), b 6.4492(6), c 6.3790(6) Å, β 102.601(2)°, V 1032.0(3) Å3 Z 2. The 3-D framework structure consists of layers phosphate which are...

A new uranium(VI) silicate, K5(UO2)2[Si4O12(OH)], has been synthesized by a high-temperature, high-pressure hydrothermal method. It crystallizes in the orthorhombic space group Pbcm (No. 57) with = 13.1274(7) A, b 12.2635(7) c 22.233(1) and Z= 8. Its structure consists of unbranched chains four silicate tetrahedra extending along axis linked together via corner-sharing UO6 tetragonal bipyramids to form 3-D framework, which delimits intersecting channels axes accommodate K+ cations. hydrogen...