Materials Literature
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IM5 is a recently discovered zeolite that presents a high hydrothermal stability and, when exchanged with cobalt, shows a high activity for the selective catalytic reduction of NO with propane. The catalytic behavior of a cobalt-exchanged IM5 zeolite is compared with that of a cobalt-exchanged ZSM5 zeolite. The state…
(2,5)-Ene reactions catalyzed by mesoporous solid acids are reported from the mechanistic point of view. The continuum (2,5)-ene mechanism from the concerted to the cationic cyclization followed by 1,2-hydride shift is evaluated. The solid-acid-catalyzed cyclization of the oxonium ion intermediate 4 derived from cycli…
A novel technique, which allows the importance of ion energy in plasma polymer film growth to be investigated, without perturbation of any other plasma parameter (particle densities or temperatures) or, in principle, perturbation of particle (neutral or ion) fluxes is applied in the plasma polymerisation of acrylic ac…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSectorization of a Lamellar Polymer Crystal Studied by Dynamic Monte Carlo SimulationsWenbing Hu, Daan Frenkel, and Vincent B. F. MathotView Author Information FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ A…
A series of silver carboxylates containing unsaturated groups within the ligand have been synthesised [AgO2CR, R = CH2CN (1), H2CCH (3), H2CCHCH2CH2 (5), Me(H)CC(Me) (8), Ph(H)CCH (11)], along with their triphenylphosphine [AgO2CR(PPh3)2, R = CH2CN (2), H2CCH (4), H2CCHCH2CH2 (6), Me(H)CC(Me) (9), Ph(H)CCH (12)] and 1…
A hexadentate ligand LH2 (LH2 = 1,2-bis((3-methoxysalicylidene)amino)ethane) reacts with iron(III) ions to yield a μ-oxo complex (LFe)2O, 1, which may function as a ligand towards gadolinium(III). The resulting product is a tetranuclear complex [LFeGd(NO3)3]2O, 2. Its structure has been determined by single crystal X-…
Homogeneously dispersed bimetallic oxides in nanocrystalline or amorphous forms, of the type MAl2O4 (where M = Mg, Ca, Mn, Co, Fe, and Zn) were prepared from bimetallic oxo-bridged alkoxides [(RO)2Al–O–M–O–Al(OR)2], where the Al–O–M–O–Al bonds were not hydrolytically cleaved. This approach yields hydroxides [(HO)2Al–O…
Layered organic superconductors situated in the vicinity of a superconductor-insulator (SI) phase boundary show switching between the SI bistable states by application of magnetic field. First, we show that an electronic phase of $\ensuremath{\kappa}\ensuremath{-}(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{2}[\mathrm…
Two new noncentrosymmetric (NCS) solids were isolated via high-temperature, salt-inclusion reactions, Cs(2)Cu(7)(P(2)O(7))(4).6CsCl (1, CU-9) and Cs(2)Cu(5)(P(2)O(7))(3).3CsCl (2, CU-11). These copper(II) phosphates exhibit novel open-framework structures conceptually templated by extended Cs-Cl salt. The latter resid…
Only about half of non-membrane-bound proteins encoded by either bacterial or archaeal genomes are soluble when expressed in Escherichia coli (Yee et al., Proc Natl Acad Sci USA 2002;99:1825-1830; Christendat et al., Prog Biophys Mol Biol 200;73:339-345). This property limits genome-scale functional and structural pro…
The controlled colour generation and colour erasing phenomena of alkylammonium polyoxomolybdate complexes were first observed in the trans-(1R,2R)-1,2-bis(undecylcarbonylamino)cyclohexane organogel system using the sol-gel phase transition.
Static lattice simulation techniques were used to calculate the energetics of intrinsic defect generation, impurity incorporation and cation migration in the perovskite oxide LaGaO3. The calculations indicate that the formation of cation vacancies is energetically favoured over the formation of cation interstitials; e…
Structural analyses have been undertaken with the monoclinic and orthorhombic crystalline structures of polyester 4 6. X-ray diffraction patterns performed at 50 °C and electron diffraction patterns from single crystals, solution-grown films, and epitaxial crystallizations have been considered. Skew CH 2 CH 2 −OC(O) b…
The synthesis of a double-cavity porphyrin with interesting allosteric binding properties toward viologens (N,N'-disubstituted 4,4'-bipyridines) is described. The porphyrin host forms very strong 1:2 complexes with viologens, displaying a negative allosteric behavior. The first viologen guest binds exceptionally tight…
Oxochromium(V) complexes of 5,10,15-tris(pentafluorophenyl)corrole and brominated derivatives oxygenate substrates (triphenylphosphine and norbornene) with concomitant production of chromium(III). Regeneration of CrVO by reaction of dioxygen with CrIII completes an aerobic catalytic cycle, with very large solvent effe…
The first fluorescent styryl dye library with a broad color range was synthesized by combinatorial condensation of various aldehydes and methyl pyridinium compounds, and their applications as organelle specific staining probes were demonstrated.
Statistical properties of the critical current distribution in superconductor with fractal clusters of a normal phase are considered. It is found that there is the range of fractal dimensions in which the variance and expectation for this distribution increases infinitely. Simple technique of avoiding such a divergenc…
In our preceding serial works, we have investigated the generation of higher-order atomic dipole squeezing (HOADS) in a high-Q micromaser cavity, discussing the effects of dynamic Stark shift, atomic damping, atomic coherence and nonlinear one-photon processes and different initial states (for example, correlated and…
Two-mode quantized electromagnetic fields can be entangled and admit a large number of coherent states. In this paper, we consider a two-mode system that consists of a two-level atom interacting with a two-mode quantized electromagnetic field, which is initially prepared in an entangled two-mode coherent state, via a…
Monodisperse silver nanowires with high aspect ratio are prepared via electrochemical plating into monodomain porous alumina templates. The nanowires have a length of 30 μm or more, adjustable uniform diameters ranging between 180 and 400 nm, and a monodispersity of about 2%. The templates were fabricated by anodizati…