Materials Literature
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Methanol adsorption has been studied by IR spectroscopy on unreduced, microporous and non-microporous ceria samples presenting different surface areas. The spectra were assigned according to whether the so-formed methoxy species were on-top, doubly or triply bridged to cationic surface sites. Apparent molar absorption…
Poly(aniline)–poly(vinylsulfonate) composite-coated glassy carbon electrodes are found to give stable and reproducible electrocatlytic responses to NAD(P)H in citrate–phosphate buffer at pH 7. Analysis of these amperometric responses as a function of NAD(P)H concentration, film thickness, electrode potential and rotat…
The synthetic and structural chemistry as well as some physical and chemical properties of cyanide-bridged complexes containing two or more metal building blocks are discussed. Emphasis is laid on molecular shape and design and their consequences, including the effects of cyanide–isocyanide isomerism. Redox phenomena…
During recycling of chemical pulps, deterioration of pulp properties occurs due to hornification. This phenomenon is caused by irreversible structural changes taking place during drying. In this work. the role of pulp hemicelluloses in the hornification process of kraft pulps produced by different cooking and bleachin…
The hexadentate N 6 -donor podand tris[3-(2-pyridyl)pyrazolyl]hydroborate (Tp Py ) contains 2-pyridyl fragments attached to the pyrazolyl C 3 -positions such that each arm is a bidentate chelate. Three series of lanthanide(III) complexes were prepared: [M(Tp Py )(MeOH) 2 F][PF 6 ] (series A ), [M(Tp Py )(NO 3 ) 2 ] (s…
The crystal structure of κ-alumina (κ-Al 2 O 3 ) has been determined ab initio from an X-ray powder diffraction pattern (reliability factors: R Bragg =0.046, R p =0.090, R wp =0.115, χ 2 =11.7). The acentric structure (orthorhombic system, space group Pna2 1 , a=4.8437(2) Å, b=8.3300(3) Å, c=8.9547(4) Å, Z=8) is built…
Hydrothermal reactions of Na 2 MoO 4 ·2H 2 O and MoO 3 with MCl 2 ·xH 2 O (M = Co, Ni, Cu) and 2,2′-bipyridine yield one- and two-dimensional solids, characterized by molybdenum oxide monomers, clusters and chains linked by {M(2,2′-bpy)} 2+ groups and represented by the formulae [M(bpy) x - (H 2 O) y Mo n O 3n +1 ] (n…
Reversible photoinduced magnetization was observed in a cobalt iron cyanide thin film. Magnetic properties of the prussian blue analog, K 0.4 Co 1.3 [ Fe ( CN ) 6 ] ⋅ 5 H 2 O , can be switched between ferrimagnetic and paramagnetic by visible and near‐IR light illumination. The critical temperature after illumination…
Parent aniline oligomers such as tetramer and “16-mer” have been synthesized by a general method. This method can be used to synthesize other oligomers by selecting appropriate ratios of reactants and appropriate oxidants. The oligomers were characterized by UV/Vis, IR, NMR, mass spectroscopy, GPC and elemental analys…
Using a molecular-dynamics computer simulation we determine the temperature dependence of the partial structure factors for a binary Lennard-Jones system. These structure factors are used as input data to solve numerically the wave-vector-dependent mode-coupling equations in the long-time limit. Using the so-determine…
Volume 20 provides insights on how to improve products and reduce costs by leveraging materials technology in the context of engineering design. It begins with a review of best design practices, identifying roles and responsibilities, workflows and tools, and considerations such as industry standards and codes, enviro…
In the last two decades, a significant effort has been directed to understand the internal charge distributions in dielectrics. This has resulted in the development of a number of methods which give detailed information about space charge distributions. This review presents the evolution of several experimental approa…
A set of principles are outlined for the design of short oligopeptides which will self-assemble in appropriate solvents into long, semi-flexible, polymericβ-sheet nanotapes. Their validity is demonstrated by experimental studies of an 11-residue peptide (DN1) which forms nanotapes in water, and a 24-residue peptide (K…
Alkanethiol molecules containing a polar aromatic group (C 22 H 45 −SO 2 −C 6 H 4 −O−C 4 H 8 −SH) were used to stabilize gold clusters, formed in a two-phase system ( J. Chem. Soc., Chem. Commun. 1994, 801). The gold nanoparticles were investigated using TEM, FTIR, UV/vis and X-ray photoelectron spectroscopy and compa…
Giant Magneto-Impedance (GMI) of films with a layered structure has been studied. They are Co-Si-B/Cu/Co-Si-B, Co-Si-B/Ag/Co-Si-B, and Fe-Co-Si-B/Cu/Fe-Co-Si-B with a magnetic closed-loop structure. They also have a certain magnetic configuration, for which the uniaxial anisotropy is perpendicular to both the driving…
The exchange coupling between the unpaired electrons of divalent first-row transition-metal ions M II (M = Cu, Ni, Co or Mn) bridged by the terephthalate (ta) ligand (intramolecular metal–metal separation ca. 10 Å) has been systematically studied. The following complexes have been synthesized: [Cu 2 (bipy) 4 (ta)][ClO…
The miscibility of poly(4-vinylphenol) (PVPh) and poly(methyl methacrylate) (PMMA) blends has been investigated by FTIR and FT-Raman spectroscopy. Although both techniques provide evidence for the formation of hydrogen bonds between the hydroxyl group of PVPh and the ester group of PMMA, the blends show only a limited…
The decomposition of formic acid on the TiO 2 (110) surface was examined with temperature-programmed desorption (TPD), static secondary ion mass spectrometry (SSIMS), and high-resolution electron energy loss spectroscopy (HREELS). Formic acid decomposed upon adsorption on TiO 2 (110) at 110 K to formate and a proton.…
Cu(II) was used as a probe to investigate the structure and ion binding ability of full-generation poly(amidoamine) starburst dendrimers ( n SBDs). Computer-aided analysis of the EPR spectra provided information on the formation of copper complexes in various internal or external locations of the dendrimers, as well a…
The synthesis, characterization, and vis−NIR−IR vapochromic/spectroscopic studies are reported for isocyanide compounds of the form [Pt(arylisocyanide) 4 ][Pt(CN) 4 ] (where arylisocyanide = p -CNC 6 H 4 C n H 2 n +1; n = 1, 6, 10, 12, 14). The dark blue, solid materials change color in the NIR (near-infrared) spectra…