Materials Literature
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The electronic absorption of Michler’s ketone (MK) and related push–pull sensitisers undergoes a strong red shift upon coordination with lanthanide(III) β-diketonates, which enables unprecedently efficient sensitisation of Eu3+ luminescence for excitation at long wavelengths extending well into the visible region to a…
is one of only a few ternary oxides which are known to form in the orthorhombic Pmmn structure. The layered structure, favored for application as a -insertion electrode, is found in many other alkali transition metal oxides. We find that the the strong antiferromagnetic interactions between ions contribute to the stab…
We have studied the frustration between ferro- and antiferro-electricity in chiral smectic C like liquid crystalline phases, which is not only fundamentally interesting but also very attractive from an application point of view. It causes temperature induced successive phase transitions as characterized by a devil's s…
The temperature of a fluid can be measured through a variation of the fluorescence emission intensity of a naphthalene fragment covalently linked to a NiII tetraaza-macrocyclic complex, which undergoes a temperature dependent spin interconversion equilibrium.
Spherical particles of mesoporous MSU-X silica in the micrometric size range have been obtained through a new double step process that led to an easy and highly reproducible synthesis pathway giving micelle templated structures with a large surface area and narrow pore size distribution
This paper describes the potential suitability of a new family of concrete mixtures for use in protective structures. Two very‐high‐strength concrete mixtures are discussed and experimental results of penetration studies on one of these are presented. The results are compared to penetration‐study results of other, mor…
The reaction of a slurry of V2O5 with LiOH·H2O and hydrazinium sulfate gives a dark colored solution that upon treatment with ZnSO4·7H2O yields the novel framework material (N2H5)2[Zn3VIV12VV6O42(SO4)(H2O)12]·24H2O, composed of three-dimensional arrays of the mixed-valence {V18O42(SO4)} clusters interlinked via {Zn(H2…
This paper reports attempts to obtain (anti)ferroelectric switchable achiral banana-shaped molecules without Schiff's base units. For this purpose we have synthesized novel V-shaped molecules consisting of rigid angular central units [1,3-disubstituted benzene, 2,7-disubstituted naphthalene, 1,3-diphenylbenzene, 2,6-d…
This article is dedicated to reviewing the recent inelastic x-ray scattering (IXS) work on the high-frequency collective dynamics in liquid water. The results obtained with the IXS technique are directly compared with existing ones from inelastic neutron scattering (INS) and molecular dynamics simulation investigation…
This article describes the use of nematic liquid crystals in the Twisted Nematic Liquid Crystal Display (TN-LCD) since the large majority of instruments manufactured currently incorporating a liquid crystal display (LCD) utilise this type of device. The correlation between the electro-optical performance of these devi…
Temperature Rising Elution Fractionation (C. Fonseca I. Harrison). Temperature Rising Elution Fractionation (J. Soares A. Hamielec). Field Flow Fractionation (J. Janca). Static and Dynamic Light Scattering (G. Berry P. Cotts). Neutron Reflection Studies of Polymers (D. Bucknall). Neutron Scattering Studies of Polymer…
The physical and molecular biological bases of the reactions of cells to features of the topography of the substratum or environment on which and in which cells live, both in culture and in the embryo, are discussed. The fact that most, if not all, cells react to micrometric and nanometric topography is stressed. Some…
The aggregation in water of the free bases and the diprotonated forms of p-sulfonatophenyl and phenyl meso-substituted porphyrins [sodium salts of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS4), 5,10,15-tris(4-sulfonatophenyl)-20-phenylporphyrin (TPPS3), 5,10-bis(4-sulfonatophenyl)-15,20-diphenylporphyrin (TP…
Abstract Pillaring is a commonly used procedure to transform a layered crystalline inorganic compound into a material with microporosity and mesoporosity. First, the terms "layered compound, pillaring, pillaring agent and interlayer region" are defined, and then the term pillared layered solid or pillared compound. In…
A chromium(III) binaphthyl Schiff base complex immobilised on modified MCM-41 is an effective catalyst for asymmetric epoxidation of unfunctionalised alkenes and gave significantly higher ee than the free complex.
A new class of magnetomechanical sensor materials, Co-ferrite (CoO/spl middot/Fe/sub 2/O/sub 3/) and metal-bonded (Ag, Ni, Co) Co-ferrite composites, has been investigated. These materials exhibited magnetostriction in excess of 200 ppm and high d/sub 33/ (/spl part//spl lambda///spl part/H)/sub /spl sigma// coefficie…
The crystal structure of ${\mathrm{ZrW}}_{2}{\mathrm{O}}_{8}$ and its variation with pressure and temperature have been investigated by in situ neutron powder diffraction. At room temperature, the cubic \ensuremath{\alpha} phase is stable below 0.21 GPa, where a first-order transition to the orthorhombic \ensuremath{\…
The addition of enough non-adsorbing polymer to a hard-sphere suspension causes the particles to aggregate to form a space-filling gel. The integrity of the gel persists for a finite period of time, and then the space-filling structure collapses suddenly to form a denser sediment. This phenomenon of ‘delayed sedimenta…
In the selective catalytic reduction (SCR) of NO by ammonia, over-exchanged Fe-ZSM-5 prepared by sublimation of FeCl3 into H-ZSM-5, shows superior catalytic activity and stability in a wide temperature range; its activity is promoted by the presence of water in the feed while SO2 is a weak poison at low but a promoter…
A powder sintering method was used to synthesize the intermetallic compounds LaCaMgNi 9 , CaTiMgNi 9 , LaCaMgNi 9 Al 3 , and LaCaMgNi 6 Mn 3 ( PuNi 3 ‐ type ) . The microstructure and primary phases were observed by scanning electron microscopy and X‐ray diffraction. The pressure‐composition isotherms showed that all…