Materials Literature
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Extensions of a previously presented Landau-de Gennes type liquid crystalline phase transition model for the direct isotropic/smectic-A (lamellar) a phase transition to the direct isotropic/smectic-C (tilted lamellar) transition are studied. Two different proposed extensions to the model are studied both in the contex…
Abstract Design of ionic liquids for dissolution, depolymerization, and energy conversion of cellulose and their derivatives is described. Importance of physicochemical properties such as polarity and hydrogen-bonding ability of the ionic liquids is described, and some practical approaches to prepare novel ionic liqui…
The research involves using phenol-formaldehyde (novolak) resin as amatrix for making composite material, while glass fiber type (E) and asbestos fibertype chrysolite were used as reinforcing materials. The specimens of compositematerials were prepared from each type of all the fibers mentioned above withweight fracti…
Abstract We have applied the full potential linearized augmented plane wave method (FP‐LAPW) within the density functional theory to investigate the structural and electronic properties of the Sc 0.5 In 0.5 N compound in the wurtzite and sodium chloride structures. We have analyzed the relative stability of this terna…
Abstract The effect of pressure on the conduction of the NbS 3 quasi‐one‐dimensional conductor is studied. A pressure induced insulator–metal transition is observed. The transition is accompanied by an increase in conductivity by six orders of magnitude at room temperature and the sign of thermal coefficient of resist…
A series of poly(ether sulfone)s copolymers (BP-COPPESs) based on phthalazinone and biphenyl moieties were synthesized by nucleophilic displacement reaction from 4-(4-hydroxyphenyl)-2,3-phthalazin-1-one (DHPZ), biphenol (BP) and bis(4-chlorophenyl) sulfone (BCS). The experimental results indicated that the higher init…
Abstract Novel star‐shaped subporphyrins with monodisperse oligocarbazole arms were prepared by using pyridine‐tri‐ N ‐pyrrolylborane as a template. It was found that photoinduced energy transfer took place from the oligocarbazole arms to the subporphyrin core, and the energy transfer efficiency decreased with an incr…
Abstract Ein Hoch auf den Elektronenspender : Die Effizienz der Elektrochemilumineszenz (ECL) und die Beständigkeit des radikalischen Zustands stiegen für den schlechten ECL‐Luminophor Pyren mit der Zahl peripherer Donoreinheiten merklich (siehe Bild). Diese ECL‐Verstärkung, die zur Entwicklung neuer Lichtemittermater…
Abstract Methods of installing photolabile protecting groups for carbonyl compounds under neutral conditions without using any other chemical reagents are described. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Abstract The compartmental [1+1] macrocycle H 3 L , obtained by self‐condensation of the formyl precursor 3,3′‐(3,6‐dioxaoctane‐1,8‐diyldioxy)bis(2‐hydroxybenzaldehyde) with the amine precursor N , N ‐bis(2‐aminoethyl)‐2‐hydroxybenzylamine, contains one inner ON 3 O 2 Schiff base and one outer O 2 O 4 crown‐like chamb…
Both spectra of transient absorption (lambda(max) = 390 nm) and luminescence (lambda(max) = 590 nm) for the (4)T(1) state of Mn(2+) in ZnS nanoparticles shift to long wavelengths by 40 nm and broaden by 1.7 times as the state becomes banded. The (4)T(1) band of capping Mn(2+) in ZnS nanoparticles decays on the time sc…
Abstract In this study, multitechnique image fusion between imaging X‐ray photoelectron spectroscopy (XPS) and phase imaging atomic force microscopy (AFM) is discussed. It is beneficial for the purpose of facilitating correlation of different physical properties such as phase information from AFM images with chemical…
Producing energy to supply the demands of our societies is reaching a critical limit. To tackle this issue, there is a slow renaissance of fission reactors and the push to realise fusion reactors. The safe, reliable and optimal performance of fusion and fission plants is dependent on the choice of suitable materials u…
Raman spectra have been measured on iron-based quaternary CeO 1− x F x FeAs and LaO 1− x F x FeAs with different amounts of fluorine doping at room temperatures. A group analysis has been made to clarify the optical modes. Based on first-principle calculations, the observed phonon modes can be assigned accordingly. In…
According to cyclic voltammetry, symmetrical dumbbell-shaped phenothiazine dyads bridged by heterocycles show intense electronic coupling between the redox-active phenothiazine moieties. Furthermore, the fluorescence of the pyridyl-bridged derivatives can be controlled by pH change giving reversibly switchable redox-a…
A 37-year-old female was found to have hypouricemia (1.1-1.9 mg%) with markedly increased uric acid clearance (24.7039.5 ml/min). Uric acid excretion was only slightly affected by pyrazinamide, a drug which suppresses renal tubular uric acid secretion, and by probenecid, a drug which inhibits tubular uric acid reabsor…
Abstract The synergistic effect of benzotriazole (BTAH) and molybdate on the inhibition of copper tarnish was studied in this paper. The antitarnish treatment of copper was conducted with BTAH solution containing molybdate. The surface morphology observation and composition analysis were investigated by SEM with energ…
The organization of conjugated polyelectrolytes (CPEs) interacting with biomolecules sets conditions for the biodetection of biological processes and identity, through the use of optical emission from the CPE. Herein, a well-defined CPE and its binding to DNA is studied. By using dynamic light scattering and circular…
Nowadays Nitinol structures are accepted and highly exploited in the medical field. Therefore, studying the mechanical properties of this material—which is not trivial by considering the thermal behaviour of the alloy—is very important in order to get quantitative data for a reliable design of novel Nitinol components…
Six pairs of Eu(III) and Tb(III) complexes of macrocyclic ligands, incorporating a common tetraazatriphenylene sensitiser, have been examined in terms of their solution structure, sensitivity to excited state quenching, protein affinity, cell toxicity and preliminary cell localisation profiles. A complex with three (S…