Materials Literature
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We show here how a Ru(bpy)2(CE-bpy) complex can be used for the ECL detection of sodium ion in both aqueous and nonaqueous media. Recognition of Na+ by the crown ether moiety in CE-bpy results in a significant increase in the ECL emission intensity of the complex.
A 3-D network polymer, Mn(NITpPy)2(tp)(H2O)2, has been synthesized and structurally and magnetically characterized. In the crystal structure, the 1-D chains are formed by [Mn(NITpPy)2]2+ units and terephthalate ligands, and they are linked together by hydrogen bonds to give rise to a 3-D network. Magnetic measurements…
Photocoloration of microcrystalline powder of spirooxazine and spiropyran compounds induced by femtosecond laser excitation was investigated using time-resolved and steady state diffuse reflectance spectroscopy. The intermediate products were observed in a ns time region, and assigned to non-planar open forms. On the…
Swelling of poly(methyl methacrylate) and poly(butyl methacrylate) samples in supercritical carbon dioxide and propagation of diffusion fronts in the samples were studied in situ at various temperatures and pressures using direct optical observation. The difference in the appearance of diffusion fronts in these polyme…
A new class of diblock copolymers was synthesized from biodegradable poly(lactic acid) and poly(ethylene glycol)minus signmonoamine. These polymers were activated by covalently attaching linkers such as disuccinimidyl tartrate or disuccinimidyl succinate to the hydrophilic polymer chain. The polymers were characterize…
Oxidative polymerization of bisphenolic monomers has been performed using peroxidase as catalyst in an aqueous organic solvent. Peroxidase induced the polymerization of an industrial product, bisphenol F, consisting of 2,2'-, 2,4'-, and 4,4'-dihydroxydiphenylmethanes. Under the selected conditions, the quantitative fo…
The serum transferrins are monomeric proteins with a molecular mass of around 80 kDa and are responsible for the transport of iron in vertebrates. The three-dimensional structures of diferric porcine and rabbit serum transferrin have been refined against X-ray diffraction data extending to 2.15 and 2.60 A, respectivel…
The phase behavior of polystyrene−polyisoprene diblock copolymers diluted with solvents strongly selective for polyisoprene was investigated using variable-temperature small-angle X-ray scattering. Tetradecane was employed as a model selective solvent; its addition induced lyotropic order−order transitions, with as ma…
Powder diffraction patterns of ordered mesoporous materials are simulated with a newly developed program, which allows investigation of the influence of any desired matter distribution in the unit cell on the diffraction pattern. The simulation process can be subdivided into two major steps. First, a unit cell is gene…
In this paper we show that 1-electron properties such as Compton profiles and structure factors of crystals can be asymptotically retrieved through cluster-based calculations, followed by an appropriate partition of the 1-electron reduced density matrix (1RDM). This approach, conceptually simple, is checked with respe…
A theory for the reliable prediction of the EPR g-tensor for paramagnetic defects in solids is presented. It is based on density functional theory and on the gauge including projector augmented wave (GIPAW) approach to the calculation of all-electron magnetic response. The method is validated by comparison with existi…
This paper shows that the phenomenon of orbital ordering should be detectable by energy-filtered quantitative convergent-beam electron diffraction (QCBED). The structure factors of LaMnO(3) crystals are calculated using a non-spherical atomic scattering model of the Mn(3+) ion. Several low-order electron structure fac…
In the present study, we investigated the effects of annealing of amorphous hydrogenated carbon (a-C:H) films, particularly with respect to structural changes of the carbon network and their impact on the hydrogen-atom-induced erosion. The a-C:H films were deposited at 300 K on a Pt(111) single crystal using the ion-b…
Treatment of [Al4(μ4-O)(OBui)10(BuiOH)] 1 with 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in boiling toluene produced [Al5(μ5-O)(μ-OBui)8(OBui)5] 2, whereas removal of BuiOH from 1 by azeotropic fractional distillation with toluene gave [Al8(μ4-O)2(μ-OH)2(μ-OBui)10(OBui)8] 3. X-Ray crystallography revealed that in 2 the…
An analysis of the normal modes of vibration of a cubic perovskite that have condensed to produce phases with tilted octahedra is presented. Only structures with octahedral tilts that double a repeat distance are considered; these involve small rotations of the octahedra about pseudocubic <100> directions. Phases with…
Two new transition-metal gallophosphates, (H 3 DETA)[Mn(H 2 O) 2 Ga(PO 4 ) 2 ] 3 ( 1 ) and (H 3 DETA)[Zn 3 Ga(PO 4 ) 4 ]·H 2 O ( 2 ) (DETA = NH 2 (CH 2 ) 2 NH(CH 2 ) 2 NH 2 ), have been synthesized under mild hydrothermal conditions and characterized by single-crystal X-ray diffraction, thermogravimetric analysis, and…
The low-temperature alloying of Ag/Pd nanoparticles synthesized in a fatty acid film by a novel ion-entrapment process is described. Nanoparticles of silver and palladium were grown in thermally evaporated fatty acid (stearic acid) films by immersion of the film sequentially in solutions containing Ag + ions and Pd 2+…
[reaction: see text] Stoichiometry is found to be an effective tool for controlling supramolecular chirality induction and inversion processes. Chirality induction in the achiral syn ethane-bridged bis(zinc octaethylporphyrin) is achieved upon interaction with the enantiopure (R,R)-1,2-diphenylethylenediamine at the l…
Virgin ethylene propylene diene monomer (EPDM) rubber in a thermoplastic elastomeric blend of polypropylene (PP) and EPDM rubber was substituted by ground EPDM vulcanizate of known composition, after which the mechanical properties of the raw EPDM/waste EPDM/PP blends were determined. The ratio of the rubber content i…
The X-ray crystal structure and the second order nonlinear optical response of trans-stilbazole are discussed. Given that diffraction intensities are completely insensitive to any small distortion from centrosymmetry, stilbazole X-ray diffraction data are better modelled in the centrosymmetric P21/c space group and ca…