Materials Literature
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Photoinduced processes of a series of phosphorus tetraphenylporphyrin (PTPP) derivatives ([PTPP-(NHC6H4X)2]+Cl-, X = OCH3, CH3, H, Cl, CF3, and CN) have been investigated by using femtosecond laser flash photolysis mainly. PTPP with OH as an axial ligand showed S2 fluorescence upon excitation of the Soret band. The S2…
A novel polyoxovanadate (POV), [Zn(2,2'-bpy)3]4[(ppz){{Zn(tepa)}2ZnAs8V13O41(H2O)}2][As8V14O42(0.5H2O)]2.4H2O (1, 2,2'-bpy = 2,2'-bipyridine, ppz = piperazine, tepa = tetraethylenepentamine), has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectra, thermogravimetric analysi…
Abstract The Clay Minerals Society published a complete characterization scheme for its ‘Source Clays’ but not for its ‘Special Clays’. To address this issue, the specific surface areas (SSAs) of the 16 special clays from The Clay Minerals Society were determined using the Brunauer, Emmett and Teller (BET) method of a…
The hexadecyl amine capped Ag nanoparticles in chloroform are prepared by reducing [Ag(hexadecyl amine) 2 ]NO 3 complex with sodium borohydride in a chloroform/water medium. Poly(3-hexyl thiophene) (P3HT)−silver nanoparticle composites at five different compositions [Ag10, Ag25, Ag50, Ag75, and Ag90; the number indica…
Adsorption isotherms of benzaldehyde from aqueous solutions onto granular activated carbon have been determined and studied the effect of dosage of granular activated carbon, contact time, and temperature on adsorption.Optimum conditions for benzaldehyde removal were found adsorbent dose g » 4 g l -1 of solution and e…
The potential of Co-Re-based alloys as a new high temperature material class for service beyond 1200°C is explored. Complete miscibility of Co and Re and high melting point of Re provides good opportunity to design high temperature alloys. The rational for focusing on Co-Re-based alloys for gas turbines application be…
Catalytic esterase peptide dendrimers with a core active site were discovered by functional screening of a 65,536-member combinatorial library of third-generation peptide dendrimers using fluorogenic 1-acyloxypyrene-3,6,8-trisulfonates as substrates. In the best catalyst, RMG3, ((AcTyrThr)(8)(DapTrpGly)(4)(DapArgSerGl…
The reactions of [Mn12O12(O2CEt)16(H2O)4] with phenylphosphinic acid (PhHPO2H) in MeCN and MeCN/CH2Cl2 have led to isolation of [Mn22O12(O2CEt)22(O3PPh)8(H2O)8] (2) and [Mn22O12(O2CEt)20(O3PPh)8(O2PPhH)2(H2O)8]n (3), respectively, both containing PhPO3(2-) groups from in situ oxidation of PhHPO(2)(-). Complex 2 is mol…
We have investigated the magnetic and magnetoelastic properties of a series of Cr-substituted cobalt ferrite CoCrxFe2−xO4 (x=0.0–0.79) samples. Substitution of Cr for some of the Fe in cobalt ferrite reduced the Curie temperature, and the effect is more pronounced than that observed in Mn-substituted cobalt ferrite sa…
Density functional theory by means of the mixed-basis pseudopotential method was employed to carry out electronic-structure calculations of interfaces in $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}∕\mathrm{La}\mathrm{Al}{\mathrm{O}}_{3}$ and $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}∕\mathrm{Sr}\mathrm{Ru}{\mathrm{O}}_{3}$ p…
Lanthanum-doped MCM-48 molecular sieves with different La contents were synthesized hydrothermally and characterized by X-ray diffraction (XRD), nitrogen sorption, transmission electron microscopy (TEM), UV-visible spectroscopy, and Fourier transform infrared (FT-IR) spectroscopy. The results show that the majority of…
A simple epitaxial heterostructure of NiFe2O4–BaTiO3 grown on (001)-SrTiO3 substrate was prepared via pulsed laser deposition. Structural characterization by x-ray diffraction and electron microscopy showed good horizontal heterostructure of (001)-NiFe2O4‖(001)-BaTiO3 epitaxially grown on the substrate, which presents…
Raw and purified samples of carbon nanotubes are considered as multicomponent systems with a distribution of carbonaceous, amorphous, multishell graphitic particles and nanotubes, together with the particles of metal compounds from the catalyst. With respect to the carbon nanotube fractions, a distribution of size, de…
Methanol production from carbon dioxide was successfully achieved using resting cells of Methylosinus trichosporium IMV 3011 as biocatalysts. Carbon dioxide was reduced to methanol and extracellular methanol accumulation has been found in the carbon dioxide incubations. However, resting cells of methanotrophs have a f…
Two series of a unique class of columnar liquid crystals derived from tris(N-salicylideneaniline)s [TSANs] in which the proton and the electron interact with each other through the H-bonding environment are reported. The synthesis is carried out by condensing 1,3,5-triformylphloroglucinol with the respective dialkoxya…
Potassium niobate, KNbO 3 (KN), ceramics were prepared by a modified conventional ceramic fabrication process to characterize their piezoelectric properties. The modified process involving two-stage calcination (first stage at 600 °C and second stage at 1000 °C) is very effective in obtaining KN ceramics with a high d…
Two different categories of high-order numerical methods are adopted for the electro-hydrodynamic modeling of the streamer: the finite-element method (FEM) with flux-corrected-transport (FCT) technique and the finite-volume method (FVM) with monotonic upwind-centered scheme for conservation-law (MUSCL) algorithm. Spec…
Microscale fish bowls, hollow particles with engineered holes in their surfaces, were prepared using two different methods. In the first method, commercial latex beads suspended in water were swollen with a good solvent of the polymer, followed by freezing with liquid nitrogen and evaporation of the solvent below 0 de…
A major problem in paleo-ecological research of diatoms in tidal environments is the distinction of autochthonous and allochthonous diatom valves. A new approach applying several diatom- and non-diatomrelated criteria is introduced in order to solve the autochthonous/allochthonous problem. A classification of coastal…
Multilayered thin films consisting of alternatively stacking Pb(Zr0.4Ti0.6)O3 (PZT) and Ni0.8Zn0.2Fe2O4 (NZFO) layers were fabricated to exploit a strain-mediated coupling of piezoelectricity and magnetostriction. The 450-nm-thick PZT/NZFO multilayer fabricated by pulsed laser deposition showed magnetodielectric effec…