Materials Literature
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Using low temperature synthesized BCNO phosphors as raw materials, monodispersed BCNO nanoparticles are obtained successfully after a two-step centrifugation. X-ray diffraction results indicate that these BCNO nanoparticles are mainly hexagonal BN phase. These BCNO nanoparticle-embedded polymer nanofibers with an aver…
The diffusive process of dispersed particles in a semi-infinite cell of an anisotropic fluid limited by an adsorbing surface is theoretically investigated. The densities of bulk and surface particles are analytically determined, taking into account the conservation of the number of particles immersed in the sample. It…
The adsorption of dioxygen to copper in CuHY zeolites has been studied by means of FTIR spectroscopy and model calculations at the quantum mechanical/molecular mechanics (QM/MM) level. Different Si/Al ratios, substitution patterns and adsorption sites within the cavities of the zeolite lead to a large number of differ…
The colloidal self-assembly process for the formation of polyhedral oligomeric silsesquioxane cubic crystals is described; the growth process consists of the formation of spherical particles, one-dimensional particle chains, bundles of chains, and finally, the formation of cubic crystals.
A detailed study of the oxidation of L-ascorbic acid by dioxygen and nitrite in water at pH 5.8 and 7.0, catalyzed by the octasulfophenyltetrapyrazinoporphyrazine complex of cobalt(II), was carried out using conventional spectrophotometric, low-temperature and high-pressure stopped-flow techniques. The Co(II) complex…
The RS-Au-SR complex (RS- being an alkylthiolate group) has been determined to be an important structural motif at the interface of self-assembled monolayers (SAMs) of thiolate on gold. We investigate the conversion between two stable configurations (cis and trans) of the CH3S-Au-SCH3 complex on Au(111) by applying de…
In situ observation during hydrogen ion implantation was performed with a transmission electron microscope installed in an ion accelerator to investigate the growth process of Zr hydride in Zircaloy-4. To clarify the effect of radiation damage, some samples were irradiated with 4 MeV Ni3+ ions prior to hydrogen implan…
Ni-doped γ-Al2O3 with different molar compositions has been synthesized on α-Al2O3 porous supports by the sol-gel method using nitrate-alkoxide precursors. The increasing of lattice constants by Ni doping showed the formation of uniform solid solution. When the Ni content increased up to 10 mol%, NiO phase was formed.…
Polymer composites are among the most rapidly growing research fields in material science. Polymer composites are adding a great deal of material that is more durable and useful as compared to the conventional material. Properties of composite materials greatly depend on the nature, proportion and compatibility of the…
The properties of polystyrene brushes in dry conditions and in toluene solution are studied as a function of grafting density using molecular dynamics simulations. Both, individual brushes and double layers of opposing brushes are considered, the structural properties of which were found to be similar. The density pro…
We present a simple and efficient strategy for the synthesis of acrylate-functionalized oligofluorenes. Within one single synthetic step photopatternable oligofluorenes with variable acrylate contents and molecular weights are formed. The Yamamoto condensation yields well defined oligomers by the direct polymerization…
Porphyrin is a very important component of natural and artificial catalysis and oxygen delivery in blood. Here, we report that, based on first-principles density-functional calculations, a hydrogen molecule can be adsorbed non-dissociatively onto Ti-, V-, and Fe-porphyrins, similar to oxygen adsorption in heme-contain…
With trans-dicyanideiron(III) precursor K[Fe(salen)(CN)(2)] x CH(3)OH (1) (H(2)salen = N,N'-bis(salicyl)ethylenediamine) as a building block, four new cyanide-bridged heterometallic Fe(III)-Mn(II) complexes {[Fe(salen)(CN)(2)](2)[Mn(bipy)(2)]} x CH(3)OH x 2 H(2)O (2), {[Fe(salen)(CN)(2)](2)[Mn(phen)(2)]} x CH(3)OH (3)…
The novel chain compound [Cu(Phtfac)(2)(NITpPy)](n) (where NITpPy = 4-pyridyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and Phtfac = 4,4,4-trifluoro-1-phenylbutane-1,3-dione) was synthesized and characterized structurally, magnetically and by EPR. The compound contains two non equivalent Cu(II) ions, Cu1 and Cu2,…
Two mononuclear seven-coordinated macrocycle Mn(II) compounds and four new cyanide-bridged MI–MnII (M = Ag, Au) one-dimensional chain complexes have been synthesized and crystallographically characterized: [Mn(L1)Cl2] · H2O (1), [Mn(L2)Cl2]·H2O (2), [Ag(CN)2Mn(L1)][Ag(CN)2] (3), [Ag(CN)2Mn(L2)][Ag(CN)2] · 1.5H2O (4),…
Multi-dimensional high-field/frequency electron paramagnetic resonance (HFEPR) spectroscopy is performed on single-crystals of the high-symmetry spin S = 4 tetranuclear single-molecule magnet (SMM) [Ni(hmp)(dmb)Cl](4), where hmp(-) is the anion of 2-hydroxymethylpyridine and dmb is 3,3-dimethyl-1-butanol. Measurements…
We report molecular design, synthesis, and photophysical study of a series of near-infrared absorbing and fluorescing dyes, 3,5-difuranylvinyl-boradiaza-s-indacenes, bearing various 5-membered heteroaromatic heads at the 8-position (FBs). The correlation between the molecular structure and the spectral shift has been…
A multianalytical approach with in situ capability has been used to explore the initial oxidation of zinc in air with 90% relative humidity at . The only surface species identified were zinc oxide (ZnO) and reversibly adsorbed water. Atomic force microscopy and X-ray diffraction revealed the homogeneous nucleation of…
A composite based on mesoporous ordered silica (SBA-15) and carbon nanotubes (CNTs), has been synthesized to be used in biomedical applications as a conductor composite for cell stimulation and regeneration. The influence of the CNT addition time on the SBA-15–CNTs composite synthesis has been studied and optimized at…
The effects of pulsed water injection at the intake port of a modern port fuel injection gasoline engine were investigated. A port water injection system was developed and the water injector was installed on the intake runner of the single cylinder motorcycle engine at a location upstream of the fuel injector. The res…