Materials Literature
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Stepwise reactions of [Et(4)N][Tp*WS(3)] () (Tp* = hydridotris(3,5-dimethylpyrazol-1-yl)borate) with 1-4 equiv. of CuNCS (and Et(4)NBr in the case of three equiv. of CuNCS) afforded the [1 + 1] to [1 + 4] addition products [Et(4)N][Tp*WS(mu-S)(2)(CuNCS)].0.5CH(2)Cl(2) (.0.5CH(2)Cl(2)), [Et(4)N][Tp*W(mu(3)-S)(mu-S)(2)(…
The phase formation in the BaB 2 O 4 -NaF cut has been investigated by the methods of solid-phase synthesis, visual polythermal analysis, and spontaneous crystallization on a platinum loop. A range of primary crystallization of the new compound Ba 2 Na 3 [B 3 O 6 ] 2 F (hexagonal system, P 6 3 / m , a = 7.346(1) Å, c…
Using infrared spectroscopy, a comparative investigation was carried out of the surface properties of mesoporous aluminas prepared by the carbon templating route and of a commercial alumina PURAL SB. In the hydroxylated state the mesoporous materials bear surface OH groups terminally bonded to an octahedral Al3+ ion,…
A method for the preparation of neutral monoporphyrinate ytterbium(iii) complexes [Yb(TPP)(L)(H(2)O)] from their precursor [Yb(TPP)(H(2)O)(3)]Cl is presented, where TPP is 5,10,15,20-tetraphenylporphyrinate dianion and L are the bidentate anions of 8-hydroxylquinoline (HOQ), 1-hydroxyl-7-azabenzotriazole (HBTA), 2-ben…
The mesophase behaviour of a rod-coil multiblock copolymer is assessed by means of a new soft-core simulation model, which is suitable for the simulation of combinations of isotropic and anisotropic particles. The simulations demonstrate the presence of isotropic melt, micelles, lamellar, nematic and gyroid phases, wi…
The experimentally found decomposition temperature of Mg(BH4)2 and the equilibrium temperature that follows from thermodynamics calculated for this reaction using density functional theory methods differ significantly. This is an indication of the fact that a strong kinetic barrier exists, preventing the formation of…
Reaction of unsymmetrical tridentate 2-benzimidazolyl-6-carboxamidopyridine binding units in the ligands (b) and with neutral Ln(NO(3))(3) (Ln is a trivalent lanthanide) gives mononuclear [Ln((b))(NO(3))(3)(solvent)] and binuclear [Ln(2)(L5)(NO(3))(6)(solvent)(2)] complexes. The crystal structures of (b) and [Eu((b))(…
Unlike their octahedral analogues, copper(II) compounds with trigonal prismatic stereochemistry undergo an elongation of two bonds in cis positions due to a Jahn-Teller effect, a behavior that can also occur in slightly twisted octahedra.
Both poly(ethylene glycol) (PEG) grafting and layer-by-layer polyelectrolyte multilayer (PEM) deposition for surface modification of biomaterials have been shown to decrease cell adhesion. The aim of this study was to investigate the synergic efficacy of PEGylated PEM films on reducing cell adhesion. PEG grafted to po…
Direct write technology assists the electronic industry in their effort to miniaturize electronic circuits and enhance speed of printing capability. The technology allows printing various patterns without employing a mask or a resist with an enhanced speed with the aid of computer.This paper describes the current stat…
Very small ( approximately 2 nm) silver nanoparticles can be readily prepared using p-phosphonated calixarenes as templating agents and surfactants, at the same time allowing the use of hydrogen gas as an environmentally benign reductant.
The double stranded Cu(II)2-metallacyclic complex of formula [Cu2(mbpb)2].2H2O (1) and the triple stranded Ni(II)2-metallacyclic complexes of formula [Ni2(Hmbpb)3]PF6.21H2O (2), [Co(H2O)6][Ni2(mbpb)3)]THF.10H2O (3) and {Ag2(H2O)[Ni2(mbpb)3]}.11H2O (4) (where H2mbpb is the bisbidentate dinucleating bridging ligand 1,3-…
Cu:SAPO-5 and Cu:SAPO-11 were prepared by conventional and hydrothermal ion exchange. Copper incorporation is increased six-fold by hydrothermal ion exchange relative to conventional methods. In all cases, the amount of copper taken up by SAPO-11 is superior to uptake in SAPO-5. Copper is divalent and in tetragonally-…
Abstract Recent advances in the synthesis and characterization of materials for environmental catalysts are reported in this paper. Highly advanced environmental catalysts for decomposition of volatile organic compounds and nitrogen oxides were artificially designed based on a concept usually employed in the fields of…
Gold nanoparticles functionalized with imidazolylporphyrinatozinc(II)s were bridged by successive imidazole-to-zinc coordination of bidirectional porphyrinatozinc(II) units.
Here we report chemically induced folding of thin graphene flakes. The folding occurs spontaneously when an intercalating species interrupts the adhesion between graphene and a supporting substrate. The morphology of induced folds suggests that the conjugated pi network is capable of extremely sharp curvature. Adjacen…
Liposomes are microparticulate lipoidal vesicles which are under extensive investigation as drug carriers for improving the delivery of therapeutic agents. Due to new developments in liposome technology, several liposome-based drug formulations are currently in clinical trial, and recently some of them have been appro…
The objective of this work is to study the magnetic properties of arrays of Ni-Fe nanowires electrodeposited in different template materials such as porous silicon, polycarbonate and alumina. Magnetic properties were studied as a function of template material, applied magnetic field (parallel and perpendicular) during…
Bu çalışmanın amacı, çözücü buharlaştırma yöntemi ile poli (DL-laktid-ko-glikolid) (PLGA) nanopartiküllerinin hazırlanması ve bu nanopartiküllerin özellikleri üzerine çeşitli stabilizasyon ajanlarının etkilerinin aydınlatılmasıdır. Stabilizasyon ajanlarının kullanılması, nanopartikül üretim işlemi sırasında stabil emü…
In the past five decades, many new types of polymers, containing nitrogen and phosphorus atoms as a significant part of the polymer backbone, have been synthesized. This paper reviews the developments in the field of polyphosphazenes and their applications. In this paper, synthesis, characterization, functionalization…