Materials Literature
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Elongated CdSe nanocrystals (nanorods) coated with long phosphonate ligands are deposited by pulse valve injection under ultrahigh vacuum on atomically clean surfaces. The alignment of individual CdSe nanorods is observed on the $\mathrm{Si}(100)\text{\ensuremath{-}}2\ifmmode\times\else\texttimes\fi{}1:\mathrm{H}$ sur…
In this work, a series of MoO 3 /TiO 2 −SiO 2 catalysts were tested in the transesterification of dimethyl oxalate (DMO) with phenol to produce methyl phenyl oxalate (MPO) and diphenyl oxalate (DPO). The evaluation results showed that MoO 3 /TiO 2 −SiO 2 catalysts were more active and selective than both MoO 3 /SiO 2…
Abstract The bromine addition to the SBR double bonds in chloroform at 0°C has been investigated by FTIR, 1 H NMR and DSC techniques. In this case, bromine molecules react exclusively with the polydiene double bonds and the polystyrene units are unaffected. The bromine reacts preferentially with 1,4‐trans double bonds…
Racemic 1-phenylethylamine was optically resolved by its own derivative formed with glutaric acid namely (+)-(R)-N-(1-phenylethyl)glutaramic acid. The amide acid resolving agent was synthesized from (+)-(R)-1-phenylethylamine by N-derivatization. The glutaric acid derivative was the next in a homologous series of dica…
Utilizing a combination of the in situ magneto-optical Kerr effect and scanning tunneling microscopy and spectroscopy measurements, we show that the (100) surface of the B2 bulk paramagnetic CoAl is an excellent representation of a two-dimensional ferromagnet. The order-parameter critical exponent beta=0.22+/-0.02 is…
Dynamic in situ spectroscopic ellipsometry studies of poly(vinyl alcohol)−poly(acrylic acid) (PVA−PAA) composite films are presented. Thin films immobilized on glass substrates were conditioned over time in aqueous media. Dynamic measurements consisted of thickness (swelling ratio) and optical constant changes in time…
Kleines Molekül, große Strukturen: Das Verknüpfen zweier zwitterionischer Bindungsmotive mit einem lipophilen Alkyllinker liefert ein amphiphiles Bis-Zwitterion, das sich sogar in polaren Lösungen zu Vesikeln organisiert. Die Daten sprechen dafür, dass zwei Bis-Zwitterionen dimerisieren und anschließend, vermutlich au…
Abstract Silica xerogels containing Sm 3+ ions and SnO 2 nanocrystals were prepared in a sol–gel process. The image of transmission electron microscopy (TEM) shows that the SnO 2 nanocrystals are dispersed in the silica matrix. The X-ray diffraction (XRD) of the sample confirms the tetragonal phase of SnO 2 . The xero…
Eu-doped nanocrystalline Lu 2 O 3 with different particle sizes was prepared by combustion synthesis. The local structures around the rare-earth Lu and Eu ions were studied by using both Lu and Eu L 3 edge X-ray absorption spectroscopy. According to the extended X-ray absorption fine structure (EXAFS) analysis, detail…
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The topotactic reduction of La0.5Sr0.5MnO3 leads to ordering of the anionic vacancies in the La0.5Sr0.5MnO2.5 composition. The isolated material, which is isostructural with Sr2Fe2O5, crystallises in the brownmillerite structural type with unit cell parameters a=0.54117(3), b=1.67608(12), c=0.54004(3) nm and space gro…
Abstract Well‐defined polystyrene (PSt), poly(ε‐caprolactone) (PCL) or poly(2‐methyloxazoline) (POx) based polymers containing mid‐ or end‐chain 2,5‐ or 3,5‐dibromobenzene moieties were prepared by controlled polymerization methods, such as atom transfer radical polymerization (ATRP), ring opening polymerization (ROP)…
Thin films of the charge-ordered ${\mathrm{Pr}}_{0.5}{\mathrm{Ca}}_{0.5}\mathrm{Mn}{\mathrm{O}}_{3}$ (PCMO) compound have been deposited on (001)-oriented ferroelectric $(1\ensuremath{-}x)\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}\ensuremath{-}x\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ $(x\ensur…
Abstract A novel thermosetting polyurethane (TSPU)/organic montmorillonite (OMMT) nanocomposite has been synthesized. N ‐diamino octadecyl trimethyl ammonium chloride (DODTMAC) was used as an intercalation agent to treat Na + ‐montmorillonite (MMT) and form a novel kind of OMMT. Fourier transform infrared spectroscopy…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTQuantifying Crystalline Fraction within Polymer SpherulitesKonstantinos G. Gatos, Chrysa Minogianni, and Costas GaliotisView Author Information Institute of Chemical Engineering and High Temperature Chemical Processes, Foundation fo…
Binary SmH(3) (trigonal, a=656.7(3), c=680.1(3) pm, P$\bar 3$c1, Z=6), ternary SmMg2H7 (tetragonal, a=626.47(6), c=937.2(2) pm, P4(1)2(1)2, Z=4) and the corresponding deuterides SmD3 (a=653.9(1)m, c=676.7(2) pm) and SmMg2D7 (a=624.10(1), c=934.81(2) pm) have been prepared by hydrogenation (deuteration) of elemental sa…
The adsorption, diffusion and desorption of chlorine on and from stoichiometric, reduced and partially reduced (defective) rutile TiO2{110} are investigated using ab initio density functional theory (DFT) calculations. Theoretical results are compared with experimental investigations, and microkinetic simulations base…
Tris(bipyridine)ruthenium(II) is used as a templating agent to insert palladium(II) into three-dimensional oxalate-based networks. The templated-assembly of [Ru(bpy)(3)][Pd(2)(ox)(3)] (Pd(2)) and [Ru(bpy)(3)][PdMn(ox)(3)] (PdMn) is described. The latter compound is structurally characterized by powder X-ray diffractio…
The structure of hexacatenar bent-shape molecules has been systematically modified in order to determine the main molecular factors responsible for the appearance of the axially polar columnar mesophase. It was found that the stability of the polar phase is very sensitive to the subtle modifications of the molecular s…
To test predictions about the activity of Ru catalysts the RuO 2 (110) surface was investigated in an oxygen atmosphere at ambient pressure using scanning tunneling microscopy (STM). Epitaxial RuO 2 (110) films were grown on a Ru(0001) sample following an established preparation technique from ultrahigh vacuum (UHV) i…