Materials Literature
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Self-assembly of AgNO 3 with the semirigid tetratopic ligands 1,2,4,5-tetrakis(benzoimidazol-1-ylmethyl)benzene (TBim) and 1,2,4,5-tetrakis(5,6-dimethylbenzimidazol-1-ylmethyl)benzene (TDMBim) afforded compounds [Ag 4(mu 4-TBim) 2(mu 2-eta (2)-NO 3) 2](NO 3) 2. (1)/ 2CH 2Cl 2.2CH 3OH ( 1mu (1)/ 2CH 2Cl 2.2CH 3OH) and…
Abstract Multiferroic magnetoelectric PbTi 1– x Fe x O 3 compounds were prepared using a solid‐state reaction method in the composition range 0 ≤ x ≤ 0.15. The temperature dependence of lattice parameters of PbTi 1– x Fe x O 3 was determined from high‐temperature X‐ray diffraction. The average volumetric thermal expan…
Unusually accepting: A series of metalloporphyrin–ruthenocene complexes, synthesized by direct coordination of a [Ru(Cp*)]+ fragment to the π-electron “face” of several metallooctaethylporphyrins (see graphic), undergo efficient photoinduced electron transfer from the ruthenocene unit (acting as the electron donor) to…
Dynamische Beobachtung: Die schnelle oxidative Redispersion großer Pt-Nanopartikel auf einem Ceroxidträger in Abgaskatalysatoren bei Abwesenheit von Cl wurde durch eine In-situ-XANES-Analyse belegt. Ein Modell erklärt die beobachtete Redispersion mit dem Abfangen von Pt-Spezies an Positionen auf dem Certräger, die ein…
A second-generation (acridizinium) 12 -dendrimer based on a poly(2,2-bis(hydroxymethylpropionic acid)) [bis-MPA] scaffold which can undergo photoinduced (4π + 4π) cycloaddition reactions on exposure to blue-violet light at 405 nm, and be reversed upon irradiation at 257 nm, has been synthesized. This provides an alter…
Abstract The structural, electronic, elastic and optical properties of the boron antimony (BSb) compound are investigated by first‐principles pseudopotential method. The calculations show the structural phase transition from the zincblende (ZB) to the rocksalt (RS) structures at the transition pressure of 56 GPa and w…
Schalten mit Licht und Leichtigkeit: Die beschriebene Regulierungsstrategie für die Hybridisierung nutzt die lichtinduzierte cis-trans-Isomerisierung eines photochromen Nucleosids (PCN). Der Prozess schaltet auch bei Raumtemperatur einfach und reversibel zwischen Doppel- und Einzelsträngen (siehe Schema), und die Einf…
Gut und viel: Eine injektionsfreie Synthese qualitativ hochwertiger CdSe-Nanokristalle gelingt an Luft, d. h., es muss nie auf Sauerstoffausschluss geachtet werden. Die mit SeO2 als Selenquelle arbeitende Synthese eignet sich für die kostengünstige industrielle Synthese hochwertiger Nanokristalle im großen Maßstab und…
Microphase separation and morphology of star ABC triblock copolymers confined between two identical parallel walls (symmetric wetting or dewetting) are investigated with self-consistent field theory (SCFT) combined with the "masking" technique to describe the geometric confinement of the films. In particular, we exami…
In this paper, we adopt a facile method to prepare a new type of hollow silica spheres with thiol functional groups. Thiol-functionalized silica shells were coated on positively charged polystyrene particles by hydrolysis and condensation of 3-mercaptopropyltriethoxysilane (MPTS); the polystyrene cores were dissolved…
Single-walled carbon nanotube (SWNT) bundles are selectively removed from an aqueous dispersion containing individually suspended carbon nanotubes coated with gum Arabic via interfacial trapping. The suspensions are characterized with absorbance, fluorescence, and Raman spectroscopy as well as atomic force microscopy…
Abstract The thermal behavior of cellulose dissolved in ionic liquids was studied in comparison to NMMO solutions. The cellulose solutions were characterized by reaction calorimetry and UV‐vis spectroscopy. Generation of chromophoric substances in cellulose/IL solutions is minimized by exposing to temperatures of abov…
Glasses in the xGd2O3 x (100 - x)[7TeO2 x 3P2O5] system with 0 < or = x < or = 20 mol % have been prepared using the melt quenching method. The influence of gadolinium ions on structural behavior of the phosphate tellurate glass has been investigated using infrared spectroscopy and density functional theory (DFT) calc…
Abstract In recent years nanocrystalline semiconductors (QD) have attached much attention due to their great potential in technological applications. Electronic, optical and other properties of QD with respect to corresponding bulk materials are modified considerably, offering a number of potential applications in sem…
Transient state kinetics of the catalytic oxidation of CO with O(2) on Pd-surfaces has been measured under isothermal conditions by using a molecular beam approach. Systematic studies were carried out as a function of reaction temperature and CO+O(2) composition. With sufficient kinetic evidence, we have demonstrated…
Abstract The traditional principle of the mid‐twentieth century that ‘stronger chemical bonds imply a weaker thermal expansion' appeared to be valid for cubic crystals but failed to explain many cases of real high anisotropic thermal expansion of non‐cubic crystals. In particular, the discovery, a quarter of a century…
A fast and single-step method was successfully developed toward synthesizing well-ordered organic-inorganic hybrid layered manganese oxide (LMO) nanocomposites and Keggin/organic ions intercalated into layered manganese oxide at room temperature in 1 day. The ordering of layered structures is highly dependent on pH an…
Abstract Three new manganese compounds have been obtained by reaction of the 2,6‐diacetylpyridine dioxime (dapdoH 2 ) ligand with several Mn II salts. By using a variety of manganese(II) carboxylates, three Mn II derivatives with general formula [Mn 3 (RCOO) 6 (dapdoH 2 ) 2 ], where RCOO – = formate ( 1 ), acetate ( 2…
A trinuclear manganese complex, [Mn 3O(Me-salox) 3(2,4'-bpy) 3(ClO 4)].0.5MeCN ( 1.0.5MeCN; Me-H 2salox = 2-hydroxyphenylethanone oxime), has been synthesized and characterized structurally as a [Mn (III) 3(mu 3-O)] (7+) core. Structural distortion by the twisting of the oxime ligand dominates ferromagnetic interactio…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSeparation Promoted by Molecular Recognition of a Core Engineered Macromolecular NanocapsuleDecheng Wan*, Hongting Pu, and Xiangyu CaiView Author Information Institute of Functional Polymers, Key Laboratory of Advanced Civil Enginee…