Materials Literature
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Platonic scaffold: Octa(azidopropyl) cube-octameric silsesquioxane is a versatile scaffold for uniform eightfold symmetric decoration by efficient Huisgen-type 1,3-dipolar cycloaddition under both thermal and CuI-catalyzed conditions (see scheme). Applications are demonstrated for the formation of glycoclusters, as we…
Spektroskopische, (photo)magnetische und Strukturstudien belegen reversible thermische und lichtinduzierte Änderungen der optischen und magnetischen Eigenschaften für den abgebildeten {Fe2Co2}-Cyanometallat-Vierkernkomplex. Die beobachtete Bistabilität ist das Ergebnis eines intramolekularen Elektronentransfers, wie e…
Carbon nanotube (CNT)−CNT contact and CNT distribution effects on anisotropic thermal transport in aligned CNT−polymer nanocomposites (PNCs) are studied using an off-lattice Monte Carlo numerical simulation. Inter-CNT contact and the associated thermal boundary resistance are shown here to significantly affect transpo…
A molecular "hexad" in which five bis(phenylethynyl)anthracene (BPEA) fluorophores and a dithienylethene photochrome are organized by a central hexaphenylbenzene unit has been prepared. Singlet-singlet energy transfer among the BPEA units occurs on the 0.4 and 60 ps time scales, and when the dithienylethene is in the…
Reconfigurable nanostructures represent an exciting new direction for materials. Applications of reversible transformations between nanostructures induced by molecular conformations under external fields can be found in a broad range of advanced technologies including smart materials, electromagnetic sensors, and drug…
Wheat straw was used to produce medium-density fiberboard (MDF). The chemical and physical characteristics of fractionated size-reduced wheat straw were investigated. The pH, pH-buffering capacity, ash, and silicon content increased as wheat straw particle size decreased. Ash of the finest straw, <0.2 mm, had high…
Polynuclear FeII Clusters: A new family of {Fe5} cluster compounds formulated with [{FeII(μ-bpt)3}2FeII3(μ3-O)]X2 have been synthesised from the solvothermal reactions of 4-amino-3,5-bis(pyridine-2-yl)-1,2,4-triazole with ferrous salts. The spin states of the two apical iron(II) ions in the cationic pentanuclear {Fe5}…
Abstract Polarised Raman and IR spectra of K 4 Nb 6 O 17 and K 4 Nb 6 O 17 · 3H 2 O single crystals were measured. The obtained spectra are discussed using the factor group approach for the orthorhombic P 2 1 nb space group and assignment of bands to the respective motions of atoms is proposed. In particular, we have…
By partial exchange of surface protons of a polyoxometalate (POM; H 5 PO 40 V 2 Mo 10 ) by an ionic liquid (IL; butylmethylimidazolium, bmim + ), a protonic IL-POM ([bmim] 4 HPO 40 V 2 Mo 10 ) was obtained. Further exchange of this material with Pd 2+ yields a final solid that HRTEM and EXAFS-XANES techniques show to…
We evaluated the cytotoxicity of various morphological classes of TiO(2) nanostructures (including 0-D nanoparticles, 1-D nanorods, and 3-D assemblies) toward living cells. These TiO(2) nanostructures were modified with fluorescent dye molecules, mediated via a dopamine linkage, in order to facilitate a confocal study…
This paper explores the influence of textile, physiological, and sensorial parameters on sock comfort. Comfort parameters of sport socks were evaluated in two different sport exercises by a non-trained panel. The criteria of the sensory evaluation were perceived foot temperature, fabric dampness, and pain. No rating s…
The interaction between water-soluble Keplerate polyoxometalate {Mo(72)Fe(30)} macroions and small countercations is explored by laser light scattering, anomalous small-angle X-ray scattering (ASAXS), and isothermal titration calorimetry (ITC) techniques. The macroions are found to be able to select the type of associ…
The preparation by the deposition-precipitation method (using Na(2)PdCl(4) as a palladium precursor and Na(2)CO(3) as a basic agent) of Pd catalysts supported on gamma-Al(2)O(3) and on two different types of active carbons has been followed by several techniques (UV-vis, EXAFS, XRPD, and TPR). This work consists of fo…
In this work, we report on our studies on the multiferroic properties of two rare earth chromates, GdCrO3 and YCrO3. Polycrystalline bulks and thin films have been fabricated using conventional solid state reaction and pulsed laser deposition. Magnetic measurements have revealed that both compounds show weak ferromagn…
The twisted lateral tetraalkyloxy ortho-terphenyl units in dibenzo[18]crown-6 ethers 1a-f were readily converted into the flat tetraalkyloxytriphenylene systems 2a-f by oxidative cyclization with FeCl(3) in nitromethane. Reactions of the latter with potassium salts gave complexes KX.2, which displayed mesomorphic prop…
Abstract A new type of outstandingly active gold catalysts has been developed for the aerobic oxidation of amines to imines. The gold nanoparticles are generated in situ in an organic medium prior to the oxidation reaction. Various gold salts, preferably AuCl 3 and HAuCl 4 ⋅3 H 2 O, can be applied in the presence of n…
Synthesis and characterization of bulk NaxCoO2 samples substituted by K and Rb is reported. Phase formation studies revealed a narrow stable region for Na-alkali metal-Co system. Whisker and platelike single crystalline structures have been found to form on the surface of the pellets in case of K doping. All samples w…
Fully biodegradable, green composites were fabricated with ramie fibers and modified soy flour (MSF) resin. Defatted soy flour (SF) was modified by a lab-scale filtration system to improve its mechanical, interfacial, and thermal properties through increasing the protein content. The protein content of SF was increase…
Monolithic materials have become very popular because of various applications, especially within chromatography and catalysis. Large surface areas and multimodal porosities are great advantages for these applications. New sol-gel preparation methods utilizing phase separation or nanocasting have opened the possibility…
Aluminum toxicity is one of the major soil factors limiting root growth in acidic soils. Because of the increase in organic matter content in the upper few centimeters of soils under no‐till systems (NTS), most Al in soil solution may be complexed to dissolved organic C (DOC), thus decreasing its bioavailability. The…