Materials Literature
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We describe the gelation, upon self-assembly of a series of nonchiral molecules, resulting in tubular morphology of the fibers. These are biscarbamates, which are model compounds for polyurethanes with two hydrogen bonding groups separated by a (CH(2))(6) spacer and symmetrically substituted with alkyl chains on eithe…
Resonance Raman (RR) spectroscopy and density functional theory (DFT) calculations of oxochromium(IV,V) derivatives of 5,10,15-tris(pentafluorophenyl)corrole (tpfpc) are shown to provide useful information about the relative strength of the metal-oxo bond in high-valent Cr(IV) versus Cr(V) corroles. Isotope labeling o…
The ability to control the processing of artificial silk is key to the successful application of this important and high performance biopolymer. Understanding where our current reconstitution process can be improved will not only aid us in the creation of better materials, but will also provide insight into the natura…
The effects of atmospheric air-plasma treatments on woven polyester (PET) textile structures were studied by surface analysis methods: zeta potential, X-ray photoemission spectroscopy (XPS), wettability and capillarity methods. The zeta potential of the fabrics was based on the established principles of streaming pote…
Abstract Syntactic foams containing 60 vol% of hollow glass microballoons in epoxy matrix are modified with untreated nanoclays using combined mechanical and ultrasonication methods. Effects of nanoclays on flexure and thermal behavior of syntactic foams are investigated by adding different amount of nanoclays in the…
Wunschfarben: Monodisperse rechtwinklig-dreieckige Silber-Bipyramiden (siehe SEM-Bild) wurden durch photoinduzierte Synthese in hohen Ausbeuten erhalten. Die Kantenlänge der Bipyramiden lässt sich einfach über die Wellenlänge des Anregungslichts steuern (siehe Diagramm).
Abstract The aim of this study is to investigate the effect of hexagonal boron nitride (BN) particle shape/size and loading level on the thermal, mechanical, electrical properties, and morphology of styrene‐ethylene‐butylene‐styrene terpolymer (SEBS)/poly(ethylene‐ co ‐vinyl acetate) (EVA) blends to be used as thermal…
The reverse micelle sol-gel method was used earlier to prepare silica nanotubes, in aerosol OT/n-heptane/water microemulsions containing FeCl(3). The present communication reports the remarkable effect of the amount of water in the microemulsions on the shape, size, and spectral properties of the silica nanostructures…
Octahedral and triangular platelike silver (Ag) nanocrystals were synthesized using cubic and right bipyramidal nanocrystals as seeds using a two-step preparation method. First, cubic and right-triangular bipyramidal Ag nanocrystals with {100} facets were prepared by reducing AgNO 3 in ethylene glycol (EG) in the pres…
In analogy to the electrophilicity, we define potentialphilicity indicators that represent energetically favorable ways to change the external potential of a molecule at fixed electron number. Similarly, we define a potentialphobicity to represent the least favorable way to change the external potential of a molecule.…
Abstract For the first time the synthesis of covalently linked very water‐soluble chiral perylenediimides (PDIs) is presented. The PDIs carry the amino acids alanine or lysine as imide substituents, respectively, which are coupled to Newkome‐type dendrimers acting as hydrophilic groups. The tert ‐butyl‐protected precu…
A series of isostructural compounds with formula [M(TCNQF(4))(2)(H(2)O)(6)]TCNQF(4)3 H(2)O (M=Tb (1), Y (2), Y:Tb (74:26) (3), and Y:Tb (97:3) (4); TCNQF(4)= tetrafluorotetracyanoquinodimethane) were prepared and their magnetic properties investigated. Compounds 1, 3, and 4 show the beginning of a frequency-dependent…
Abstract Biodegradable poly(butylene succinate)/carbon nanotubes nanocomposites were prepared by melt mixing process, and the influence of carbon nanotubes on the properties of the nanocomposites was investigated. Differential scanning calorimetry showed that crystallization temperature ( T c ) increase with increasin…
We obtained a solution structural model of myoglobin (Mb) formed upon the CO photolysis of MbCO by analyzing time-resolved X-ray solution scattering data. An experiment-restrained rigid-body molecular dynamics simulation was used to find the best model whose theoretical difference scattering curve gives a satisfactory…
ADVERTISEMENT RETURN TO ISSUEPREVBook ReviewNEXTGold Chemistry: Applications and Future Directions in the Life SciencesScott D. BungeView Author Information Kent State UniversityCite this: J. Am. Chem. Soc. 2009, 131, 42, 15565Publication Date (Web):September 16, 2009Publication History Published online16 September 20…
Gold (Au) nanoparticles were prepared by sputter deposition of Au metal in an ionic liquid (IL) of 1-butyl-3-methylimidazolium hexafluorophosphate (BMI-PF6). The size of Au nanoparticles was increased from 2.6 to 4.8 nm by heat treatment at 373 K. The nanoparticles uniformly dispersed in the IL were densely immobilize…
The structural, electronic, and magnetic properties of double metallocene nanowires PnM(2) (Pn = C(8)H(6), M = V, Cr, Mn, Co, and Ni) are investigated within the framework of gradient-corrected density functional theory. The PnMn(2) nanowire is predicted to be ferromagnetic while other nanowires are either antiferroma…
We performed molecular dynamics (MD) simulations of one or two copies of polyethylene glycol of molecular weight 550 (PEG550) and 5000 (PEG5000) daltons, conjugated to generation 3 (G3) to 5 (G5) polyamidoamine (PAMAM) dendrimers with explicit water using a coarse-grained model. We found the radii of gyration of these…
The multivalent salt dependent behaviors of a charged dendrimer in solution are investigated by molecular dynamics simulations with explicit free ions. We find that the charged dendrimers show a dense-core conformation together with the back-folding of terminal monomers to the interior under all the conditions studied…
Rare earth (RE) ion doped glass ceramics containing hexagonal CeF(3) nanocrystals with a mean size of 12 nm were fabricated. Using Eu(3+) as the structural probe, Stark splitting emissions and the low forced electric dipole D5(0)-->F7(2) transition of Eu(3+) revealed the partition of RE ions into low-phonon-energy CeF…