Materials Literature
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A family likeness: The seven-sided homologue of kekulene, septulene (see structure), has been synthesized in seven steps by ring-closing metathesis. Its properties (spectroscopic and structural) are strikingly similar to those of kekulene despite its sevenfold symmetry and resulting non-alternant structure. The chair-…
Abstract The simplicity and versatility of hydrazone crosslinking has made it a strategy of choice for the conjugation of bioactive molecules. However, the labile nature of hydrazone linkages and reversibility of this coupling reaction restricts its full potential. Based on the fundamental understanding of hydrazone s…
Alkaline-earth metal ions were used to tune four new heterometallic frameworks, {[Cd(2.07)Mg(0.93)(BTC)(2)(H(2)O)(4)]·2H(2)O}(n) (1), {[Cd(2)Ca(BTC)(2)(H(2)O)(4)]·2H(2)O}(n) (2), {[Cd(2)Sr(BTC)(2)(H(2)O)(5)]·H(2)O}(n) (3) and [Cd(6)Ba(3)(BTC)(3)(H(2)O)(10)](n) (4) (H(3)BTC = 1,3,5-benzenetricarboxylic acid), synthesiz…
How to make super latt(ic)e: Monodispersed octahedral microcrystals of a zirconium-carboxylate metal-organic framework (MOF), UiO-66, were synthesized, under optimized experimental conditions, by using acetic acid as a modulator. Due to their uniform size and shape, the obtained MOF microcrystals can be assembled not…
Controlling the morphology of Pt-based nanomaterials can be an effective way to improve the catalytic activity on a mass basis. Herein we demonstrate for the first time the synthesis of monodispersed core-shell AgPd@Pt nanoparticles with multiply twinned structures. These multiply twinned particles (MTPs), which posse…
A perfect fit: Cavity-conform bimetallic Ni/Pd nanoparticles of different composition were generated in the metal–organic framework MIL-101. Experimental evidence and molecular dynamic simulations indicate the existence of mixed bimetallic particles. Pronounced synergistic effects have been observed in liquid-phase ca…
Abstract Renewable resources, such as kraft lignin, have shown great potential as precursors for carbon fiber production. This manuscript reports an investigation into the stabilization of softwood kraft lignin (SKL) fibers and the determination of the difference in stabilization between hardwood‐ and softwood‐based k…
Surface analysis: In situ total-reflection fluorescence X-ray absorption spectroscopy showed that reduction of cobalt at the surface of a LiCoO2 electrode occurs by contact with a liquid electrolyte. An irreversible behavior was observed at the surface of LiCoO2 during a first charge/discharge process whereas the bulk…
Brought to light: Ag2S–Ag hybrid nanotubes were synthesized by rapid microwave-assisted sulfidation of Ag2CO3 nanorods. The relative amounts of Ag2S and Ag in the hybrid structure can be controlled easily by varying the concentration of the sulfur precursor. The optimized Ag2S–Ag hybrid structure has superior photocat…
Abstract Although catalytic reductions, cross‐couplings, metathesis, and oxidation of CC double bonds are well established, the corresponding catalytic hydroxylations of CH bonds in alkanes, arenes, or benzylic (allylic) positions, particularly with O2, the cheapest, “greenest”, and most abundant oxidant, are severe…
Abstract Due to the high costs, slow reaction kinetics, and methanol poisoning of platinum‐based cathode catalysts, designing and exploring non‐Pt or low‐Pt cathode electrocatalysts with a low cost, high catalytic performance, and high methanol‐tolerance are crucial for the commercialization of fuel cells. Here, a fac…
Recent experimental studies on supported lipid bilayers and giant vesicles have shown that uni-lamellar membrane systems can undergo spontaneous tubulation, i.e., can form membrane tubules or nanotubes without the application of external forces. In the case of supported lipid bilayers, the tube formation was induced b…
Published literature has been reviewed in order to (a) explore the (potential) applications of nanotechnology in pesticide formulation, (b) identify possible impacts on environmental fate, and (c) analyze the suitability of current exposure assessment procedures to account for the novel properties of nanopesticides wi…
A three-dimensional Ni foam deposited with graphene layers on surfaces is used as a conducting solid support to load MoS(x) catalysts for electrocatalytic hydrogen evolution. The graphene sheets grown on Ni foams provide robust protection and efficiently increase the stability in acid. The superior performance of hydr…
The effect of foaming methods on the linear and nonlinear rheological properties is studied employing foams prepared from aqueous solutions of sodium laurate. It is found that the liquid-phase fraction of the foam prepared by a foaming net is significantly lower than that by a conventional mixer. Consequently, the foa…
Electrical transport properties of (La(1-x)X(x))MnO(3) (X = Ca, Sr), which exhibits the so-called colossal magnetoresistance (CMR) effect, are investigated in the framework of linear response theory combined with first-principles calculation. The calculation is performed by applying the coherent potential approximatio…
A donor–acceptor–donor triad, which exhibits fluorescence on-off switching with high contrast ratio (ca. 1000) in response to mechanical stimulus in the solid state, is reported by Soo Young Park and co-workers on page 5487. This system provides a very unique example of high contrast fluorescence switching that is dri…
Nanostructured carbon (ns-C) films fabricated by stabilization and pyrolysis of diblock copolymers are of interest for a variety of electrical/electronic applications due to their chemical inertness, high-temperature insensitivity, very high surface area, and tunable electrical resistivity over a wide range [Kulkarni…
Carbon nanotubes offer exciting opportunities for devising highly-sensitive detectors of specific molecules in biology and the environment. Detection limits as low as 10(-11) M have already been achieved using nanotube-based sensors. We propose the design of a biosensor comprised of functionalized carbon nanotube pore…
The photocontrolled phase transitions and reflection behaviors of a smectic liquid crystal, 4-octyl-4'-cyanobiphenyl (8CB), tuned by a chiral azobenzene, are systematically investigated. For the smectic 8CB doped with the chiral azobenzene (1R)-(-)-4-n-hexyl-4'-menthylazobenzene (ABE), the initial smectic phase can be…