Materials Literature
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Hexaamide receptor 4 and coumarin phosphate 5 form an ensemble for effective sensing of geranyl pyrophosphate (GPP). Fluorescence resonance energy transfer in the 4 + 5 ensemble diminishes when 5 is replaced by GPP. Receptor 4 binds selectively with GPP over other anions, including fatty acids. The 4-GPP complex in 1:…
Bis(trialkylsilyl) precursor was used to modify polymer membranes for the first time. Novel organic-inorganic hybrid membranes of poly(vinyl alcohol) (PVA)/1,2-bis(triethoxysilyl)ethane (BTEE) were prepared through a sol-gel method for pervaporation dehydration of ethanol. The permeability and selectivity of the membr…
We report an unexpected result obtained using chemical mapping on the new, aberration corrected Nion UltraSTEM at Daresbury. Using different energy windows above the L2,3 edge in 011 silicon to map the position of the atomic columns we find a contrast reversal which produces an apparent and misleading translation of t…
Alginate gel layers containing viable cells with adjacent bioactive polyelectrolyte multilayers are fabricated, and their bioactivity is shown to originate mainly from the degradation of the cells. Alternate biofunctionalized multilayers and cell-containing layers are shown to be an essential step toward fabrication o…
Chemical vapor deposition (CVD) co-polymerization was used to fabricate polymer coatings, which comprise of reactive surface composition gradients. Two functionalized derivatives of [2.2]paracyclophane were fed into a two-source CVD system at a 180 ° angle, then copolymerized and deposited as a polymer gradient. Infra…
Diends-azido-terminated and diends-alkynyl-terminated poly(ethylene oxide)- b -poly(propylene oxide)- b -poly(ethylene oxide) triblock copolymers (N 3 -PEO- b -PPO- b -PEO-N 3 and HC≡C-PEO- b -PPO- b -PEO-C≡CH) were respectively prepared and used together as the precursors for multiblock copolymer synthesis through co…
This manuscript describes a simple one-pot reaction that affords cuboid iron−manganese oxide nanoparticles with unprecedented dimensions as large as 33 ± 5 nm (average body-centered diagonal) in monodisperse form. Our unique synthetic method, which requires no multiple growth steps typical of other methods, utilizes t…
A noncovalent strategy is proposed for endowing responseless catanionic surfactant (a mixture of cationic and anionic surfactants) aggregates with responsive abilities by addition of a responser. In this strategy, the composition of catanionic surfactant can be carefully selected to render aggregates sensitive to adde…
Hydroxyacid dehydrogenases of lactic acid bacteria, which catalyze the stereospecific reduction of branched-chain 2-keto acids to 2-hydroxyacids, are of interest in a variety of fields, including cheese flavor formation via amino acid catabolism. In this study, we used both targeted and random mutagenesis to identify…
A novel, single-walled coordination nanotube [CuSCN(L)]·(DMF)0.5 (L = 1,3-di(pyridin-4-yl)propane, DMF = N,N-dimethylformamide) was easily prepared using two bidentate ligands and characterized by single crystal X-ray diffraction, which shows guest exchange properties and strong photoluminescence at room temperature.
Developing processes for the conversion of biomass for use in transportation fuels production is becoming a critically important economic and engineering challenge. Dilute acid pretreatment is a promising technology for increasing the enzymatic digestibility of lignocellulosic biomass. However, a deeper understanding…
The group 5−7 transition metal oxides (V 2 O 5, CrO 3, MoO 3, WO 3, and Re 2 O 7 ) were anchored on a surface modified SiO 2 support containing surface alumina, zirconia, and titania species prepared via incipient wetness impregnation of soluble precursors and calcination. The molecular and electronic structures of th…
The fundamental mechanisms by which biomolecular motors drive the assembly and disassembly of the composite ring structures are characterized in this study. This system provides an enabling model of how the collective behavior of energy-dissipating and thermodynamic processes may be used to drive the dynamic assembly…
A series of dichalcogenophosphinato [Ag(Se2PiPr2)] (1), [Ag(SSePiPr2)]4 (2), and imidodichalcogenodiphosphinatosilver(I) [Ag{iPr2P(S)NP(Se)iPr2}]3 (3) [Ag{(SePiPr2)2N}]3 (4) complexes were synthesised; (2) and (3) were characterised by X-ray single crystallography. Complex (2) has a tetrahedral arrangement of four sil…
Using trans -stilbene-4,4′-dicarboxylic acid (H 2 STDC) as bridging ligand, we have prepared four new coordination polymers with different transition metal ions, [Cu(STDC)(H 2 O)(py) 2 ]·2py ( 1 ), [Cd(STDC)(py) 2 ]·0.5py ( 2 ), [Co(STDC)(py) 2 ]·0.5py ( 3 ), and [Ni 2 (STDC) 2 (py) 4 (H 2 O)]·py·0.5H 2 O ( 4 ), by hy…
Variability in the chemical composition of surface properties of various wood fibers (eastern white cedar, jack pine, black spruce, and bark) was investigated using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and X-ray photoelectron spectroscopy (XPS). Both DRIFTS and XPS showed high variabili…
Low-voltage organic thin-film transistors were fabricated to investigate the stability of organic semiconductors in water and determine the critical parameters for aqueous phase chemical detection. We showed that the molecular structure, alkyl-chain length, and thin-film morphology strongly influence the electrical ch…
We have demonstrated n-type organic thin-film transistors (OTFTs) based on solution-processable perfluoroalkyl-substituted C60 derivatives. C60PC12F25-based OTFTs exhibit high electron mobility of 0.25 cm2/(V s) and can operate in air. We found that introduction of a long-chain perfluoroalkyl group to C60 is effective…
Hydrolysis of acetylthiocholine mediated by acetylcholine esterase yields the thiol-bearing compound thiocholine. At trace concentrations, thiocholine modulates the growth of Au-Ag nanoparticles on seeding gold nanoparticles in the presence of ascorbic acid. Inhibition of the enzyme by 1,5-bis(4-allyldimethylammoniump…
This article presents an evaluation of frictional and wear performance of new polyester composites based on coir fibres. Coir fibre-reinforced polyester (CFRP) composites were developed in a multi-layer form, mainly in three and four layers. The influence of the coir fibres on the wear and frictional behaviour of poly…