Showing papers in "Chemical Communications in 2005"

TL;DR: The organic functionalisation of carbon nanotubes can improve substantially their solubility and biocompatibility profile, and they hold currently strong promise as novel systems for the delivery of drugs, antigens and genes.

TL;DR: This article overviews recent work in this area which has led it to believe that much of the catalytic activity, electron transfer and chemical reactivity of graphitic carbon electrodes is at surface defect sites, and in particular edge-plane-like defect sites.

TL;DR: The conditions required for supramolecular electronics, e.g. nano-sized optoelectronic devices, will be illustrated on the basis of the programmed self-assembly of pi-conjugated systems into individual nanosized wires.

TL;DR: Initial studies on amino acids and nucleotides suggest that kinetic and thermodynamic control over a wide spectrum of reactions of Ru(II) arene complexes with biomolecules can be achieved.

TL;DR: The ruthenium complex bis-tetrabutylammonium cis-dithiocyanato-N,N'-bis-2,2'-bipyridine-4-carboxylic acid, 4'-carboxylate ruthene(II), N-719, was found to block the dark current of dye sensitized solar cells (DSC), based on mesoporous TiO2 films deposited on a F-doped tin oxide

TL;DR: Polymeric building blocks containing terminal azide and alkyne functionalities are prepared via atom transfer radical polymerization (ATRP) and used to modularly synthesize block copolymers via 1,3-dipolar cycloaddition reactions, which are quantitative according to SEC measurements.

TL;DR: Mesoporous carbons with ordered channel structure (COU-1) have been successfully fabricated via a direct carbonization of an organic-organic nanocomposite.

TL;DR: Self-powered completely synthetic nanorotors have been prepared from barcoded gold-nickel nanorods having the gold end anchored to the surface of a silicon wafer; constant velocity circular movements are observed when hydrogen peroxide fuel is catalytically decomposed to oxygen at the unattached nickel end of the nanorod.

TL;DR: Hydrogen bonds, X-H...A, formed by weak donors and acceptors, were generally dismissed as being of little consequence before and even during the 1970s but during the two following decades they were implicated as being significant in many small molecule crystal structures, and also in solution.

TL;DR: It is argued that solvent-less reactions involving molecular crystals represent a green route to supramolecular solid-state chemistry and crystal engineering.

TL;DR: The sequential injection of hyaluronic acid-tyramine conjugates and enzymes forms biodegradable hydrogels in vivo by enzyme-induced oxidative coupling, offering high potential as a promising biomaterial for drug delivery and tissue engineering.

TL;DR: A family of biocompatible ionic liquids which are able to dissolve significant amounts of proteins such as cytochrome c and in which ATR-FTIR spectroscopy results show retention of secondary structure to extreme temperatures are reported.

TL;DR: Thiourea derivative was identified as the most effective bifunctional organic catalyst and found to induce high enantioselectivity in the malonate ester Michael addition reaction to a range of nitro olefins.

TL;DR: Desorption electrospray ionization (DESI) mass spectrometry is used to detect trace amounts of explosives present on a variety of ambient surfaces in 5-second analysis times without any sample preparation.

TL;DR: Unsymmetrical dendrimers, containing both mannose binding units and coumarin fluorescent units, have been prepared using click chemistry and shown to be highly efficient, dual-purpose recognition/detection agents for the inhibition of hemagglutination.

TL;DR: Silver nanoparticles fabricated in Hepes buffer exhibit potent cytoprotective and post-infected anti-HIV-1 activities toward Hut/CCR5 cells.

TL;DR: A selective fluorescent chemodosimeter for mercury ion based on the mercury-promoted intramolecular cyclic guanylation of thiourea connected on 1, 8-naphthalimide is described.

TL;DR: The palladium-catalyzed cross-coupling reaction between organoboranes and organic electrophiles in the presence of base offers a powerful and general methodology for forming carbon-carbon bonds.

TL;DR: Detailed structures of molecular crystals cannot yet be predicted with consistent accuracy, but the strategy of molecular tectonics offers crystal engineers a powerful tool for designing molecules that are predisposed to form crystals with particular structural features and properties.

TL;DR: By focusing on the Suzuki reaction, it is shown how these two methods, used alone or together, can impact modern synthetic chemistry, making reactions faster, easier and cleaner.

TL;DR: Recycling of homogeneous catalysts could be achieved by using magnetic nanoparticles and solid-phase beads, but nanoparticle-supported catalysis proceeded much faster than its counterpart on resins.

TL;DR: Investigations on new catalyst systems and their application in organic synthesis are summarized.

TL;DR: High-resolution 13C NMR studies of cellulose and cellulose oligomers dissolved in the ionic liquid (IL) 1-butyl-3-methylimidazolium chloride ([C4mim]Cl) show that the beta-(1-->4)-linked glucose oligomers are disordered and have a conformational behavior which parallels the one observed in water, and thus, reveal that the polymer is disordered in IL solution as well.

TL;DR: Two families of a new generation of ionic liquids, in which the chiral cations are directly derived from naturally occurring alpha-amino acids and alpha- amino acid ester salts, have been obtained via very simple preparations.

TL;DR: The recognition of proteins by aptamer-modified electrode transducers reverses the surface charge and leads to a novel label-free impedance spectroscopy bioelectronic detection protocol based on a decrease in the electron transfer resistance.

TL;DR: The critical nature of charge transport is discussed in the context of the relative energies of the organic polymer-based and metal-centered redox processes.

TL;DR: This work reports the nanoscale loading and confinement of aquated Gd3+n-ion clusters within ultra-short single-walled carbon nanotubes (US-tubes) that are linear superparamagnetic molecular magnets with Magnetic Resonance Imaging (MRI) efficacies 40 to 90 times larger than any Gd 3+-based contrast agent (CA) in current clinical use.

TL;DR: In this article, a fabrication process for constructing polymer surfaces with multiwalled carbon nanotube hairs, with strong nanometer-level adhesion forces that are 200 times higher than those observed for gecko foot-hairs, is described.

TL;DR: Surfactant-free oil-in-water emulsions prepared with temperature and pH sensitive poly(N-isopropylacrylamide)(PNIPAM) microgel particles offer unprecedented control of emulsion stability.

TL;DR: Water-soluble luminescent CdSe quantum dots surface-modified with 2-mercaptoethane sulfonate were synthesized for the selective determination of free cyanide in aqueous solution with high sensitivity via analyte-induced changes in their photoluminescence after photoactivation.