Showing papers in "Chemical Communications in 2006"

TL;DR: The diversity of this complex class of materials is examined, a simple but systematic classification is proposed, and the growing evidence that many hybrid frameworks tend to form under thermodynamic rather than kinetic control when the synthesis is carried out under hydrothermal conditions is discussed.

TL;DR: A new microporous metal-organic framework compound featuring chiral (salen)Mn struts is highly effective as an asymmetric catalyst for olefin epoxidation, yielding enantiomeric excesses that rival those of the free molecular analogue.

TL;DR: An overview of asymmetric catalysis of carbonyl transformations via iminium ion and enamine intermediates using chiral amines as organocatalysts has been given and their recent merger in tandem sequences is discussed.

TL;DR: C and 35/37Cl NMR relaxation measurements on several model systems demonstrate that the solvation of cellulose by the ionic liquid 1-n-butyl-3-methylimidazolium chloride involves hydrogen-bonding between the carbohydrate hydroxyl protons and the IL chloride ions in a 1 ratio 1 stoichiometry.

TL;DR: A general strategy to generate biofunctional magnetic nanoparticles is highlighted, applications for these nanoparticles in protein separation and pathogen detection are illustrated, and the high sensitivity and high selectivity achieved by this system are analyzed.

TL;DR: A novel and efficient polyene-diphenylaniline dye for dye-sensitized solar cells has been synthesized and is designed for future use also in solid state devices, with triarylamine based hole conductors.

TL;DR: The solvent contained within the cylindrical one-dimensional pores of the novel three-dimensional metal organic framework Ni2(dhtp)( H2O)2.8H2O can be removed without decomposition of the network, allowing gas storage within the cavities.

TL;DR: Recent developments in task specifically functionalized imidazolium salts, which can be used for specific tasks ranging from catalysts recycling, supports for organic synthesis, catalysis, separation of specific metal ions from aqueous solution, and construction of nanostructures and ion conductive materials, have been reviewed.

TL;DR: Methods of preparing LDHs with an emphasis on the way in which particle size and morphology can be controlled with regard to specific target applications are discussed.

TL;DR: New PEG-based hydrogel materials have been synthesized by Click chemistry and shown to result in well-defined networks having significantly improved mechanical properties.

TL;DR: Aggregation in poor solvents and complexation with calf thymus DNA and bovine serum albumin turn "on" the fluorescence of tetraphenylethylene derivatives, due to the restriction of intra-molecular rotations of the dyes in the aggregates and complexes.

TL;DR: This account describes recent progress by this group and others in the development of intramolecular direct arylation of aryl chlorides, bromides and iodides in high yield as well as conditions capable of achieving intermolecular Direct Arylation with simple arenes.

TL;DR: This short Focus article is a brief personal perspective of some of the key advances in second-order NLO materials and in multiphoton-absorbing materials, and of how and why these advances have led to renewed interest in organic N LO materials.

TL;DR: The role of 4,4'-bipyridine in discovering various coordination polymers with novel topologies that range from one-dimensional to three dimensional are described.

TL;DR: Two novel porous anionic zeolite-like metal-organic frameworks have been synthesized by metal-ligand-directed assembly of rigid and directional tetrahedral building units, InN4 synthesized in situ, and doubly deprotonated bis(bidentate) imidazoledicarboxylic acid ligands (HImDC) in the presence of different structure directing agents (SDAs).

TL;DR: This work reports a new family of isoreticular MOFs, comprising three larger analogues of the nanoporous metallocarboxylate MIL-88, synthesized using a controlled SBU approach and solved using an original simulation-assisted structure determination method in direct space.

TL;DR: On-line droplet-droplet extraction occurs when a sample spray intersects a reagent electrospray; this allows continuous analysis of trace amounts of compounds directly in complex matrices including undiluted urine, milk and polluted water over extended periods of time.

TL;DR: Ionic liquids which are (weak) Lewis bases have a number of interesting and useful properties different to those of traditional ionic liquids, including volatility and the possibility of being distillable in some cases and a base catalysis effect in others.

TL;DR: High-efficiency flexible dye-sensitized solar cells were fabricated with a Ti-metal foil substrate for photo anode and using a Pt-electrodeposited counter electrode on ITO/polyethylene naphthalate (ITO/PEN); these devices were characterized by incident photon-to-current efficiency (IPCE), optical transmittance and electrical impedance spectroscopy.

TL;DR: Multi-walled carbon nanotubes have been covalently functionalized via 1,3-dipolar cycloaddition of azomethine ylides with orthogonally protected amino functions that can be selectively deprotected and subsequently modified with drugs and fluorescent probes.

TL;DR: A discussion of the unique strategy aimed at surface engineering using metalloligands, i.e., introduction of coordinatively unsaturated metal centers, is presented.

TL;DR: A number of areas where specific function has been incorporated into framework host lattices for their extreme chemical versatility are highlighted.

TL;DR: Polyaniline nanofibers are shown to form spontaneously during the chemical oxidative polymerization of aniline, and the possibility of creating nanofibrillar structures for selected polyanilines derivatives is demonstrated.

TL;DR: This article summarizes the recent advances in the crystal growth, structural control strategies and diverse structures of the binary metal imidazolate and triazolate frameworks, which are the simplest systems for crystal engineering of two- and four-connected coordination polymers.

TL;DR: Unmodified gold nanoparticles effectively differentiate unfolded and folded DNA, thus providing a novel approach to colorimetrically probe aptamer-based recognition processes.

TL;DR: It is shown that the X-ray powder diffraction pattern of the nanotubes is identical to the simulated pattern for the single crystal structure of diphenylalanine, affording a new foundation for understanding and rationalizing the properties of this remarkable organic material.

TL;DR: Some of the criteria to be considered when stating that a particular crystal structure is porous are discussed.

TL;DR: Hierarchical porous F-doped TiO2 microspheres exhibiting high visible light photocatalytic activity have been fabricated by a one-step low-temperature hydrothermal approach without using any templates.

TL;DR: Para-sulfonato-calix[n]arenes have been shown to have potential in the diagnosis of prion-based diseases and their innocuous nature, as far as is known at present, may open up their future use in medications.

TL;DR: Genuine, nondegraded PAMAM dendrimers self-assemble with siRNA into nanoscale particles that are efficient for siRNA delivery and induce potent endogenous gene silencing.