Showing papers in "Chemical Communications in 2008"

TL;DR: Binaphthol-derived monophosphoric acids have been designed as novel chiral Brønsted-acid catalysts, which function as efficient enantioselective catalysts for a variety of organic transformations, especially for carbon-carbon bond forming reactions.

TL;DR: Functionalization via covalent grafting of organic functions allows to tune the redox and acid-base properties, and the solubility of polyoxometalates, to enhance their stability and biological activity and to reduce their toxicity.

TL;DR: A simple and facile method was developed to prepare fluorescent carbon nanocrystals (CNCs) with low cytotoxicity and no photobleaching, by electrooxidation of graphite in aqueous solution.

TL;DR: An indoline dye (D205), the synthesis method of which is disclosed in this report, gave high-efficiency organic dye-sensitized solar cells (9.52%) using an anti-aggregation reagent (chenodeoxycholic acid).

TL;DR: The optimisation of enzyme properties using in vitro evolution and improvement of their operational stability by immobilisation as cross-linked enzyme aggregates (CLEA) are presented and the biocatalytic aerobic oxidation of starch to carboxy starch is presented as an example of green chemistry in optima forma i.e. a biocompatible product from a renewable raw material using a biocesealytic air oxidation.

TL;DR: Cinchona alkaloid derivatives modified to include a (thio)urea component have emerged in the last three years as readily accessible, robust and tunable bifunctional organocatalysts for a range of synthetically useful transformations.

TL;DR: A DNA-based Ag(i) sensor was developed that employed an oligodeoxyribonucleotide containing C-C pairs used for Ag( i) binding sites that unexpectedly stabilized DNA duplexes containing the naturally occurring cytosine-cytosine (C-C) mismatch-base pair.

TL;DR: Main research trends on hydrogen storage materials, including metal hydrides, porous adsorbents and hydrogen clathrates, are reviewed with a focus on recent developments and an appraisal of the challenges ahead.

TL;DR: Electrodeposited Ni(OH)(2) on nickel foam with porous and 3D nanostructures has ultrahigh capacitance in the potential range -0.05-0.45 V, and a maximum specific capacitance as high as 3152 F g (-1) can be achieved in 3% KOH solution at a charge/discharge current density of 4 A g(-1).

TL;DR: This work focuses on some selected examples of Cu(I, Ag(I), Au(I%), Zn(II) and Cd( II) luminescent complexes to suggest some possible routes towards promising and unprecedented emitting materials.

TL;DR: This Feature Article examines recent advances in chemical analyte detection and optical imaging applications using gold and silver nanoparticles, with a primary focus on the authors' own work.

TL;DR: The combination of some three-atom bridges with paramagnetic 3d transition metal ions results in the systematic isolation of molecular magnetic materials, ranging from single-molecule and single-chain magnets to layered weak ferromagnets and three-dimensional porous magnets.

TL;DR: A very high catalytic activity in the cyanosilylation reaction was observed for MIL-101, a chromium based metal-organic framework, which is a remarkably stable support for palladium in hydrogenation reactions, with significantly higher activity than e.g. palladium on activated carbon.

TL;DR: An overview of the use of chemoselective reactions such as Heck, Sonogashira and Suzuki coupling, Diels-Alder cycloaddition, Click chemistry, Staudinger ligation, Michael's addition, reductive alkylation and oxime/hydrazone chemistry for the convergent synthesis of peptide/protein-polymer conjugates is given.

TL;DR: Using ZnO nanonails, a hydrazine electrochemical sensor has been fabricated, for the first time, which showed a high and reproducible sensitivity and the limit of detection (LOD) was estimated to be 0.2 microM.

TL;DR: Hydrolases show good catalytic activity in deep eutectic solvents, despite the presence of urea, which can denature enzymes, or alcohols, which could interfere with hydrolase-catalyzed reactions.

TL;DR: The nickel oxide nano-flakes materials prepared by a facile approach maintain high power density at high rates of discharge and have excellent cycle life, suggesting their potential application in supercapacitors.

TL;DR: A DNA-Au NP probe for sensing Hg2+ using the formation of DNA-HG2+ complexes through thymidine (T)-Hg2- -T coordination to control the negative charge density of the DNA strands by varying their structures-adsorbed onto Au NPs.

TL;DR: In this paper, a core-shell-corona polymer micelles bearing glutathione-cleavable shell cross-links are presented, which allow the facilitated release of entrapped anticancer drugs at cytoplasm in response to an intracellular glutathion level.

TL;DR: The microporous metal-organic framework Ni(2)( dhtp) (H(4)dhtp=2,5-dihydroxyterephthalic acid) shows distinct end-on CO(2) coordination to coordinatively unsaturated nickel sites giving rise to high CO( 2) adsorption capacity at sub-atmospheric pressures and ambient temperatures.

TL;DR: The Lewis acid B(C(6)F(5))(3) has been found to be an efficient catalyst for the direct hydrogenation of imines and the reductive ring-opening of aziridines with H(2) under mild conditions.

TL;DR: This work presents the rapid synthesis of nanocrystals of a fluorescent microporous metal-organic framework using an ultrasonic method, and their utility for selective sensing of organoamines.

TL;DR: A fluorophore dyad (FD8) containing rhodamine and a naphthalimide moiety was synthesized as a Cr3+-selective fluorescent probe for monitoringCr3+ in living cells with ratiometric fluorescent methods.

TL;DR: High selectivities for CO(2) over CH(4) are obtained in carborane-based metal-organic framework materials with and without coordinatively unsaturated metal sites, especially in the material with open metal sites.

TL;DR: This article summarizes experimental and theoretical evidence for the existence of four distinct binding modes for complexes of anions with charge-neutral arenes, including C-H hydrogen bonding and three motifs involving the arene-pi system-the noncovalent anion-pi interaction, weakly covalent sigma interaction, and strongly covalents interaction.

TL;DR: In this paper, multiwalled carbon nanotube aqueous dispersions using block copolymers are able to form supramolecular complexes with the aromatic chromophore and anticancer agent doxorubicin via pi-pi stacking and enhance its cytotoxic activity.

TL;DR: High quality MOF-5 crystals of 5-25 mum in size were prepared for the first time using a sonochemical method in substantially reduced synthesis time compared with conventional solvothermal synthesis.

TL;DR: The reversibility and concentration dependence of the cloud points were evaluated to assess the potential of these copoly(2-oxazoline)s as alternatives to poly(N-isopropylacrylamide).

TL;DR: Interaction with electron-donor and -acceptor molecules such as aniline and nitrobenzene brings about marked changes in the D, G, G' and 2D bands of the Raman spectrum and the electronic structure of graphene, prepared by the exfoliation of graphitic oxide.

TL;DR: A heteroleptic polypyridyl ruthenium complex, cis-Ru(4,4'-bis(5-octylthieno[3,2-b]thiophen-2-yl)-2,2'-bipyridine)(4, 4'-dicarboxyl-2, 2'-bIPyridine)2, has been synthesized and demonstrated as a highly efficient sensitizer for a dye-sensitized solar cell