Showing papers in "Chemical Communications in 1997"

TL;DR: A brief account of the results obtained since work started in this area in early 1995 is given, and the prospects for the use of β-peptides as drugs, the construction of large, enzymatically-active β-proteins and their interaction with the natural, α- peptidic counterparts are discussed.

TL;DR: In this paper, a black trithiocyanato-ruthenium(II) terpyridylII complex was used to enhance the sensitization of nanocrystalline TiOI to solar cells.

TL;DR: In this article, the properties and functions of weak hydrogen bonds have been investigated systematically using crystal correlation studies, with a focus on results obtained by correlation studies with respect to crystal correlation.

TL;DR: In this article, the prediction of the crystal structure of a given organic molecule may be more gainfully reversed so that retrosynthetic analysis of a target crystal network leads to the identification of molecular precursors.

TL;DR: The stereochemical outcome on processing fluorinated substrate proteins by enzymes can often be controlled by electronic and tabletopoelectronic factors associated with the fluorine atom as mentioned in this paper, such as fluorine atoms.

TL;DR: Magnesium oxide is an efficient catalyst for the cycloaddition of carbon dioxide to epoxides under mild conditions; the reaction of carbon======ウスdioxide with (R)-styrene oxide in the presence of magnesium oxide======ウスgives(R)-phenyl carbonate in 97% ee with retention of======¯¯¯¯stereochemistry as mentioned in this paper.

TL;DR: Ordered organo-silica-surfactant mesophases containing======covalently linked functionalized moieties are prepared with MCM-41-type architectures by template-directed co-condensation of tetraethoxysilane======and organotrialkoxysilianes (RO)============ 3======

TL;DR: In this article, a chiral (salen)Mn,Mn and III======..............III======The chiral Jacobsen's catalyst is prepared inside the supercages of zeolite Y, showing catalytic activity very similar to that of the======¯¯chloride complex in the homogeneous phase.

TL;DR: In this article, it was shown that the PCPIrH2 [PCP = η3-C6H3(PBut2)2-1,3] catalyzes the efficient (several hundred mol product/mol catalyst) dehydration of alkanes under reflux to give the corresponding alkenes and dihydrogen.

TL;DR: In this article, the synthesis of a new series of dimeric surfactants is reported; chain length and dissymmetry are shown to be critical factors for the richness of phases observed in water.

TL;DR: Partial recrystallization of the interporous aluminosilicate surface of MCM-41 and HMS by ion-exchanged tetrapropylammonium template results in a mesoporous material with surface-tectosilicates structures giving enhanced acidity and catalytic cracking activity.

TL;DR: In this paper, a post-synthesis route through which various metal elements can be grafted onto siliceous frameworks using non-aqueous solutions of AlCl3, Al(NO3)3, SnCl2, Zn(O2CMe)2 Mn(O 2CMe), etc., is developed as a generalised means to obtain mesoporous metallosilicates molecular sieves with various structures such as MCM-41 (hexagonal), MCM48 (cubic Ia3d), SBA-1 (c

TL;DR: Ruthenium(II) is a stable catalyst for alkene oxidation by tert-butyl hydroperoxide with high product turnover this article, and is used in this article.

TL;DR: Aminopropyl-functionalised MCMs, prepared via a one-pot method, were found to be effective base catalysts for the Knoevenagel reaction as mentioned in this paper.

TL;DR: In this paper, a three-dimensional network based upon a cyclobutane-linked tetrapyridyl ligand was constructed by 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,20,21,22,23,24,25,26,27,28,29,30,31,33,34

TL;DR: Asymmetric manganese salen epoxidation catalysts are assembled and trapped in a multistep synthesis in the cages of zeolite EMT; these asymmetric menganese heterogeneous catalysts produce high enantiomeric excess in the biochemical synthesis of aromatic alkenes with NaOCl as discussed by the authors.

TL;DR: Gold exhibits very high catalytic activities, comparable with that of a conventional Cu/ZnO/Al catalyst, for forward and reverse water-gas shift reactions when supported on titanium oxide by the deposition-precipitation method.

TL;DR: The use of a catalytic amount of 3-cyanopyridine in the catalytic catalysts for terminal alkenes with aqueous hydrogen peroxide resulted in the formation of many functionalized epoxides in high yields.

TL;DR: In this paper, an electrochemical gene sensing system was developed using a======redox-active ferrocene-modified oligonucleotide and an oligonotide anchored on a gold electrode, both of which formed a sandwich-type ternary complex with the target DNA to give a redox current.

TL;DR: In this article, the acid-facilitated transfer of well characterized particles in a hydrosol to a toluene layer containing the thiol was described, and the resulting nanoparticles of Au, Pt and Ag formed superstructures.

TL;DR: In this paper, a simple procedure is presented that is used to synthesise, for the first time, pure mixed phenanthroline copper(I) complexes that do not exchange ligands.

TL;DR: In this article, a new approach to generating supramolecular architectures, based on inexpensive and easy-to-prepare imine ligands, is described together with its application to the self-assembly of three-helicates.

TL;DR: In this article, the molybdenum oxide monomers, clusters and chains linked by======bpy-bpy groups and represented by the============formulae [M(bpy)-bpy)================== x======

TL;DR: In this paper, the authors describe the factors influencing the observed structures of interpenetrating networks in the context of bipyridyl ligands in interlocking copper-heterocycle adamantoid arrays.

TL;DR: Functionalized gluconamides and their metal complexes are shown to give substantiallysupramolecular assemblies, in some cases chiral, and to form organogels in a large variety of organic solvents, e.g. methacrylate mixtures, which can be polymerized, as well as o-xylene, chloroform, ethyl======acetate, ethanol and tetrahydrofuran as mentioned in this paper.

TL;DR: In this paper, Dimethyl oxalate is efficiently hydrogenated to ethylene glycol under mild conditions using a======ruthenium catalyst based on Ru(acac)======�

TL;DR: Bis(pinacolato)diboron selectively adds to terminalAlkenes and cyclic alkenes having internal strain to provide bis(boryl)alkanes in 76–86% yields in the presence of a catalytic amount of Pt(dba) at 50 °C.

TL;DR: In this article, the solid-state chemistry of intercalation compounds that underpins a revolutionary new rechargeable lithium battery which has recently achieved phenomenal commercial success is described. And the basic operation of the cell is summarised briefly and the structure/property relationships are developed that are important for the solidstate chemist when attempting to design and synthesise new lithium inter calcation compounds capable of operating as positive electrodes.

TL;DR: In this article, a zeolite membrane grown hydrothermally on the surface of a porous gelatin substrate showed a high alcohol selectivity in pervaporation, a membrane-based liquid separation process, of alcohol-benzene, cyclohexane or methyl tert-butyl ether.

TL;DR: Diborane(4) compounds react with α,β-unsaturated ketones to give the 1,4-addition product in the presence of a platinum catalyst at 80 °C as discussed by the authors.