Search results for "Template synthesi"

Selective heterodimerisation of tetraurea calix[4]arenes containing four or eight ω-alkenyl groups with a tetratosyl urea calix[4]arene has been effectively used to synthesize multi-macrocycles via metathesis reaction.

StereochemistryMetals and AlloysGeneral ChemistryTemplate synthesisCombinatorial chemistryCatalysisSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialschemistry.chemical_compoundchemistryMaterials ChemistryCeramics and CompositesSalt metathesis reactionUreaChemical communications (Cambridge, England)

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Electrosynthesis of Sn-Co nanowires in alumina membranes

2010

A fabrication process of amorphous nanowires of Sn-Co alloys, based on electrodeposition into anodic alumina membranes, is described. It is shown that nanowires of tin-cobalt alloys with different compositions can be produced by varying electrodeposition time and concentration ratio of salts dissolved into the electrolytic bath. Importance of the chelating agent to produce amorphous Sn-Co alloys has also been addressed. Electrodepositions were carried out potentiostatically at -1 V versus Saturated Calomel Electrode and 60 degrees C for times ranging from 10 to 90 minutes; the atomic fraction of Co2+ in the aqueous electrolyte (Co2+/(Co2+ + Sn2+)) was varied from 0.33 to 0.67. Nanowires asp…

Tin–Cobalt Alloys Template Synthesis Alumina Membranes Li-Ion Batteries Tin AnodeMaterials scienceScanning electron microscopeAlloytechnology industry and agricultureBiomedical EngineeringNanowireAnalytical chemistryEnergy-dispersive X-ray spectroscopyBioengineeringGeneral ChemistryElectrolyteengineering.materialequipment and suppliesCondensed Matter PhysicsConcentration ratioAmorphous solidSettore ING-IND/23 - Chimica Fisica ApplicataSaturated calomel electrodeengineeringGeneral Materials Science

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Imprinted Polymers with Memory for Small Molecules, Proteins, or Crystals

2000

chemistry.chemical_classificationNanostructureMolecular recognitionchemistryMolecularly imprinted polymerNanotechnologyGeneral ChemistryPolymerTemplate synthesisImprinting (psychology)Molecular imprintingSmall moleculeCatalysisAngewandte Chemie International Edition

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Calixarenes as Stoppers in Rotaxanes

1998

The synthesis of the amide-based rotaxane 7a bearing calix[4]arene blocking groups is described for the first time. While rotaxane formation fails if a calix[4]arene is functionalized at the upper rim with only an amino or methylamino group lacking any spacer, the prolonged amine 5a works successfully as stopper unit preventing dethreading of the dimeric wheel 1a by its size. Rotaxane formation of 8b was observed only by MALDI-TOF mass spectrometry of the reaction mixture of the amine 5b, the axle 6 and 1a. With the larger trimeric wheel 1b no stable rotaxane could be obtained. It either does not act as a concave template or its opening is too wide, even for the bulky calixarene stoppers.

chemistry.chemical_compoundRotaxaneStereochemistryChemistryAmideOrganic ChemistryPolymer chemistryCalixareneAmine gas treatingPhysical and Theoretical ChemistryTemplate synthesisEuropean Journal of Organic Chemistry

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