Search results for "Langmuir-Schaefer film"

showing 4 items of 4 documents

LANGMUIR-SCHAEFER FILMS OF A NEW CALIX[4]PYRROLE-BASED MACROCYCLE EXHIBITING INDUCED CHIRALITY UPON DIFFERENTIATED BINDING WITH CHIRAL ALCOHOL VAPOURS

2004

LangmuirLangmuir-Schaefer filmAlcoholPhotochemistrymedicine.diseaseCalix[4]pyrolechemistry.chemical_compoundchemistrymedicineLangmuir-Schafer filmchiral alcohol sensorscalixpyrroleChirality (chemistry)VapoursPyrroleSensors and Microsystems
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Ethane-Bridged Zinc-Porphyrin Dimers in Langmuir-Shäfer Thin Films: Structural and Spectroscopic Properties

2006

This work reports on the structural and spectroscopic properties of ethane-bridged Zn porphyrin dimers (1) in Langmuir-Scha¨fer (LS) thin films by combining scanning force microscopy (SFM) with film balance, UV-vis absorption, fluorescence, and nanosecond laser flash photolysis measurements. Results show that depending on the surface pressure the Langmuir films of pure 1 can be arranged in two different condensed phases, whereas SFM of the LS films shows characteristic fractal networks constituted by nanoscopic aggregates. The spectral findings agree with a picture in which 1 is apparently present in the anti conformation but aggregated in a sort of H-type structure whose optical features r…

LangmuirPorphyrinsLangmuir-Schaefer filmPhotochemistryporphyrin dimerPorphyrinSurfaces Coatings and Filmscircular dichroismchemistry.chemical_compoundCrystallographychemistryUltrafast laser spectroscopyMaterials ChemistryArachidic acidFlash photolysisPhysical and Theoretical ChemistryAbsorption (chemistry)Thin filmChiralityUV-vis absorptionConformational isomerismfluorescence and nanosecond laser flash photolysis measurements
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Supramolecular Design of Low-dimensional Carbon Nano-hybrids encoding a Polyoxometalate-bis-Pyrene Tweezer

2014

A novel bis-pyrene tweezer anchored on a rigid polyoxometalate scaffold fosters a unique interplay of hydrophobic and electrostatic supramolecular interactions, to shape carbon nanostructures (CNSs)-based extended architectures.

Materials Chemistry2506 Metals and AlloysSurfaces Coatings and FilmCarbon nanotubelaw.inventionCatalysiCoatings and Filmschemistry.chemical_compoundlawhybrid materialsMaterials ChemistryCarbon nanostructures; recognition; hybrid materials; polyoxometalatesMaterials Chemistry2506 Metals and AlloyPyrenesPyreneElectronic Optical and Magnetic MaterialChemistry (all)Metals and AlloysTungsten CompoundsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsSurfacesSpectrophotometryPolyoxometalatePyrenerecognitionLangmuir-Schaefer filmsHybrid materialHydrophobic and Hydrophilic InteractionsCarbon nanostructuresMaterials scienceStatic ElectricitySupramolecular chemistrychemistry.chemical_elementNanotechnologyCeramics and CompositeCarbon nanotubeCatalysisNano-ElectronicpolyoxometalatesChemistry (all); Catalysis; Ceramics and Composites; Electronic Optical and Magnetic Materials; Surfaces Coatings and Films; Materials Chemistry2506 Metals and Alloys; 2506Optical and Magnetic Materialscarbon nanotubeHybrid materialPolyoxometalateGeneral ChemistryCarbon nanostructuresCarbonNanostructureschemistryCeramics and Composites2506Supramolecular chemistryCarbon
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Ultra-thin film sensors based on porphyrin-5-ylphosphonate diesters for selective and sensitive dual-channel optical detection of mercury(II) ions

2020

International audience; Reusable dual-channel optical sensors for Hg2+ ions were prepared by Langmuir-Schaefer (LS) method from amphiphilic (trans-A2)BC-type porphyrins functionalized at meso-positions of the tetrapyrrolic macrocycle by sterically demanding diethoxyphosphoryl and mesityl groups as well as electron donating RO, RS or RNH substituents (R = n-C8H17). These three novel amphiphilic porphyrin derivatives were synthesized in good yields and their floating films at the air⎯water interface were investigated. In these monolayers, porphyrin molecules display a slipped stack-of-card orientation, but their strong π stacking is prohibited by bulky diethoxyphosphoryl and mesityl groups. T…

Materials scienceGeneral Chemical EngineeringHeteroatomSubstituentStacking02 engineering and technology010402 general chemistryPhotochemistry01 natural sciencesAbsorbancechemistry.chemical_compoundMonolayerMolecule[CHIM]Chemical Sciencesdual-channel optical sensorLangmuir monolayersolid thin-film sensorHydrogen bondProcess Chemistry and TechnologyLangmuir-Schaefer filmmercury(II) detection021001 nanoscience & nanotechnologyPorphyrin0104 chemical scienceschemistry13. Climate action0210 nano-technologyporphyrin
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