Search results for "Emission quenching"

showing 2 items of 2 documents

Colloidal Nanoplatelet/Conducting Polymer Hybrids: Excitonic And Material Properties

2016

WOS:000370678700053 Here we present the first account of conductive polymer/colloidal nanoplatelet hybrids. For this, we developed DEH-PPV-based polymers with two different anchor groups (sulfide and amine) acting as surfactants for CdSe nanoplatelets, which are atomically flat semiconductor nanocrystals. Hybridization of the polymers with the nanoplatelets in the solution phase was observed to cause strong photoluminescence quenching in both materials. Through steady-state photoluminescence and excitation spectrum measurements, photoluminescence quenching was shown to result from dominant exciton dissociation through charge transfer at the polymer/nanoplatelet interfaces that possess a sta…

Excitation spectrumMaterials sciencePhotoluminescenceSulfideDEH-PPV-Based PolymersSulfideExcitonCdSe NanoplateletsNanotechnology02 engineering and technologySurface active agents010402 general chemistryOptoelectronic devices01 natural sciencesDissociation (chemistry)ColloidCharge transferQuenchingHybrid optoelectronic devicesPhysical and Theoretical ChemistryPhotoluminescenceSulfur compoundsAmineSemiconductor nanocrystalsConductive polymerchemistry.chemical_classificationExcited statesBuilding blockesPolymerInterface statesEmission quenching021001 nanoscience & nanotechnology0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsPolymer/Colloidal Nanoplatelet HybridsGeneral EnergyChemical engineeringchemistryExcited stateAnchorsExcitons0210 nano-technologyDissociationConductive polymerPhotoluminescence quenchingExciton dissociation
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A new simple chromo-fluorogenic probe for NO2 detection in air.

2015

[EN] A new chromo-fluorogenic probe, consisting of a biphenyl derivative containing both a silylbenzyl ether and a N,N-dimethylamino group, for NO2 detection in the gas phase has been developed. A clear colour change from colourless to yellow together with an emission quenching was observed when the probe reacted with NO2. A limit of detection to the naked eye of about 0.1 ppm was determined and the system was successfully applied to the detection of NO2 in realistic atmospheric conditions.

inorganic chemicalsGas phase reactionsAnalytical chemistryEtherPhotochemistryNO2Nitric Oxidecomplex mixturesCatalysisGas phasechemistry.chemical_compoundQUIMICA ORGANICAChromogenic detectionFluorescent DyesDetection limitBiphenylEmission quenchingSIMPLE (dark matter experiment)Molecular StructureSensorsAirOrganic ChemistryQUIMICA INORGANICAGeneral Chemistryrespiratory systemchemistryChromogenic CompoundsNaked eyeDerivative (chemistry)Chemistry (Weinheim an der Bergstrasse, Germany)
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