0000000000300118

AUTHOR

Chantal Andraud

showing 2 related works from this author

Synthesis, Electrochemistry, and Photophysics of Aza-BODIPY Porphyrin Dyes

2016

International audience; The synthesis of dyad and triad aza-BODIPY-porphyrin systems in two steps starting from an aryl-substituted aza-BODIPY chromophore is described. The properties of the resulting aza-BODIPY-porphyrin conjugates have been extensively investigated by means of electrochemistry, spectroelectrochemistry, and absorption/emission spectroscopy. Fluorescence measurements have revealed a dramatic loss of luminescence intensity, mainly due to competitive energy transfer and photoinduced electron transfer involving charge separation followed by recombination.

resonance energy-transferporphyrinoidstetraarylazadipyrromethenes010402 general chemistryPhotochemistryElectrochemistry01 natural sciences7. Clean energy[ CHIM ] Chemical SciencesCatalysisFluorescence spectroscopyPhotoinduced electron transfersinglet oxygentransfersphotoinduced electron-transferphotoinduced electron transferchemistry.chemical_compoundgeneration[CHIM]Chemical Scienceselectrogenerated chemiluminescencespectroscopic propertiespolyadsAbsorption (electromagnetic radiation)aza-BODIPYs010405 organic chemistryfullereneOrganic ChemistryGeneral ChemistryChromophorefluorescence spectroscopyPorphyrinFluorescence0104 chemical sciences3. Good healthchemistryelectrochemistryderivativesLuminescence
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On the origin of controlled anisotropic growth of monodisperse gold nanobipyramids

2021

We elucidate the crucial role of the cetyl trimethylammonium bromide (CTAB) surfactant in the anisotropic growth mechanism of gold nano-bipyramids, nano-objects with remarkable optical properties and high tunability. Atomistic molecular dynamics simulations predict different surface coverages of the CTAB (positively charged) heads and their (bromide) counterions as function of the gold exposed surfaces. High concentration of CTAB surfactant promotes formation of gold nanograins in solution that work as precursors for the smooth anisotropic growth of more elongated nano-bipyramidal objects. Nanobipyramids feature higher index facets with respect to nanorods, allowing higher CTAB coverages th…

Molecular dynamicMaterials scienceAbsorption spectroscopyScanning electron microscopeDispersity02 engineering and technologySurface active agents010402 general chemistry01 natural sciencesMolecular dynamicschemistry.chemical_compoundAbsorption spectroscopyPulmonary surfactantBromideGeneral Materials Sciencechemistry.chemical_classificationtechnology industry and agriculture021001 nanoscience & nanotechnologyOptical propertie0104 chemical scienceschemistryChemical engineeringAnisotropyNanorodGoldCounterion0210 nano-technologyScanning electron microscopyMicelleNanoscale
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