PHD dissertations from the Physical Chemistry Dept. since 2000



Some recent publications

Ref1: Structural and solvent modulation of symmetry-breaking charge-transfer pathways in molecular triads Ref2: Excited-State Symmetry Breaking and Localization in a Noncentrosymmetric Electron Donor-Acceptor-Donor Molecule Ref3: Excitation-Wavelength-Dependent Photophysics of a Torsionally Disordered Push-Pull Dye Ref4: Core-Alkynylated Fluorescent Flippers: Altered Ultrafast Photophysics to Track Thick Membranes Ref5: Axially-Chiral Boramidine for Detailed (Chir)optical Studies Ref6: Antenna Effect in Noble Metal-Free Dye-Sensitized Photocatalytic Systems Enhances CO2-to-CO Conversion Ref7: Controlling Symmetry-Breaking Charge Separation in Pyrene Bichromophores Ref8: Dye-Sensitized Photocatalysis: Hydrogen Evolution and Alcohol-to-Aldehyde Oxidation without Sacrifical Electron Donor Ref9: Excited-State Symmetry Breaking in Solvent Mixtures Ref10: Photoinduced Electron Transfer between Dipolar Reactants: Solvent and Excitation Wavelength Effects Ref11: Bimolecular Photoinduced Symmetry-Breaking Charge Separation of Perylene in Solution Ref12: Coupling to octahedral tilts in halide perovskite nanocrystals induces phonon-mediated attractive interactions between excitons Ref13: Excited-state symmetry breaking in quadrupolar pull-push-pull molecules: dicyanovinyl vs. cyanophenyl acceptors Ref14: Torsional Disorder, Symmetry Breaking, and the Crystal Violet Shoulder Controversy Ref15: Looking for chiral recognition in photoinduced bimolecular electron transfer using ultrafast spectroscopy    Cycle through references
Structural and solvent modulation of symmetry-breaking charge-transfer pathways in molecular triads
C. Govind, E. Balanikas, G. Sanil, D.T. Gryko and E. Vauthey
ref1692

Whereas the photoinduced charge-transfer properties of electron donor–acceptor dyads are now well understood, those of symmetric conjugated architectures containing several identical donor–acceptor branches have started to be scrutinised much more recently. Here, we report on our investigation of the charge-transfer dynamics of a series of formally centrosymmetric triads consisting of a quadrupolar dihydropyrrolopyrrole core substituted with two identical diphenylethynyl lateral branches. Using a combination of time-resolved electronic and vibrational spectroscopies, we show that these molecules exhibit rich excited-state dynamics, which includes three different types of symmetry-breaking charge-transfer processes depending on the nature of the end substituents on the core and branches as well as on the solvent: (i) excited-state symmetry breaking within the core; (ii) charge transfer from the core to one of the two branches; (iii) charge transfer between the two branches. This investigation illustrates how the excited-state properties of symmetric conjugated molecules, including the nature and location of the exciton, can be controlled by fine tuning structural as well as environmental parameters.

Chemical Science, 15 , 2024 , p17362 -17371

Selection of publications from the Physical Chemistry Dept. (1586)

By group :

Group Bürgi  Atom feed    Group Hauser  Atom feed    Group Vauthey  Atom feed    Group Hagemann  Atom feed Group Wesolowski  Atom feed Group Sugihara  Atom feed
 
Alumni : Group Gagliardi Group Geoffroy Group Gülaçar
  Group Weber Group Bill Group Lucken


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The old catalog of publications from the University of Geneva, and the publications from the physical Chemistry dept.

The new catalog of publications from the University of Geneva, and the publications from the physical Chemistry dept.
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 Last modified 05/10/2017    D. Lovy