Chiral chromophores for second harmonic microscopy

Marie-Claire Schanne-Klein; Thierry Boulesteix; Emmanuel Beaurepaire; Martin-Pierre Sauviat

doi:10.1117/12.499754

9 October 2003 Chiral chromophores for second harmonic microscopy

Marie-Claire Schanne-Klein, Thierry Boulesteix, Emmanuel Beaurepaire, Martin-Pierre Sauviat

Proceedings Volume 5139, Confocal, Multiphoton, and Nonlinear Microscopic Imaging; (2003) https://doi.org/10.1117/12.499754
Event: European Conferences on Biomedical Optics 2003, 2003, Munich, Germany

Abstract

The use of chiral harmonophores in second harmonic generation (SHG) microscopy of lipid bilayers should enable one to obtain a signal even when the distribution of the chromophores is centrosymmetric. In order to determine optimal chiral molecules, we performed polarization-resolved second harmonic reflection experiments. We found that chirality must arise from an excitonic coupling rather than from an asymmetric center. We selectively labeled giant unilamellar lipid vesicles and cell membranes with such a molecule, namely an acridine substituted Troger's base, as demonstrated by two-photon-excited fluorescence microscopy. We performed preliminary SHG microscopy experiments, but the poor efficiency of the current form of our molecule does not allow us to demonstrate chirality effects.

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Marie-Claire Schanne-Klein, Thierry Boulesteix, Emmanuel Beaurepaire, and Martin-Pierre Sauviat "Chiral chromophores for second harmonic microscopy", Proc. SPIE 5139, Confocal, Multiphoton, and Nonlinear Microscopic Imaging, (9 October 2003); https://doi.org/10.1117/12.499754

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KEYWORDS

Second-harmonic generation

Molecules

Microscopy

Optical activity

Chromophores

Polarization

Magnetism

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