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Updated: Jun 26, 2026
Patterning via Optical Saturable Transitions - Fabrication and Characterization
Published on: December 11, 2014
Two-way molecular switches with large nonlinear optical contrast.
Fabien Mançois1, Jean-Luc Pozzo, Jianfeng Pan
1Institut des Sciences Moléculaires, UMR 5255 CNRS-Université de Bordeaux, Cours de la Libération, 351, 33405 Talence CEDEX, France.
Researchers developed efficient molecular switches for frequency doubling. These indolinooxazolidine-based switches show high nonlinear optical contrast, controllable by acid or light, with potential applications in optical devices.
Area of Science:
- Materials Science
- Organic Chemistry
- Nonlinear Optics
Background:
- Molecular switches are crucial for advanced optical applications.
- Indolinooxazolidine derivatives offer tunable properties for nonlinear optical (NLO) applications.
Purpose of the Study:
- To synthesize and characterize novel indolinooxazolidine derivatives as efficient acido- and photoswitchable frequency doublers.
- To optimize the nonlinear optical (NLO) contrast of these molecular switches.
- To investigate the switching mechanisms and structure-property relationships.
Main Methods:
- Synthesis of indolinooxazolidine derivatives with electron-withdrawing substituents.
- Characterization using UV-visible absorption and hyper-Rayleigh scattering.
- Quantum-chemical calculations (ab initio) for theoretical insights.
Main Results:
- Demonstrated efficient two-way photo- and pH-triggered switching.
- Achieved high second-order NLO contrast between closed and open forms.
- Correlated the first hyperpolarizability of protonated open forms (POFs) with Hammett parameters.
Conclusions:
- Indolinooxazolidine derivatives are highly efficient molecular switches for frequency doubling.
- Substitution with electron-withdrawing groups enhances NLO contrast.
- Theoretical and experimental data provide a comprehensive understanding of their switching behavior.
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