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Nicolas P, Abdallah S, Dok A, de Coene Y, Jeannin O, Bellec N, Malval JP, Verbiest T, Clays K, Van Cleuvenbergen S, Bilgin-Eran B, Akdas-Kiliç H, Camerel F. Non-Linear Optical Activity of Chiral Bipyrimidine-Based Thin Films. Chem Asian J 2024; 19:e202400112. [PMID: 38353579 DOI: 10.1002/asia.202400112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/13/2024] [Indexed: 03/01/2024]
Abstract
An original series of bipyrimidine-based chromophores featuring alkoxystyryl donor groups bearing short chiral (S)-2-methylbutyl chains in positions 4, 3,4 and 3,5, connected to electron-accepting 2,2-bipyrimidine rings, has been developed. Their linear and non-linear optical properties were studied using a variety of techniques, including one- and two-photon absorption spectroscopy, fluorescence measurements, as well as Hyper-Rayleigh scattering to determine the first hyperpolarizabilities. Their electronic and geometrical properties were rationalized by TD-DFT calculations. The thermal properties of the compounds were also investigated by a combination of polarized light optical microscopy, differential scanning calorimetry measurements and small-angle X-ray scattering experiments. The derivatives were found not to have mesomorphic properties, but to exhibit melting temperatures or cold crystallization behavior that enabled the isolation of well-organized thin films. The nonlinear optical properties of amorphous or crystalline thin films were studied by wide-field second harmonic generation and multiphoton fluorescence imaging, confirming that non-centrosymmetric crystal organization enables strong second and third harmonic generation. This new series confirms that our strategy of functionalizing 3D organic octupoles with short chiral chains to generate non-centrosymmetric organized thin films enables the development of highly second order nonlinear optical active materials without the use of corona-poling or tedious deposition techniques.
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Affiliation(s)
- Prescillia Nicolas
- Institut des Sciences Chimiques de Rennes, CNRS-UMR 6226, Université de Rennes, Rennes, France
| | - Stephania Abdallah
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, Mulhouse, France
| | - Ahmet Dok
- Department of Chemistry, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Yovan de Coene
- Department of Chemistry, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Olivier Jeannin
- Institut des Sciences Chimiques de Rennes, CNRS-UMR 6226, Université de Rennes, Rennes, France
| | - Nathalie Bellec
- Institut des Sciences Chimiques de Rennes, CNRS-UMR 6226, Université de Rennes, Rennes, France
| | - Jean-Pierre Malval
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute Alsace, Mulhouse, France
| | - Thierry Verbiest
- Department of Chemistry, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Koen Clays
- Department of Chemistry, Katholieke Universiteit Leuven, Leuven, Belgium
| | | | | | - Huriye Akdas-Kiliç
- Institut des Sciences Chimiques de Rennes, CNRS-UMR 6226, Université de Rennes, Rennes, France
- Department of Chemistry, Yildiz Technical University, Istanbul, Turkey
| | - Franck Camerel
- Institut des Sciences Chimiques de Rennes, CNRS-UMR 6226, Université de Rennes, Rennes, France
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