Second-harmonic generation from non-dipolar non-centrosymmetric aromatic charge-transfer molecules
✍ Scribed by I. Ledoux; J. Zyss; J.S. Siegel; J. Brienne; J.-M. Lehn
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 494 KB
- Volume
- 172
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Second-harmonic generation from powders. of a series of three aromatic intramolecular charge-transfer moieties of Dlb symmetry is reported. One compound is shown to be active while its symmetric structure. precludes any molecular non-linear contribution of a vectorial nature such as usually prevails in polar paranitroaniline-liie systems. Similar nondipolar non-centrosymmetric molecular moieties could serve as building blocks in new types of optically non-liiear materials where the packing is not influenced by dipole-dipole interactions and the statistical occurrence of non-eontrosymmetry would consequently increase.