Versatile Synthesis of Small NLO-Active Molecules Forming Amorphous Materials with Spontaneous Second-Order NLO Response
2003; American Chemical Society; Volume: 125; Issue: 51 Linguagem: Inglês
10.1021/ja038207q
ISSN1943-2984
AutoresÉléna Ishow, Cyril Bellaïche, Laurent Bouteiller, Keitaro Nakatani, Jacques A. Delaire,
Tópico(s)Liquid Crystal Research Advancements
ResumoA novel synthetic approach to a series of bulky triarylamines substituted by various electron-withdrawing groups and forming amorphous materials is presented. Under vacuum evaporation, thin films with high optical quality are obtained and exhibit spontaneous second-order nonlinear optical activity. This unprecedented result is likely due to subtle balance between strong dipole−dipole interactions and steric crowding causing self-assembly and noncentrosymmetric local ordering, stable up to one year.
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