A new series of nonlinear optical materials with molecular receptor: design and synthesis

Summary form only given. Molecular recognition-dirceted self-assembly of complementary molecular components, e.g., barbituric acid unit and melarnine (or triaminopynmidme) unit, may spontaneously form ordered, solid state supramolecular structures. If the melamine, unit is regarded as the assembler component, vixing it with a light active barbituric acid derivative could automatically lead to an ordered asymmetric array, thus offering an opportunity to design organic mesophase, layers, and crystals serving as second harmonic generation NLO materials. In this work, we synthesized three dyes containing ferrocene, aniline, and phenol as electron donors, respectively, connected with barbituric acid group by a/spl pi/ bridge. They were characterized by IR, NMR and micro analysis, and hoped to form utilizable NLO materials for SHG when mixing with the assembler (melamine derivative). The barbituric acid lanit is proved to be either a good electron acceptor or a hydrophilic group. By organizing them with Langmuir-Blodgett technique, their molecular hyperpolarizabilitis were recorded as high as 10-/sup 28/~ 10- 30 esu.