Synthesis and characterization of reactive liquid crystalline Schiff bases, Rh(I) complexes, and their derived polymers

Autor: Luis Oriol, S. Poelsma, Milagros Piñol, Ana I. Viñuales, José Luis Serrano
Rok vydání: 2000
Předmět:
Zdroj: Journal of Polymer Science Part A: Polymer Chemistry. 38:4466-4477
ISSN: 1099-0518
0887-624X
DOI: 10.1002/1099-0518(20001215)38:24<4466::aid-pola160>3.0.co;2-g
Popis: Two series of salicylaldimines have been synthesized that consist of model compounds with terminal methylenic chains and reactive compounds in which the terminal chains have been modified with acrylate groups. The dicarbonylrhodium(I) complexes of these systems were prepared by reacting the ligands with the dimer [RhCl(cod)]2 and CO. Characterization of the metal-containing acrylates by 1H NMR spectroscopy revealed that the Rh(I) can coordinate to the terminal double bond to produce pentacoordinated complexes. Furthermore, investigation of the mesogenic properties of the complexes revealed that the bulkiness of the metallic center requires the presence of at least a three-ring aromatic core to avoid the suppression of liquid crystallinity. The study was extended to include the side-chain polymers obtained from the acrylate-functionalized Schiff bases. Chelation of the preformed polyacrylate with low percentages of Rh(I) emerged as the best strategy to prepare Rh(I)-containing polyacrylates. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 4466–4477, 2000
Databáze: OpenAIRE
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