期刊
CHEMISTRYSELECT
卷 3, 期 16, 页码 4430-4438出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201800344
关键词
Halloysite; Heck reaction; nanocatalyst; palladium; p-phenylenevinylene oligomers
资金
- Direccion Nacional de Investigaciones-Universidad Nacional de Colombia
The potential applications of poly(p-phenylene vinylene) derivatives and its oligomers in organic electronics have attracted great interest in recent years. In this study, a novel palladium supported on halloysite heterogeneous catalyst (Pd/HNTs) was prepared, characterized and its catalytic activity for obtaining p-phenylenevinylene oligomers was investigated in the Heck coupling of styrene and 2,5-diiodo-1,4-dimethoxybenzene using conventional and environmentally benign solvents. Thus, in the presence of 0.75 mol% catalyst, the product was obtained in 76% yield using ethanol as solvent. To evaluate the versatility of the Pd/HNTs catalyst, the synthesis of a series of p-phenylenevinylene oligomers and divinylbenzene derivatives was performed obtaining yields between 58 and 93%. In addition, the catalyst could be recovered and reused for four reaction cycles without significant loss of its catalytic activity. Finally, the photophysical characterization of the synthesized molecules was performed.
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