Citation:
ZHANG Lei, CUI Yuan-Chen. Synthesis of Starch Supported Palladium Catalyst and Its Catalytic Properties for Heck Reaction[J]. Chinese Journal of Applied Chemistry,
;2005, 22(4): 440-444.
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A starch supported palladium catalyst was synthesized and characterized by means of XPS,TG,DTA,TEM etc.The thermal analysis result showed that the catalyst was stable at up to 220℃.TEM confirmed that the Pd particles were spherical and uniformly distributed,and the average size was 10 nm.The starch supported palladium was an efficient catalyst for Heck arylation of acrylic acid and styrene with iodoarenes.In the presence of a small amount of the catalyst,the substituted trans-cinnamic acid or trans-stilbene was obtained in air.In the presence of the starch supported palladium,Heck arylation of acrylic acid with iodobenzene can be carried out efficiently at a low temperature (80℃) and the yield was 81%,indicating the high catalytic activity of the starch supported palladium (0).The Pd content decreased to 3.5%,2.6% and 2.0% respectively when the catalyst was repeatedly used three times.This was perhaps the reason why the catalytic activity of the catalyst decreased when used repeatedly.
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Keywords:
- starch,
- palladium,
- supported catalyst,
- Heck reaction
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