کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
70184 | 48814 | 2011 | 7 صفحه PDF | دانلود رایگان |
Here we present a series of molecularly imprinted polymers capable of catalysing the Diels–Alder reaction between benzyl 1,3-butadienylcarbamate (1) and N,N-dimethyl acrylamide (2). The polymer systems studied here demonstrated an unusual cross-linker and temperature dependent behaviour, namely that polymer catalysis of the Diels–Alder reaction was lower at elevated temperature, in contrast to the solution reaction. Furthermore, not only was the catalytic activity significantly influenced by the choice of cross-linker, but in a similar fashion also the extent of the temperature effect, indicating a close relationship between catalysis and the observed inhibition. Molecular dynamics simulations of both the polymer systems studied were used to provide insight into the molecular background of transition state stabilisation, and differences in properties of the systems based on different cross-linkers.
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► Recently described effect of high temperature on a MIP observed for another system.
► Different cross-linker allows for more detailed study of effect.
► MD studies give background to differences between polymer systems.
Journal: Journal of Molecular Catalysis B: Enzymatic - Volume 72, Issues 3–4, November 2011, Pages 199–205