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Impact of dendrimer density on epoxide enantioselectivity over an immobilised chiral salen complex

Paper ID Volume ID Publish Year Pages File Format Full-Text
50433 46794 2014 5 PDF Available
Title
Impact of dendrimer density on epoxide enantioselectivity over an immobilised chiral salen complex
Abstract

•Decreasing dendrimer surface density increases enantioselectivity 5 fold•Anchoring of salen complexes to dendrimers up to generation 4•Increase in enantioselectivity as temperature is increased

PAMAM dendrimers were grown on two silica supports with different surface dendrimer densities and subsequently used to immobilise a chiral salen complex. The low density supported sample resulted in the complex exhibiting the ability to act enantioselectively while this effect was all but lost for sample based on the high density support. The negative effect of the high density material was attributed to undesired interactions between the complex and the support. An understanding of this effect allowed partial recovery of enantioselectivity for the high density support based catalysts through operating at higher temperatures.

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Keywords
Dendrimers; Immobilised salens; Epoxidation
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Impact of dendrimer density on epoxide enantioselectivity over an immobilised chiral salen complex
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 43, 5 January 2014, Pages 159–163
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
Online Support
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