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From zeozymes to bio-inspired heterogeneous solids: Evolution of design strategies for sustainable catalysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
55183 47043 2012 16 PDF Available
Title
From zeozymes to bio-inspired heterogeneous solids: Evolution of design strategies for sustainable catalysis
Abstract

Bio-derived transition-metal complexes containing well-defined and well-characterized active sites can be anchored, in a site-isolated fashion, on to the inner walls of porous inorganic supports, for generating highly active and selective single-site heterogeneous catalysts, which can serve as effective functional mimics of metalloenzymes. The nature of an active site in an enzyme and its ability to harness a particular catalytic function with remarkable selectivity, via its protein tertiary structure, could be judiciously transposed to zeolitic architectures with specifically engineered active sites. Throughout this article we follow the progress and evolution of engineering enzymatic activity and selectivity in synthetically designed catalysts, emphasizing the importance and the advantages of the different synthesis methodologies in immobilizing bio-inspired catalytically active single-sites on varying solid supports. The benefits of such systems are highlighted in terms of their environmental impact by reduction of waste, mitigating the generation of greenhouse gases, boosting the enantioselectivity in heterogeneously catalyzed reactions and in the utilization of ‘greener’ oxidants; with conclusions drawn on how specific supports affect catalytic properties via modification of the local environment of the active site. The seminal contributions of Dr. Ratnasamy in this field have paved the way for a more fundamental understanding of how the support environment, and its interactions with the active site at a molecular level, can lead to development of structure–activity relationships, which in the future can provide avenues for specifically tailoring catalytic outcomes from a mechanistic standpoint.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (374 K)Download as PowerPoint slideHighlights► Judiciously engineered bio-inspired solids are effective functional mimics of enzymes. ► Design strategies can influence support characteristics for tailored selectivity. ► Support architecture critical in modulating active-site geometry. ► Heterogenized, metal-free organocatalysts attractive for industrial organic synthesis. ► Structure–property relationships at molecular level facilitate mechanistic insights.

Keywords
Enzyme mimics; Bio-inspired catalysts; Single-site heterogeneous catalysts; Amino acids; Zeozymes; Organocatalysis
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From zeozymes to bio-inspired heterogeneous solids: Evolution of design strategies for sustainable catalysis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 198, Issue 1, 30 December 2012, Pages 19–34
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
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us