Organizing for better synthesis

Article Abstract:

New research shows how a microporous inorganic oxide can be used to produce microtubules or stacks of lamellar crystals. Rather than sieving out these organisms, the hope is that they may now be tailor made and the designing of new materiels based on them is closer to becoming a reality. The use of self-assembled micro-structures as structure-directing agents is not limited to inorganic materiels such as the lipid-iron oxide composites mentioned in the new research. Self-assembly on this scale could lead to the synthesis of novel catalysts and electronic materials.

Innovations, Biosynthesis, Microtubules

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Organic-functionalized molecular sieves as shape-selective catalysts

Article Abstract:

It has been possible to develop a new methodology for producing microporous sieves containing organic functionalities within their pores. The organic-functionalized materials produced in this research present new opportunities for shape-selective catalysis. In principle, an intrazeolitic organic moiety can be 'tailor-made' from any functional group that catalyzes homogeneous reactions. It was possible to demonstrate both acid catalysis and base-catalyzed conversions.

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Molecular imprinting of bulk, microporous silica

Article Abstract:

Bulk amorphous silicas were imprinted with single aromatic rings having up to three 3-aminopropyltriethoxysilane side groups. This is incorporated into the silica framework and removal of the aromatic core leads to a cavity with spatially organized aminopropyl groups anchored to pore walls. Imprinted silica acts as shape-selective base catalysts.

Heterogeneous catalysis, Silica

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