Molecular engineering of porous silica using aryl templates

Patent · Fri Dec 31 23:00:00 EST 1993

OSTI ID:869355

Loy, Douglas A ^[1]; Shea, Kenneth J ^[2]

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1. Albuquerque, NM
2. Irvine, CA

A process for manipulating the porosity of silica using a series of organic template groups covalently incorporated into the silicate matrix. The templates in the bridged polysilsesquioxanes are selectively removed from the material by oxidation with oxygen plasma or other means, leaving engineered voids or pores. The size of these pores is dependent upon the length or size of the template or spacer. The size of the templates is measured in terms of Si-Si distances which range from about 0.67 nm to 1.08 nm. Changes introduced by the loss of the templates result in a narrow range of micropores (i.e. <2 nm). Both aryl and alkyl template groups are used as spacers. Novel microporous silica materials useful as molecular seives, dessicants, and catalyst supports are produced.

• Research Organization: AT & T CORP
• DOE Contract Number: AC04-76DP00789
• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 5321102
• OSTI ID: 869355
• Country of Publication: United States
• Language: English

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