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Title: Molecular engineering of porous silica using aryl templates

Abstract

A process is described 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 sieves, desiccants, and catalyst supports are produced. 3 figs.

Inventors:
;
Issue Date:
OSTI Identifier:
7288844
Patent Number(s):
5321102 A
Application Number:
PPN: US 7-967081
Assignee:
Dept. of Energy, Washington, DC (United States) SNL; EDB-94-102086
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Patent File Date: 26 Oct 1992
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; POROUS MATERIALS; FABRICATION; SILICA; POROSITY; IMPREGNATION; ORGANIC SILICON COMPOUNDS; PORE STRUCTURE; REMOVAL; USES; CHALCOGENIDES; MATERIALS; MICROSTRUCTURE; MINERALS; ORGANIC COMPOUNDS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; SILICON COMPOUNDS; SILICON OXIDES; 360601* - Other Materials- Preparation & Manufacture; 360606 - Other Materials- Physical Properties- (1992-)

Citation Formats

Loy, D.A., and Shea, K.J. Molecular engineering of porous silica using aryl templates. United States: N. p., 1994. Web.
Loy, D.A., & Shea, K.J. Molecular engineering of porous silica using aryl templates. United States.
Loy, D.A., and Shea, K.J. Tue . "Molecular engineering of porous silica using aryl templates". United States.
@article{osti_7288844,
title = {Molecular engineering of porous silica using aryl templates},
author = {Loy, D.A. and Shea, K.J.},
abstractNote = {A process is described 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 sieves, desiccants, and catalyst supports are produced. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {6}
}