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Title: Molecular engineering of porous silica using aryl templates

Abstract

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.

Inventors:
 [1];  [2]
  1. (Albuquerque, NM)
  2. (Irvine, CA)
Issue Date:
Research Org.:
AT & T CORP
OSTI Identifier:
869355
Patent Number(s):
5321102
Assignee:
United States of America as represented by Department of Energy (Washington, DC) SNL
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
molecular; engineering; porous; silica; aryl; templates; process; manipulating; porosity; series; organic; template; covalently; incorporated; silicate; matrix; bridged; polysilsesquioxanes; selectively; removed; material; oxidation; oxygen; plasma; means; leaving; engineered; voids; pores; size; dependent; length; spacer; measured; terms; si-si; distances; range; 67; nm; 08; changes; introduced; loss; result; narrow; micropores; alkyl; spacers; novel; microporous; materials; useful; seives; dessicants; catalyst; supports; produced; porous silica; catalyst support; selectively removed; materials useful; oxygen plasma; selectively remove; narrow range; catalyst supports; organic template; silicate matrix; /525/528/

Citation Formats

Loy, Douglas A., and Shea, Kenneth J. Molecular engineering of porous silica using aryl templates. United States: N. p., 1994. Web.
Loy, Douglas A., & Shea, Kenneth J. Molecular engineering of porous silica using aryl templates. United States.
Loy, Douglas A., and Shea, Kenneth J. Sat . "Molecular engineering of porous silica using aryl templates". United States. https://www.osti.gov/servlets/purl/869355.
@article{osti_869355,
title = {Molecular engineering of porous silica using aryl templates},
author = {Loy, Douglas A. and Shea, Kenneth J.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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