Document Detail


Corner capping of silsesquioxane cages by chemical warfare agent simulants.
MedLine Citation:
PMID:  16285795     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The room-temperature uptake and reactivity of gas-phase methyl dichlorophosphate (MDCP) and trichlorophosphate (TCP) within trisilanolphenyl-polyhedral oligomeric silsesquioxane (POSS) Langmuir-Blodgett films are investigated. The halogenated phosphate molecules are found to readily diffuse into and react with the hybrid inorganic-organic silicon-oxide films under ambient conditions. Reflection absorption infrared spectroscopy (RAIRS), X-ray photoelectron spectroscopy (XPS), and fast atom bombardment-mass spectrometry (FAB-MS) measurements suggest that the chlorophosphates undergo hydrolysis with the silanol groups of the POSS LB-film. Substitution and elimination reactions appear to cap the corner of the POSS molecules, leaving a surface-bound phosphoryl group and a resulting structure that is highly stable at elevated temperatures.
Authors:
Melinda K Ferguson-McPherson; Emily R Low; Alan R Esker; John R Morris
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  21     ISSN:  0743-7463     ISO Abbreviation:  Langmuir     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2005-11-15     Completed Date:  2007-04-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  United States    
Other Details:
Languages:  eng     Pagination:  11226-31     Citation Subset:  -    
Affiliation:
Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.
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