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Title: Thermal decomposition of phosphonium salicylate and phosphonium benzoate ionic liquids
Award ID(s):
2010584 2010205
NSF-PAR ID:
10328868
Author(s) / Creator(s):
; ; ; ; ;
Date Published:
Journal Name:
Journal of Molecular Liquids
Volume:
352
Issue:
C
ISSN:
0167-7322
Page Range / eLocation ID:
118700
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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  1. Herein, we examine two sensing schemes for detection and discrimination of chlorinated volatile organic compounds (VOCs). In this work, phosphonium ionic liquids (ILs) were synthesized and vapor sensing properties examined and compared to phosphonium IL-polymer composites. Pure IL sensors were used to develop a QCM-based multisensory array (MSA), while IL-polymer composites were used to develop an MSA and virtual sensor arrays (VSAs). It was found that by employing the composite MSA, five chlorinated VOCs were accurately discriminated at 95.56%, which was an increase in accuracy as compared to pure ILs MSA (84.45%). Data acquired with two out of three VSAs allowed discrimination of chlorinated VOCs with 100% accuracy. These studies have provided greater insight into the benefits of incorporating polymers in coating materials for enhanced discrimination accuracies of QCM-based sensor arrays. To the best of our knowledge, this is the first report of a QCM-based VSA for discrimination of closely related chlorinated VOCs. 
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