Study of ionic liquid immobilization on polyvinyl ferrocene substrates for gas sensor arrays

Details

• Personal Author:
  Hou K-Y ; Rehman A ; Zeng X
• Description:
  In this report, the effects of conductive polymer oxidation states and structures on the design and development of ionic liquid (IL)/conductive polymer (CP) composite films for gas sensing are systematically characterized. Four different polyvinyl ferrocene (PVF) films synthesized by varying the conditioning potential (0.7 vs 0.0 V) and the electrolyte are tested for their gas-sensing properties (e.g., sensitivity, selectivity, response time, linearity, and dynamic range against various gas analytes such as dichloromethane, ethanol, natural gas, methane, formaldehyde (37%), and benzene) utilizing the quartz crystal microbalance (QCM) and ATR-FT-IR. The best available film is further studied as a substrate for the immobilization of various ILs that enhanced both the sensitivity and selectivity. Finally, two arrays, each comprising four sensors with the following scheme are developed and characterized for their ability to classify the four target analytes by using linear discriminant analysis: (1) the highest sensitivity PVF film immobilized with four different ILs and (2) the highest sensitivity IL immobilized in four different PVF films. Array 2 is proven to be much better than array 1 in discriminating the analytes, which is very significant in establishing the fact that a diverse set of PVF redox states allow the rational development of a PVF/IL composite-based sensor array in order to analyze complex mixtures utilizing structural differences and the extent of intermolecular interactions. [Description provided by NIOSH]
• Subjects:
  Biological Factors Chemistry Chemistry, Analytic Metals Occupational Health Safety
• Keywords:
  Analytical-chemistry Analytical-instruments Biological-factors Biological-systems Gas-detectors Gases Metallic-compounds Molecular-biology Oxygen-transport Quantitative-analysis
• ISSN:
  0743-7463
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Michigan ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  27
• Issue:
  8
• NIOSHTIC Number:
  nn:20039547
• Citation:
  Langmuir 2011 Apr; 27(8):5136-5146
• Contact Point Address:
  Xiangqun Zeng, The Department of Chemistry, Oakland University, Rochester, MI 48309
• Email:
  zeng@oakland.edu
• CAS Registry Number:
  Benzene (CAS RN 71-43-2) ; Dichloromethane (CAS RN 75-09-2) ; Ethanethiol (CAS RN 75-08-1) ; Formaldehyde (CAS RN 50-00-0) ; Methane (CAS RN 74-82-8)
• Federal Fiscal Year:
  2011
• NORA Priority Area:
  Mining
• Performing Organization:
  Oakland University, Rochester, Michigan
• Peer Reviewed:
  True
• Start Date:
  20090801
• Source Full Name:
  Langmuir
• End Date:
  20120731
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:07d5ba4a5c6b7d5ba8c17167785fad5b966fd4a4da8c60a668ae8f9019cbf6dc2e9a459a31662beb546f843c4d6773efe8dac1c8a068351d5b066b817b8d9c4f
• Download URL:
  https://stacks.cdc.gov/view/cdc/192742/cdc_192742_DS1.pdf
• File Type:
  [PDF - 777.17 KB ]