Title page for ETD etd-11132006-131244

Type of Document Master's Thesis
Author Kittle, Joshua D.
URN etd-11132006-131244
Title Quartz Crystal Microbalance Studies of Dimethyl Methylphosphonate Sorption Into Trisilanolphenyl-Poss Films
Degree Master of Science
Department Chemistry
Advisory Committee
Advisor Name Title
Esker, Alan R. Committee Chair
Morris, John R. Committee Member
Troya, Diego Committee Member
  • chemical warfare agent simulant
  • quartz crystal microbalance
  • trisilanolphenyl-POSS
  • Langmuir-Blodgett film
Date of Defense 2006-11-06
Availability unrestricted
Developing methods to detect, adsorb, and decompose chemical warfare agents (CWAs) is of critical importance to protecting military and civilian populations alike. The sorption of dimethyl methylphosphonate (DMMP), a CWA simulant, into trisilanolphenyl-POSS (TPP) films has previously been characterized with reflection absorption infrared spectroscopy, x-ray photoelectron spectroscopy, and uptake coefficient determinations [1]. In our study, the quartz crystal microbalance (QCM) is used to study the sorption phenomena of DMMP into highly ordered Langmuir-Blodgett (LB) films of TPP. In a saturated environment, DMMP sorbs into the TPP films, binding to TPP in a 1:1 molar ratio. Although previous work indicated these DMMP-saturated films were stable for several weeks, DMMP is found to slowly desorb from the TPP films at room temperature and pressure. Upon application of vacuum to the DMMP-saturated films, DMMP follows first-order desorption kinetics and readily desorbs from the film, returning the TPP film to its original state.

[1] Ferguson-McPherson, M.; Low, E.; Esker, A.; Morris, J. J. Phys. Chem. B. 2005, 109, 18914.

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