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Comparison of Binding Affinities of Water-Soluble Calixarenes with the Organophosphorus Nerve Agent Soman (GD) and Commonly-Used Nerve Agent Simulants

The formation of inclusion complexes of the water-soluble -sulfonatocalix[ ]arenes, where = 4 or 6, with the Chemical Warfare Agent (CWA) GD, or Soman, and commonly used dialkyl methylphosphonate simulants has been studied by experimental solution NMR methods and by Molecular Mechanics (MMFF) and se...

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Published in:Molecules (Basel, Switzerland) Switzerland), 2018-01, Vol.23 (1), p.207
Main Authors: Ede, Jayne A, Cragg, Peter J, Sambrook, Mark R
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cited_by cdi_FETCH-LOGICAL-c493t-ec4a7e0c259cc69361309196afcf4201afb76d9b2a2d18008b5c7869ffc5abae3
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description The formation of inclusion complexes of the water-soluble -sulfonatocalix[ ]arenes, where = 4 or 6, with the Chemical Warfare Agent (CWA) GD, or Soman, and commonly used dialkyl methylphosphonate simulants has been studied by experimental solution NMR methods and by Molecular Mechanics (MMFF) and semi-empirical (PM6) calculations. Complex formation in non-buffered and buffered solutions is driven by the hydrophobic effect, and complex stoichiometry determined as 1:1 for all host:guest pairs. Low affinity complexes ( < 100 M ) are observed for all guests, attributed to poor host-guest complementarity and the role of buffer cation species accounts for the low affinity of the complexes. Comparison of CWA and simulant behavior adds to understanding of CWA-simulant correlations and the challenges of simulant selection.
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subjects Affinity
Aromatic compounds
Biological & chemical weapons
Calixarenes
Chemical warfare
chemical warfare agent
Complementarity
Complex formation
complexation
computational
hydrophobic effect
Hydrophobicity
inclusion complex
Inclusion complexes
nerve agent
Stoichiometry
supramolecular
Water chemistry
title Comparison of Binding Affinities of Water-Soluble Calixarenes with the Organophosphorus Nerve Agent Soman (GD) and Commonly-Used Nerve Agent Simulants
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