¹⁹F NMR fingerprints: identification of neutral organic compounds in a molecular container

J Am Chem Soc. 2014 Jul 30;136(30):10683-90. doi: 10.1021/ja504110f. Epub 2014 Jul 22.

Abstract

Improved methods for quickly identifying neutral organic compounds and differentiation of analytes with similar chemical structures are widely needed. We report a new approach to effectively "fingerprint" neutral organic molecules by using (19)F NMR and molecular containers. The encapsulation of analytes induces characteristic up- or downfield shifts of (19)F resonances that can be used as multidimensional parameters to fingerprint each analyte. The strategy can be achieved either with an array of fluorinated receptors or by incorporating multiple nonequivalent fluorine atoms in a single receptor. Spatial proximity of the analyte to the (19)F is important to induce the most pronounced NMR shifts and is crucial in the differentiation of analytes with similar structures. This new scheme allows for the precise and simultaneous identification of multiple analytes in a complex mixture.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Calixarenes / chemistry*
  • Coordination Complexes / chemistry
  • Fluorine / chemistry*
  • Magnetic Resonance Spectroscopy / methods*
  • Models, Molecular
  • Organic Chemicals / analysis*
  • Phenols / chemistry*
  • Tungsten / chemistry*

Substances

  • Coordination Complexes
  • Organic Chemicals
  • Phenols
  • calix(4)arene
  • Calixarenes
  • Fluorine
  • Tungsten