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Journal of Computer-Aided Molecular Design

, Volume 31, Issue 1, pp 21–28 | Cite as

Binding of carboxylate and trimethylammonium salts to octa-acid and TEMOA deep-cavity cavitands

  • Matthew R. Sullivan
  • Punidha Sokkalingam
  • Thong Nguyen
  • James P. Donahue
  • Bruce C. GibbEmail author
Article

Abstract

In participation of the fifth statistical assessment of modeling of proteins and ligands (SAMPL5), the strength of association of six guests (38) to two hosts (1 and 2) were measured by 1H NMR and ITC. Each host possessed a unique and well-defined binding pocket, whilst the wide array of amphiphilic guests possessed binding moieties that included: a terminal alkyne, nitro-arene, alkyl halide and cyano-arene groups. Solubilizing head groups for the guests included both positively charged trimethylammonium and negatively charged carboxylate functionality. Measured association constants (K a ) covered five orders of magnitude, ranging from 56 M−1 for guest 6 binding with host 2 up to 7.43 × 106 M−1 for guest 6 binding to host 1.

Keywords

Host-guest chemistry Cavitand Hydrophobic effect 

Notes

Acknowledgments

The authors gratefully acknowledge the support of the National Institutes of Health (GM 098141). The authors also acknowledge the Louisiana Board of Regents enhancement grant (Grant LEQSF-(2002-03)-ENH-TR-67) used to purchase the X-ray diffractometer.

Supplementary material

10822_2016_9925_MOESM1_ESM.pdf (4.1 mb)
Supplementary material 1 (PDF 4150 kb)

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Department of ChemistryTulane UniversityNew OrleansUSA

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