Nonlinear Dependence on Na+Ions for the Binding Dynamics of Cucurbit[6]uril with the trans-1-Methyl-4-(4-hydroxystyryl)pyridinium Cation

Hao Tang, Suma S. Thomas, Luise Wolf, Palani Natarajan, Young Ho Ko, James Wilson, Kimoon Kim, Cornelia Bohne

Research output: Contribution to journalArticlepeer-review

Abstract

The binding dynamics of the trans-1-methyl-4-(4-hydroxystyryl)pyridinium cation (HSP+) to cucurbit[6]uril (CB[6]) in the presence of Na+ cations were studied to establish the effect of the relative concentrations of the system's components (HSP+, CB[6], and Na+) on these dynamics. The formation of the HSP+@CB[6] complex was temporally uncoupled from the photoisomerization of trans-HSP+, while a nonlinear effect of the Na+ cation concentration on the HSP+@CB[6] dynamics was observed. This nonlinearity is a consequence of Na+ having the opposite effect on the association and dissociation rate constants for the HSP+@CB[6] complex, creating a conceptual framework for using such nonlinearities to control multistep reactions in cucurbit[n]uril chemistry.

Original languageEnglish (US)
Pages (from-to)10219-10225
Number of pages7
JournalJournal of Physical Chemistry B
Volume124
Issue number45
DOIs
StatePublished - Nov 12 2020

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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