Hydrogen bonding in a host-guest system

C-undecylcalix[4]resorcinarene and water in benzene

Clyde F. Wilson, Michael P. Eastman, Cynthia J Hartzell

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The behavior of water in a benzene solution of C-undecylcalix[4]resorcinarene (UR) is studied by 1H 2D NMR exchange spectroscopy and by 1D NMR. The rate constants for exchange of the UR hydroxyl protons, Ha, with water over the temperature range 298-338 K are 0.7-4.6 s-1 and those for the exchange of UR hydroxyl protons, Hb, over the temperature range 298-328 K are 1.8-8.1 s-1. Activation energies calculated for these exchange processes are 9.0 ± 0.5 kcal/mol and 10.2 ± 1.0 kcal/mol, respectively. The chemical shift of dissolved water is largely dependent upon the concentration of UR. An upper limit for the critical aggregation concentration of UR is 10-5 M as shown by 1H NMR.

Original languageEnglish (US)
Pages (from-to)9309-9313
Number of pages5
JournalJournal of Physical Chemistry B
Volume101
Issue number45
StatePublished - Nov 6 1997

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Benzene
Hydrogen bonds
benzene
Nuclear magnetic resonance
Hydroxyl Radical
nuclear magnetic resonance
Protons
Water
Ion exchange
hydrogen
water
protons
Chemical shift
chemical equilibrium
Rate constants
Agglomeration
Activation energy
Spectroscopy
activation energy
Temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Engineering(all)

Cite this

Hydrogen bonding in a host-guest system : C-undecylcalix[4]resorcinarene and water in benzene. / Wilson, Clyde F.; Eastman, Michael P.; Hartzell, Cynthia J.

In: Journal of Physical Chemistry B, Vol. 101, No. 45, 06.11.1997, p. 9309-9313.

Research output: Contribution to journalArticle

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