Dynamic interaction of TCNQ- with β-cyclodextrin

A two-dimensional NMR exchange study

Cynthia J Hartzell, Scot R. Mente, Nathan L. Eastman, Jackie L. Beckett

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Complexation of reduced tetracyanoquinodimethane (TCNQ-) with β-cyclodextrin results in the formation of a σ-bonded dimer, (βCD-TCNQ)22- (J. L. Beckett et al, 1992). 1H and 13C NMR show peaks for β-cyclodextrin both free and in (βCD-TCNQ)22-. By use of 2D 1H exchange spectroscopy, it is shown that β-cyclodextrin is undergoing slow exchange at rates from 0.9 s-1 at 30°C to 5.6 s-1 at 42°C. The temperature dependence of the rate constant yields an activation energy of 128 kJ/mol.

Original languageEnglish (US)
Pages (from-to)4887-4890
Number of pages4
JournalJournal of Physical Chemistry
Volume97
Issue number19
StatePublished - 1993

Fingerprint

Cyclodextrins
Ion exchange
Nuclear magnetic resonance
nuclear magnetic resonance
dimers
interactions
activation energy
Complexation
Dimers
temperature dependence
Rate constants
Activation energy
Spectroscopy
spectroscopy
tetracyanoquinodimethane
Temperature

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Dynamic interaction of TCNQ- with β-cyclodextrin : A two-dimensional NMR exchange study. / Hartzell, Cynthia J; Mente, Scot R.; Eastman, Nathan L.; Beckett, Jackie L.

In: Journal of Physical Chemistry, Vol. 97, No. 19, 1993, p. 4887-4890.

Research output: Contribution to journalArticle

Hartzell, Cynthia J ; Mente, Scot R. ; Eastman, Nathan L. ; Beckett, Jackie L. / Dynamic interaction of TCNQ- with β-cyclodextrin : A two-dimensional NMR exchange study. In: Journal of Physical Chemistry. 1993 ; Vol. 97, No. 19. pp. 4887-4890.
@article{e3ff7d48bd464229a1a3dc48f96a20b3,
title = "Dynamic interaction of TCNQ- with β-cyclodextrin: A two-dimensional NMR exchange study",
abstract = "Complexation of reduced tetracyanoquinodimethane (TCNQ-) with β-cyclodextrin results in the formation of a σ-bonded dimer, (βCD-TCNQ)22- (J. L. Beckett et al, 1992). 1H and 13C NMR show peaks for β-cyclodextrin both free and in (βCD-TCNQ)22-. By use of 2D 1H exchange spectroscopy, it is shown that β-cyclodextrin is undergoing slow exchange at rates from 0.9 s-1 at 30°C to 5.6 s-1 at 42°C. The temperature dependence of the rate constant yields an activation energy of 128 kJ/mol.",
author = "Hartzell, {Cynthia J} and Mente, {Scot R.} and Eastman, {Nathan L.} and Beckett, {Jackie L.}",
year = "1993",
language = "English (US)",
volume = "97",
pages = "4887--4890",
journal = "Journal of Physical Chemistry",
issn = "0022-3654",
publisher = "American Chemical Society",
number = "19",

}

TY - JOUR

T1 - Dynamic interaction of TCNQ- with β-cyclodextrin

T2 - A two-dimensional NMR exchange study

AU - Hartzell, Cynthia J

AU - Mente, Scot R.

AU - Eastman, Nathan L.

AU - Beckett, Jackie L.

PY - 1993

Y1 - 1993

N2 - Complexation of reduced tetracyanoquinodimethane (TCNQ-) with β-cyclodextrin results in the formation of a σ-bonded dimer, (βCD-TCNQ)22- (J. L. Beckett et al, 1992). 1H and 13C NMR show peaks for β-cyclodextrin both free and in (βCD-TCNQ)22-. By use of 2D 1H exchange spectroscopy, it is shown that β-cyclodextrin is undergoing slow exchange at rates from 0.9 s-1 at 30°C to 5.6 s-1 at 42°C. The temperature dependence of the rate constant yields an activation energy of 128 kJ/mol.

AB - Complexation of reduced tetracyanoquinodimethane (TCNQ-) with β-cyclodextrin results in the formation of a σ-bonded dimer, (βCD-TCNQ)22- (J. L. Beckett et al, 1992). 1H and 13C NMR show peaks for β-cyclodextrin both free and in (βCD-TCNQ)22-. By use of 2D 1H exchange spectroscopy, it is shown that β-cyclodextrin is undergoing slow exchange at rates from 0.9 s-1 at 30°C to 5.6 s-1 at 42°C. The temperature dependence of the rate constant yields an activation energy of 128 kJ/mol.

UR - http://www.scopus.com/inward/record.url?scp=0000629285&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000629285&partnerID=8YFLogxK

M3 - Article

VL - 97

SP - 4887

EP - 4890

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

SN - 0022-3654

IS - 19

ER -