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

doi:10.1021/j100121a004

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

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

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Abstract

Complexation of reduced tetracyanoquinodimethane (TCNQ-) with β-cyclodextrin results in the formation of a σ-bonded dimer, (βCD-TCNQ)₂^2- (J. L. Beckett et al, 1992). ¹H and ¹³C NMR show peaks for β-cyclodextrin both free and in (βCD-TCNQ)₂^2-. 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 language	English (US)
Pages (from-to)	4887-4890
Number of pages	4
Journal	Journal of physical chemistry
Volume	97
Issue number	19
DOIs	https://doi.org/10.1021/j100121a004
State	Published - 1993

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General Engineering
Physical and Theoretical Chemistry

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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",

doi = "10.1021/j100121a004",

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journal = "Journal of physical chemistry",

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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.

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Dynamic interaction of TCNQ- with β-cyclodextrin: A two-dimensional NMR exchange study

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