Use of 1H Nuclear Magnetic Resonance Longitudinal Relaxation Times in Structure Elucidation of Chlorinated Polyaromatic Compounds

David L. Ashley; Elizabeth R. Barnhart; Donald G. Patterson; Robert H. Hill

doi:10.1021/ac00152a005

Use of ¹H Nuclear Magnetic Resonance Longitudinal Relaxation Times in Structure Elucidation of Chlorinated Polyaromatic Compounds

David L. Ashley, Elizabeth R. Barnhart, Donald G. Patterson, Robert H. Hill

Forensic Science Program

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

2 Scopus citations

Abstract

We describe a procedure for measuring relative longitudinal relaxation times of protons In chlorinated polyaromatic hydrocarbons. The results Indicate that these times are dependent on Interproton distances and thus can be used to distinguish protons with ortho-proton neighbors from those without ortho-proton neighbors. In addition, the longitudinal relaxation time can also qualitatively describe inter-ring Interactions under certain conditions. The measurement Is used for structural elucidation of three cases of unknown chlorinated polyaromatic hydrocarbons, and In each case an unambiguous assignment Is possible. The use of relative proton longitudinal relaxation times for structural Identification should be broadly applicable to many structural problems.

Original language	English (US)
Pages (from-to)	15-19
Number of pages	5
Journal	Analytical Chemistry
Volume	60
Issue number	1
DOIs	https://doi.org/10.1021/ac00152a005
State	Published - Jan 1 1988

All Science Journal Classification (ASJC) codes

Analytical Chemistry

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10.1021/ac00152a005

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abstract = "We describe a procedure for measuring relative longitudinal relaxation times of protons In chlorinated polyaromatic hydrocarbons. The results Indicate that these times are dependent on Interproton distances and thus can be used to distinguish protons with ortho-proton neighbors from those without ortho-proton neighbors. In addition, the longitudinal relaxation time can also qualitatively describe inter-ring Interactions under certain conditions. The measurement Is used for structural elucidation of three cases of unknown chlorinated polyaromatic hydrocarbons, and In each case an unambiguous assignment Is possible. The use of relative proton longitudinal relaxation times for structural Identification should be broadly applicable to many structural problems.",

author = "Ashley, {David L.} and Barnhart, {Elizabeth R.} and Patterson, {Donald G.} and Hill, {Robert H.}",

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AU - Ashley, David L.

AU - Barnhart, Elizabeth R.

AU - Patterson, Donald G.

AU - Hill, Robert H.

PY - 1988/1/1

Y1 - 1988/1/1

N2 - We describe a procedure for measuring relative longitudinal relaxation times of protons In chlorinated polyaromatic hydrocarbons. The results Indicate that these times are dependent on Interproton distances and thus can be used to distinguish protons with ortho-proton neighbors from those without ortho-proton neighbors. In addition, the longitudinal relaxation time can also qualitatively describe inter-ring Interactions under certain conditions. The measurement Is used for structural elucidation of three cases of unknown chlorinated polyaromatic hydrocarbons, and In each case an unambiguous assignment Is possible. The use of relative proton longitudinal relaxation times for structural Identification should be broadly applicable to many structural problems.

AB - We describe a procedure for measuring relative longitudinal relaxation times of protons In chlorinated polyaromatic hydrocarbons. The results Indicate that these times are dependent on Interproton distances and thus can be used to distinguish protons with ortho-proton neighbors from those without ortho-proton neighbors. In addition, the longitudinal relaxation time can also qualitatively describe inter-ring Interactions under certain conditions. The measurement Is used for structural elucidation of three cases of unknown chlorinated polyaromatic hydrocarbons, and In each case an unambiguous assignment Is possible. The use of relative proton longitudinal relaxation times for structural Identification should be broadly applicable to many structural problems.

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Use of ¹H Nuclear Magnetic Resonance Longitudinal Relaxation Times in Structure Elucidation of Chlorinated Polyaromatic Compounds

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