Multiple-quantum and two-dimensional gas phase NMR

Seth Blackwell, Gerard Harbison

Research output: Contribution to journalArticle

Abstract

We introduce experiments designed to measure double- and zero-quantum frequencies and relaxation in the gas phase. We use a combination of phase cycling and gradients to achieve multiple quantum selectivity, and we note that conventional gradient strategies will not work because of the high diffusion constants of low-molecular-weight gases. We therefore choose the lengths of the gradients so that unwanted coherences fall at nodes in the integrated magnetization. We propose a related sequence that allows measurement of relaxation of either double- or zero-quantum coherence. Finally, we show T 2 relaxation curves for the 1H and 13C single-quantum relaxation, as well as the zero- and double-quantum relaxation, in 13C1-acetylene at natural abundance.

Original languageEnglish (US)
Pages (from-to)381-386
Number of pages6
JournaleMagRes
Volume6
Issue number3
DOIs
StatePublished - Jan 1 2017

Fingerprint

Gases
Nuclear magnetic resonance
Acetylene
Magnetization
Molecular Weight
Molecular weight
Experiments

Keywords

  • Acetylene
  • Diffusion
  • Gas-phase NMR
  • Gradients
  • Spin relaxation
  • SR coupling

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging
  • Spectroscopy

Cite this

Multiple-quantum and two-dimensional gas phase NMR. / Blackwell, Seth; Harbison, Gerard.

In: eMagRes, Vol. 6, No. 3, 01.01.2017, p. 381-386.

Research output: Contribution to journalArticle

Blackwell, Seth ; Harbison, Gerard. / Multiple-quantum and two-dimensional gas phase NMR. In: eMagRes. 2017 ; Vol. 6, No. 3. pp. 381-386.
@article{a2cc544c9ce147c7a816520219c8c7a8,
title = "Multiple-quantum and two-dimensional gas phase NMR",
abstract = "We introduce experiments designed to measure double- and zero-quantum frequencies and relaxation in the gas phase. We use a combination of phase cycling and gradients to achieve multiple quantum selectivity, and we note that conventional gradient strategies will not work because of the high diffusion constants of low-molecular-weight gases. We therefore choose the lengths of the gradients so that unwanted coherences fall at nodes in the integrated magnetization. We propose a related sequence that allows measurement of relaxation of either double- or zero-quantum coherence. Finally, we show T 2 relaxation curves for the 1H and 13C single-quantum relaxation, as well as the zero- and double-quantum relaxation, in 13C1-acetylene at natural abundance.",
keywords = "Acetylene, Diffusion, Gas-phase NMR, Gradients, Spin relaxation, SR coupling",
author = "Seth Blackwell and Gerard Harbison",
year = "2017",
month = "1",
day = "1",
doi = "10.1002/9780470034590.emrstm1539",
language = "English (US)",
volume = "6",
pages = "381--386",
journal = "eMagRes",
issn = "2055-6101",
publisher = "Blackwell",
number = "3",

}

TY - JOUR

T1 - Multiple-quantum and two-dimensional gas phase NMR

AU - Blackwell, Seth

AU - Harbison, Gerard

PY - 2017/1/1

Y1 - 2017/1/1

N2 - We introduce experiments designed to measure double- and zero-quantum frequencies and relaxation in the gas phase. We use a combination of phase cycling and gradients to achieve multiple quantum selectivity, and we note that conventional gradient strategies will not work because of the high diffusion constants of low-molecular-weight gases. We therefore choose the lengths of the gradients so that unwanted coherences fall at nodes in the integrated magnetization. We propose a related sequence that allows measurement of relaxation of either double- or zero-quantum coherence. Finally, we show T 2 relaxation curves for the 1H and 13C single-quantum relaxation, as well as the zero- and double-quantum relaxation, in 13C1-acetylene at natural abundance.

AB - We introduce experiments designed to measure double- and zero-quantum frequencies and relaxation in the gas phase. We use a combination of phase cycling and gradients to achieve multiple quantum selectivity, and we note that conventional gradient strategies will not work because of the high diffusion constants of low-molecular-weight gases. We therefore choose the lengths of the gradients so that unwanted coherences fall at nodes in the integrated magnetization. We propose a related sequence that allows measurement of relaxation of either double- or zero-quantum coherence. Finally, we show T 2 relaxation curves for the 1H and 13C single-quantum relaxation, as well as the zero- and double-quantum relaxation, in 13C1-acetylene at natural abundance.

KW - Acetylene

KW - Diffusion

KW - Gas-phase NMR

KW - Gradients

KW - Spin relaxation

KW - SR coupling

UR - http://www.scopus.com/inward/record.url?scp=85046801577&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046801577&partnerID=8YFLogxK

U2 - 10.1002/9780470034590.emrstm1539

DO - 10.1002/9780470034590.emrstm1539

M3 - Article

VL - 6

SP - 381

EP - 386

JO - eMagRes

JF - eMagRes

SN - 2055-6101

IS - 3

ER -