Abstract
Dipolar splittings with a quadratic dependence on static magnetic field strength are reported for selected pairs of nuclei in several porphyrins. These splittings are detectable as a result of a slight molecular alignment caused by the interaction of the static magnetic field with the anisotropic magnetic susceptibilities of the porphyrin rings. The magnitude of the splitting yields an effective value for ΔX, the anisotropy of the susceptibility. This value includes association effects which may be estimated therefrom. Dipolar splittings between protons of attached vinyl groups can also be measured, and provide information about the average dihedral angle between the planes of the vinyl group and porphyrin ring.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 935-938 |
| Number of pages | 4 |
| Journal | Magnetic Resonance in Chemistry |
| Volume | 23 |
| Issue number | 11 |
| DOIs | |
| State | Published - 1985 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
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High‐field orientation effects in the high‐resolution proton NMR spectra of diverse porphyrins. / Bothner‐By, A. A.; Gayathri, C.; Van Zijl, Peter C; MacLean, C.; Lai, Jan‐Ji ‐J; Smith, Kevin M.
In: Magnetic Resonance in Chemistry, Vol. 23, No. 11, 1985, p. 935-938.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - High‐field orientation effects in the high‐resolution proton NMR spectra of diverse porphyrins
AU - Bothner‐By, A. A.
AU - Gayathri, C.
AU - Van Zijl, Peter C
AU - MacLean, C.
AU - Lai, Jan‐Ji ‐J
AU - Smith, Kevin M.
PY - 1985
Y1 - 1985
N2 - Dipolar splittings with a quadratic dependence on static magnetic field strength are reported for selected pairs of nuclei in several porphyrins. These splittings are detectable as a result of a slight molecular alignment caused by the interaction of the static magnetic field with the anisotropic magnetic susceptibilities of the porphyrin rings. The magnitude of the splitting yields an effective value for ΔX, the anisotropy of the susceptibility. This value includes association effects which may be estimated therefrom. Dipolar splittings between protons of attached vinyl groups can also be measured, and provide information about the average dihedral angle between the planes of the vinyl group and porphyrin ring.
AB - Dipolar splittings with a quadratic dependence on static magnetic field strength are reported for selected pairs of nuclei in several porphyrins. These splittings are detectable as a result of a slight molecular alignment caused by the interaction of the static magnetic field with the anisotropic magnetic susceptibilities of the porphyrin rings. The magnitude of the splitting yields an effective value for ΔX, the anisotropy of the susceptibility. This value includes association effects which may be estimated therefrom. Dipolar splittings between protons of attached vinyl groups can also be measured, and provide information about the average dihedral angle between the planes of the vinyl group and porphyrin ring.
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U2 - 10.1002/mrc.1260231111
DO - 10.1002/mrc.1260231111
M3 - Article
AN - SCOPUS:84986792496
VL - 23
SP - 935
EP - 938
JO - Magnetic Resonance in Chemistry
JF - Magnetic Resonance in Chemistry
SN - 0749-1581
IS - 11
ER -