INADEQUATE-CR experiments in the solid state.
Through-bond connectivity can be probed by J couplings. For effective two-spin systems, the INADEQUATE experiment is highly valuable in liquid-state spectroscopy. It is the purpose of this Communication to show that in-phase INADEQUATE-CR spectra, where the intensity is concentrated in only one line of the J splitted doublet, can be obtained from solid-state samples. The problem of the cancellation of nonresolved multiplet lines, as experienced typically in INADEQUATE spectra in the solid, is resolved and the (13)C spectra become simpler because the number of resonance lines is reduced. Furthermore, a gain in signal intensity by 2 can, theoretically, be achieved. We limit the discussion to two-spin systems. In the present context, a two-spin system is defined considering the J coupling only. When the dipolar coupling is also taken into account, the two-spin system will usually become a many-spin system, but in the present context this is not relevant.
Verel
R
R
Laboratorium für Physikalische Chemie, Zürich, ETH-Zentrum, CH-8092, Switzerland.
van Beek
J D
JD
Meier
B H
BH
D000818:Animals; D002247:Carbon Isotopes; D019476:Insect Proteins / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D013112:Spiders
D002247:Carbon Isotopes; D019476:Insect Proteins