Multipole-multimode Floquet theory of rotational resonance width experiments: 13C-13C distance measurements in uniformly labeled solids.
A formal description of zero-quantum (ZQ) NMR processes using multipole-multimode Floquet theory is proposed for studying polarization transfer in magic angle spinning experiments. Specifically, we investigate the factors affecting the accuracy and precision of 13C-13C distance measurements that are based on ZQ-magnetization exchange processes in rotational resonance width experiments. With suitable examples drawn from measurements in N-acetyl-[U-13C,15N]-L-valine-L-leucine, we substantiate our approach and propose methods for improving the accuracy and reliability of such 13C-13C distance measurements in uniformly 13C, 15N-labeled solids. In addition, the theoretical model presented in this article provides a more general framework for describing relaxation phenomena involving multiple decay rate constants in zero-quantum processes.
Ramachandran
Ramesh
R
Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Lewandowski
Józef R
JR
van der Wel
Patrick C A
PC
Griffin
Robert G
RG
D002247:Carbon Isotopes / Q000737:chemistry*; D002627:Chemistry, Physical / Q000379:methods*; D003198:Computer Simulation; D007930:Leucine / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods*; D008958:Models, Molecular; D015233:Models, Statistical; D008962:Models, Theoretical; D008968:Molecular Conformation; D009587:Nitrogen Isotopes / Q000737:chemistry; D011789:Quantum Theory; D015203:Reproducibility of Results; D014633:Valine / Q000737:chemistry
D002247:Carbon Isotopes; D009587:Nitrogen Isotopes; D007930:Leucine; D014633:Valine