Solid State Nuclear Magnetic Resonance

The partial 1H NMR spectra of Al-OH and H2Omol in hydrous aluminosilicate glasses: Component-Resolved analysis of 27Al-1H cross polarization and 1H spin-echo spectra

from ScienceDirect Publication: Solid State Nuclear Magnetic Resonance

Publication year: 2010
Source: Solid State Nuclear Magnetic Resonance, In Press, Accepted Manuscript, Available online 9 April 2010
Wim J., Malfait , Xianyu, Xue
The Component-Resolved methodology was applied to ¹H spin-echo and ²⁷Al-¹H cross polarization data of aluminosilicate glasses. The method was able to resolve two components with different T2 relaxation rates, hydroxyl groups (OH) and molecular water (H₂O_mol), from the spin-echo data and to determine partial spectra and the relative abundances of OH and H₂O_mol. The algorithm resolved two to three components with different ²⁷Al-¹H CP dynamics from the ²⁷Al-¹H cross polarization data; the obtained partial NMR spectra for Al-OH are in excellent agreement with those obtained previously from the difference spectra and confirm previous quantitative results and models for the Al-OH, Si-OH and H₂O_mol speciation (Malfait and Xue, 2010).

Nuclear hyperpolarization in solids and the prospects for nuclear spintronics

from ScienceDirect Publication: Solid State Nuclear Magnetic Resonance

Publication year: 2010
Source: Solid State Nuclear Magnetic Resonance, In Press, Accepted Manuscript, Available online 7 April 2010
Jeffrey A., Reimer
Nuclear hyperpolarization can be achieved in a number of ways. This article focuses on the use of coupling of nuclei to (nearly) pure quantum states, with particular emphasis on those states obtained by optical excitation in bulk semiconductors. I seek an answer to this question: ”What is to prevent the design and analysis of nuclear spintronics devices that use the extremely long-lived hyperpolarized nuclear spin states, and their weak couplings to each other, to affect computation, memory, or informational technology schemes?” The answer, I argue, is in part because there remains a lack of fundamental understanding of how to generate and control nuclear polarization with schemes other than with rf coils.