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Magnetic moment determination of micro‐sized solid samples by proton magnetic resonance spectroscopy. A new split peak which can be used to determine the magnetic susceptibility of solid micro samples
Author(s) -
Furuhashi Akiko,
Ono Isao,
Yamasaki Akira
Publication year - 1991
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260291204
Subject(s) - chemistry , diamagnetism , analytical chemistry (journal) , nuclear magnetic resonance , magnetic moment , unpaired electron , capillary action , spectroscopy , proton , proton magnetic resonance , magnetic field , condensed matter physics , materials science , physics , radical , chromatography , organic chemistry , quantum mechanics , composite material
Abstract The magnetic moment of a micro‐sized solid sample can be semi‐quantitatively determined by proton magnetic resonance spectral measurement with the sample in a capillary cell coaxially placed within an NMR tube containing a suitable diamagnetic solvent with a standard such as TMS. Small signals appearing on the low‐frequency side of the main peaks can be assigned to the protons in the layer of the solution surrounding the outer surface of the coaxially placed capillary. The molar chemical shift difference of this signal splitting is proportional to the square of the magnetic moment (μ) or n ( n + 2), where n is equal to the number of unpaired electrons in the sample.