Mn NMR spectra of Mn12 single-molecule magnets: Single crystal versus aligned powder studies
نویسندگان
چکیده
X-ray structural, magnetization and Mn single crystal NMR investigations of Mn12O12 (CH2BrCOO)16(4H2O) Æ 4CH2Cl2 indicate that this highly symmetric ðI 4Þ lattice, devoid of hydrogen bonding of the Mn12-framework with the molecules of lattice hydration, might be an improved model for studying single-molecule magnetism. Single crystal NMR yield much enhanced NMR data as compared to magnetically oriented powders, enable determination of Mn hyperfine and quadrupole couplings, and show that the oriented powder samples do not represent an authentic crystal picture. 2005 Published by Elsevier Ltd.
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تاریخ انتشار 2005