Magnetic resonance of the new neutral Al cluster radical [Al7 R6]

Static magnetometry and continuous-wave and pulsed-electron spin resonance (ESR) is used for the characterization of the neutral radical cluster [ Al(Al3R3)2] $^{\bullet}$ ( R = N(SiMe2Ph)2). For temperatures below 25 K, we prove its monoradical character, a g-factor of 1.997$\hbox{--}$1.991, and a...

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Bibliographic Details
Published in:Europhysics letters 2008-05, Vol.82 (3), p.37002-p1-37002-p5
Main Authors: Domingo Köhler, S, Pilawa, B, Saez de Jauregui, D, Fischer, G, Grubba, R, Köppe, R, Schnepf, A, Schnöckel, H, Dormann, E
Format: Article
Language:English
Subjects:
76.30.-v
76.30.Rn
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Summary:Static magnetometry and continuous-wave and pulsed-electron spin resonance (ESR) is used for the characterization of the neutral radical cluster [ Al(Al3R3)2] $^{\bullet}$ ( R = N(SiMe2Ph)2). For temperatures below 25 K, we prove its monoradical character, a g-factor of 1.997$\hbox{--}$1.991, and a three time larger hyperfine interaction with the central than with the six outer 27Al nuclei of the [ Al7R6] $^{\bullet}$ cluster radical. Temperature dependence of the low-temperature spin-lattice relaxation is analysed. At temperatures above 30 K, the effective moment per cluster increases, and the hyperfine interaction with the seven 27Al nuclei is equalized.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/82/37002