Volume 82, Number 3, May 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||16 April 2008|
Magnetic resonance of the new neutral Al cluster radical [ Al7R6]
Physikalisches Institut, Universität Karlsruhe (TH) - D-76128 Karlsruhe, Germany, EU
2 Institut für Anorganische Chemie, Universität Karlsruhe (TH) - D-76128 Karlsruhe, Germany, EU
Corresponding author: email@example.com
Accepted: 5 March 2008
Static magnetometry and continuous-wave and pulsed-electron spin resonance (ESR) is used for the characterization of the neutral radical cluster [ Al(Al3R3)2] ( R = N(SiMe2Ph)2). For temperatures below 25 K, we prove its monoradical character, a g-factor of 1.9971.991, and a three time larger hyperfine interaction with the central than with the six outer 27Al nuclei of the [ Al7R6] 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.
PACS: 76.30.-v – Electron paramagnetic resonance and relaxation / 76.30.Rn – Free radicals
© EPLA, 2008
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