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Superatom Paramagnetism in Au102(SR)441-/0/1+/2+ Oxidation States
Phillip S Window1, Christopher J Ackerson1
1Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States.
Inorganic Chemistry
|February 25, 2020
Summary
Gold nanoclusters exhibit unique magnetic properties. The Au102(SPh)44 nanocluster
Area of Science:
- * Physical Chemistry
- * Nanomaterials Science
- * Solid-State Physics
Background:
- * Gold nanoclusters display unique electronic structures and magnetic properties.
- * Small nanoclusters undergo geometric restructuring for electronic stabilization (Jahn-Teller effect).
- * Larger nanoclusters may not exhibit such geometric distortions.
Purpose of the Study:
- * Investigate the charge-state-dependent magnetism of the Au102(SPh)44 nanocluster.
- * Determine if geometric distortion occurs to stabilize electronic states in different charge states.
Main Methods:
- * Evans method Nuclear Magnetic Resonance (NMR) measurements.
- * Analysis of magnetic properties across various charge states (1-, 0, 1+, 2+).
Main Results:
- * The Au102(SPh)44 nanocluster in the 2+ charge state is paramagnetic.
- * Paramagnetism in the 2+ state indicates unpaired electrons.
- * Absence of geometric distortion to pair electrons in this charge state.
Conclusions:
- * The Au102(SPh)44 nanocluster exhibits charge-state-dependent magnetism.
- * Geometric stabilization mechanisms important in larger clusters may resist electronic distortions in this transition-sized cluster.
- * Findings bridge understanding between molecule-like and bulk-like properties in gold nanoclusters.
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