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Magnetochemistry 2015, 1(1), 28-44; doi:10.3390/magnetochemistry1010028

Magnetic Properties and the Superatom Character of 13-Atom Platinum Nanoclusters

1
Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
2
Chemistry Department, University of Pretoria, Pretoria 0002, South Africa
Present address: ThyssenKrupp Industrial Solutions AG, Business Unit Process Technologies, Neubeckumer Straße 127, D-59320 Ennigerloh, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Carlos J. Gómez García
Received: 25 October 2015 / Revised: 16 November 2015 / Accepted: 18 November 2015 / Published: 26 November 2015
(This article belongs to the Special Issue Magnetochemistry: From Fundamentals to Applications)
View Full-Text   |   Download PDF [1739 KB, uploaded 26 November 2015]   |  

Abstract

13-atom platinum nanoclusters have been synthesized quantitatively in the pores of the zeolites NaY and KL. They reveal highly interesting magnetic properties like high-spin states, a blocking temperature, and super-diamagnetism, depending heavily on the loading of chemisorbed hydrogen. Additionally, EPR active states are observed. All of these magnetic properties are understood best if one considers the near-spherical clusters as analogs of transition metal atoms with low-spin and high-spin states, and with delocalized molecular orbitals which have a structure similar to that of atomic orbitals. These clusters are, therefore, called superatoms, and it is their analogy with normal atoms which is in the focus of the present work, but further phenomena, like the observation of a magnetic blocking temperature and the possibility of superconductivity, are discussed. View Full-Text
Keywords: superatom concept; Pt13 nanoclusters; shell structure; hyperfine couplings; high-spin states; super-diamagnetism; granular superconductivity superatom concept; Pt13 nanoclusters; shell structure; hyperfine couplings; high-spin states; super-diamagnetism; granular superconductivity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Roduner, E.; Jensen, C. Magnetic Properties and the Superatom Character of 13-Atom Platinum Nanoclusters. Magnetochemistry 2015, 1, 28-44.

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