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

Magnetochemistry

Emil Roduner¹  Christopher Jensen¹ 

[1] Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany; E-Mail:

关键词: superatom concept;    Pt₁₃ nanoclusters;    shell structure;    hyperfine couplings;    high-spin states;    super-diamagnetism;    granular superconductivity;   

DOI  :  10.3390/magnetochemistry1010028

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.