A "Molecular Water Pipe": A Giant Tubular Cluster {Dy<sub>72</sub> } Exhibits Fast Proton Transport and Slow Magnetic Relaxation.

Qin, Lei; Yu, You-Zhu; Liao, Pei-Qin; Xue, Wei; Zheng, Zhiping; Chen, Xiao-Ming; Zheng, Yan-Zhen · Adv Mater · 2016

basic_science · Level V

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Abstract

A lanthanide cluster, PCC-72, which is the second largest, with 72 Dy(III) ions assembled into an unprecedented tubular structure, is synthesized. Remarkably, PCC-72 exhibits superionic proton conductivity (>10<sup>-4</sup> S cm<sup>-1</sup> ) under both ambient (with relative humidity RH < 75%) and hot (T > 90 °C, RH = 95%) conditions. Moreover, slow magnetic relaxation is observed, making PCC-72 the largest Dy(III) cluster that is a single-molecule magnet.