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Single molecule magnetic behaviour in lanthanide naphthalenesulfonate complexes

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posted on 2023-06-09, 15:57 authored by Guo Peng, Ying-Ying Zhang, Bo Li, Xiao-Fan Sun, Hong-Ling Cai, De-Jing Li, Zhi-Gang Gu, George KostakisGeorge Kostakis
The use of 2-naphthalenesulfonate (NAS) ligand in lanthanide chemistry afforded a family of isostructural mononuclear lanthanide complexes with formula [Ln(NAS)2(H2O)6](NAS)·3H2O [Ln = Tb (1), Dy (2), Er (3), Yb (4)]. Crystallographic studies determine a square antiprismatic geometry (D4d) for the Ln centre and crystallization in unprecedented chiral space group. The latter was further confirmed by the observation of Cotton effects in single crystal circular dichroism (CD) spectra. Static and dynamic magnetic measurements identify weak intermolecular dipolar interactions in 2, and such effects can be waived by dilution, which was noted by the detection of zero-field single molecule magnet (SMM) behaviour and hysteresis loop in the magnetically diluted sample (5). Compounds 2-4 exhibit SMM behaviours with energy barriers of 53, 32 and 45 K, respectively. To the best of our knowledge, these complexes provide the first examples of pure 4f sulfonate-based SMMs.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Dalton Transactions

ISSN

1477-9226

Publisher

Royal Society of Chemistry

Volume

47

Page range

17349-17356

Department affiliated with

  • Chemistry Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-11-20

First Open Access (FOA) Date

2019-11-19

First Compliant Deposit (FCD) Date

2018-11-19

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