Single molecule magnetic behaviour in lanthanide naphthalenesulfonate complexes

Peng, Guo, Zhang, Ying-Ying, Li, Bo, Sun, Xiao-Fan, Cai, Hong-Ling, Li, De-Jing, Gu, Zhi-Gang and Kostakis, George E (2018) Single molecule magnetic behaviour in lanthanide naphthalenesulfonate complexes. Dalton Transactions, 47. pp. 17349-17356. ISSN 1477-9226

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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.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry > QD0146 Inorganic chemistry
Depositing User: Georgios Kostakis
Date Deposited: 20 Nov 2018 12:52
Last Modified: 19 Nov 2019 02:00

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