title: Di- and octa-nuclear dysprosium clusters derived from pyridyl-triazole based ligand: {Dy2} showing single molecule magnetic behaviour.
abstract: Two dysprosium aggregates, formulated as [Dy2(μ-OH)2(H2bpte)2Cl2(MeOH)2]Cl2(1), and [Dy8(μ-OH)8(bpte)8]·24H2O (2) (H2bpte = 1,2-bis(3-(pyridin-2-yl)-1H-1,2,4-triazol-5-yl)ethane), were obtained using solvothermal reactions. Upon changing the metal salt and synthetic reaction conditions, an eight-member {Dy8} (2) ring was isolated. Complex 1 is centrosymmetric in which two {Dy2} clusters are connecting to each other through the hydrogen bonding. Complex 2 forms an eight-member DyIIIring with an inner diameter of 4.5 Å and is the first reported {Dy8(μ-OH)8} core in lanthanide-hydroxo clusters. The H2bpte ligand displays trans,trans- and cis,cis-coordination modes in 1 and 2, respectively. Alternating current (ac) magnetic measurements of both complexes were carried out. In 1, the out-of-phase susceptibilities (χ''M) below 9 K confirm the slow relaxation of magnetization, which is a typical characteristic of single-molecule magnets (SMMs).
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China. liujliang5@mail.sysu.edu.cn tongml@mail.sysu.edu.cn.
authors.forename: Muhammad Nadeem
authors.initials: MN
authors.lastname: Akhtar
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China. liujliang5@mail.sysu.edu.cn tongml@mail.sysu.edu.cn.
authors.forename: Xiao-Fen
authors.initials: XF
authors.lastname: Liao
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China. liujliang5@mail.sysu.edu.cn tongml@mail.sysu.edu.cn.
authors.forename: Yan-Cong
authors.identifier: http://orcid.org/0000-0001-5047-3445
authors.initials: YC
authors.lastname: Chen
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China. liujliang5@mail.sysu.edu.cn tongml@mail.sysu.edu.cn.
authors.forename: Jun-Liang
authors.identifier: http://orcid.org/0000-0002-5811-6300
authors.initials: JL
authors.lastname: Liu
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China. liujliang5@mail.sysu.edu.cn tongml@mail.sysu.edu.cn.
authors.forename: Ming-Liang
authors.identifier: http://orcid.org/0000-0003-4725-0798
authors.initials: ML
authors.lastname: Tong