期刊
DALTON TRANSACTIONS
卷 48, 期 33, 页码 12466-12481出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt02618e
关键词
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资金
- National Natural Science Foundation of China [21703002, 21673180, 21673181, 21773185]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JQ-180]
- Open Foundation of Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education [338050067(2018-008)]
- Doctoral Scientific Research Starting Foundation of Baoji University of Arts and Science [ZK2017024]
- Nanjing Tech University Start-up Foundation [39827109]
Tuning the synthesis conditions and further regulating the magnetic dynamics of single-molecule magnets (SMMs) are crucial challenges for chemists. Some feasible approaches have been developed to understand magneto-structural correlations and regulate relaxation behaviors via rational design. Based on the solvent-induced effect or ligand ratio regulation, three new dysprosium(iii) coordination compounds, [Dy(L)(Dppd)]center dot solvent (1), [Dy(L)(Dppd)] (2) and [Dy(L)(Dppd)(2)]center dot solvent (3) (H2L = N,N '-bis(2-hydroxy-5-methyl-3-formylbenzyl)-N,N '-bis-(pyridin-2-ylmethyl)ethylenediamine, Dppd = dibenzoylmethane) have been successfully prepared. Compounds 1 and 2 are mononuclear structures. 3 is a dinuclear core in which the metal centers are bridged by two phenol-O atoms of one L2- ligand. Dy(iii) cations in compounds 1-3 present acta-coordination geometries. More interestingly, compounds 1 and 2 can be mutually transformed through the reversible single-crystal-to-single-crystal (SCSC) transformation under different solvent environments. The crystals of 1 and 2 underwent a dissolution-precipitation process and changed into 3, respectively. The distinct structures and magnetic properties were determined through combined structural, experimental and theoretical investigations.
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