A series of Ln4 III clusters: Dy4 single molecule magnet and Tb4 multi- responsive luminescent sensor for Fe3+, CrO42-/Cr2O72- and 4-nitroaniline

作者：Qin Yaru; Ge Yu; Zhang Shasha; Sun Hao; Jing Yu; Li Yahong; Liu Wei

来源：RSC Advances, 2018, 8(23): 12641-12652.

DOI：10.1039/c8ra01485j

Five tetranuclear lanthanide clusters of compositions [Ln(4)L(4)(NO3)(2)(Piv)(2)]<bold></bold>2CH(3)OH (Ln = Gd (1), Tb (2), Dy (3), Ho (4), Er (5); H2L = 2-(((2-hydroxy-3-methoxybenzyl)imino)methyl)-6-methoxyphenol; Piv = pivalic acid) were synthesized under solvothermal conditions. The structures of 1-5 were characterized by single-crystal X-ray crystallography. Complexes 1-5 possess a zig-zag topology with [Ln(4)O(6)] cores being formed by the fusion of oxygen atom-bridged two [Ln(2)O(2)] moieties. Direct-current magnetic susceptibility studied in the 2-300 K range revealed weak antiferromagnetic interactions in 1, 2, 4, 5 and ferromagnetic interactions in 3. Complex 3 exhibits single molecule magnet (SMM) behavior. The luminescence studies indicated that complex 2 can serve as highly sensitive and selective luminescent materials for Fe3+, CrO42-, Cr2O72- and 4-nitroaniline (4-NA), demonstrating that complex 2 should be a potential candidate for multi-responsive luminescent sensor.

• 出版日期2018
• 单位苏州大学