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A series of Ln4 III clusters: Dy4 single molecule magnet and Tb4 multi-responsive luminescent sensor for Fe3+, CrO4 2-/Cr2O7 2- and 4-nitroaniline.

ABSTRACT: Five tetranuclear lanthanide clusters of compositions [Ln4L4(NO3)2(Piv)2]·2CH3OH (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 [Ln4O6] cores being formed by the fusion of oxygen atom-bridged two [Ln2O2] 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+, CrO4 2-, Cr2O7 2- and 4-nitroaniline (4-NA), demonstrating that complex 2 should be a potential candidate for multi-responsive luminescent sensor.

SUBMITTER: Qin Y 

PROVIDER: S-EPMC9079637 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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A series of Ln<sub>4</sub> <sup>III</sup> clusters: Dy<sub>4</sub> single molecule magnet and Tb<sub>4</sub> multi-responsive luminescent sensor for Fe<sup>3+</sup>, CrO<sub>4</sub> <sup>2-</sup>/Cr<sub>2</sub>O<sub>7</sub> <sup>2-</sup> and 4-nitroaniline.

Qin Yaru Y   Ge Yu Y   Zhang Shasha S   Sun Hao H   Jing Yu Y   Li Yahong Y   Liu Wei W  

RSC advances 20180403 23

Five tetranuclear lanthanide clusters of compositions [Ln<sub>4</sub>L<sub>4</sub>(NO<sub>3</sub>)<sub>2</sub>(Piv)<sub>2</sub>]·2CH<sub>3</sub>OH (Ln = Gd (1), Tb (2), Dy (3), Ho (4), Er (5); H<sub>2</sub>L = 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<sub>4</sub>O<sub>6</sub>] co  ...[more]

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