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A family of one-dimensional lanthanide complexes bridged by two distinct carboxylate ligands with the Dy analogue displaying magnetic relaxation behaviour

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Abstract

A series of isostructural lanthanide one-dimensional (1D) chain complexes, [Ln(INNO)(Bza)2(H2O)2]·(H2O) {INNO = isonicotinate N-oxide, Bza = benzoic acid; Nd(1), Eu(2), Gd(3), Tb(4), Dy(5), Er(6) and Y(7)}, have been successfully isolated by hydrothermal reactions utilizing two distinct carboxylates as co-ligands. Due to the similar steric hindrance of the two carboxylic ligands, the neighboring lanthanide ions are bridged simultaneously by their carboxyl groups from the opposite sides to form a 1D chain structure. The shape analysis of the eight-coordinated Dy analogue 5 highlights the coordination geometry of the distorted square antiprism (D4d). The solid-state luminescence of 2 and 4 was characterized. The static magnetic analysis of the Gd analogue 3 is indicative of the dominant weak intrachain antiferromagnetic interactions via the carboxylic ligands. Dynamic magnetic measurements for 5 revealed clear slow magnetic relaxation behaviour typical for single-molecule magnets (SMMs). Compound 5 represents a very rare example, reported as a mixed carboxylate bridged lanthanide SMM.

Graphical abstract: A family of one-dimensional lanthanide complexes bridged by two distinct carboxylate ligands with the Dy analogue displaying magnetic relaxation behaviour

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Publication details

The article was received on 27 Jul 2017, accepted on 28 Aug 2017 and first published on 28 Aug 2017


Article type: Paper
DOI: 10.1039/C7DT02736B
Citation: Dalton Trans., 2017, Advance Article
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    A family of one-dimensional lanthanide complexes bridged by two distinct carboxylate ligands with the Dy analogue displaying magnetic relaxation behaviour

    W. Zhu, X. Xiong, C. Gao, S. Li, Y. Zhang, J. Wang, C. Zhang, A. K. Powell and S. Gao, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT02736B

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