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Issue 45, 2018
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Slow magnetic relaxation in a Tb(III)-based coordination polymer

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A Tb(III)-based coordination polymer (polyTb) was synthesized by complexation of Tb(NO3)3·(6H2O) and 4′,4′′′′-[1,1′-biphenyl]-4,4′-diylbis[6,6′′-bis(ethoxycarbonyl)2′:6′,2′′-terpyridine](L). The polymer structure was determined by Job's plots, DFT calculation, and X-ray absorption fine structure (XAFS) measurement. Job's plots indicated that the mole ratio (Tb ion : L) is 1 : 1. The optimized model structures suggested a La model: the LaN6⋯(O[double bond, length as m-dash]C)2 model. The bond distances of La–O and La–N are ∼2.80 Å and 2.60 Å, respectively. The EXAFS fitting indicated that the bond distances of Tb–O and Tb–N are 2.65 Å and 2.95 Å, respectively. polyTb shows field-induced magnetic relaxation in the solid and solution state. The luminescence of polyTb, originating from an f–f transition, was observed (ϕ = 6.9%). polyTb formed a porous structure on a Si substrate, whereas a fibrous complex structure was formed on glass. polyTb chains are orientated on glass, which were determined by XRD.

Graphical abstract: Slow magnetic relaxation in a Tb(iii)-based coordination polymer

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The article was received on 31 Jul 2018, accepted on 18 Sep 2018 and first published on 18 Sep 2018

Article type: Paper
DOI: 10.1039/C8DT03125H
Citation: Dalton Trans., 2018,47, 16066-16071
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    Slow magnetic relaxation in a Tb(III)-based coordination polymer

    T. Yoshida, Y. S. L. V. Narayana, H. Abe and M. Higuchi, Dalton Trans., 2018, 47, 16066
    DOI: 10.1039/C8DT03125H

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