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Issue 8, 2018
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Weak interactions cause selective cocrystal formation of lanthanide nitrates and tetra-2-pyridinylpyrazine

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Abstract

Two series of cocrystals with the formula Ln(NO3)5·H2TPPZ (Ln = Eu, Tb, Er and Y, TPPZ = 2,3,5,6-tetra-2-pyridinylpyrazine) have been designed and synthesized. Utilizing single crystal structure parsing, we demonstrate how weak hydrogen bonding interactions between lanthanide nitrates and organic molecules stabilize their cocrystal structures. The lanthanide contraction effect is also proposed to help determine the Ln–O bond regularity, hence rationalizing the stability and structural variation of the cocrystals. Furthermore, the luminescence properties of these cocrystals were analyzed in detail. We found an interesting result of decent red fluorescence of the 1-Eu cocrystal complex.

Graphical abstract: Weak interactions cause selective cocrystal formation of lanthanide nitrates and tetra-2-pyridinylpyrazine

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Publication details

The article was received on 05 Dec 2017, accepted on 24 Jan 2018 and first published on 25 Jan 2018


Article type: Paper
DOI: 10.1039/C7CE02098H
Citation: CrystEngComm, 2018,20, 1123-1129
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    Weak interactions cause selective cocrystal formation of lanthanide nitrates and tetra-2-pyridinylpyrazine

    C. Zeng, H. Wu, Z. Luo and J. Yao, CrystEngComm, 2018, 20, 1123
    DOI: 10.1039/C7CE02098H

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