Abstract
A new 2D europium coordination polymer, {[Eu2(Bript)3(H2O)2]·2(H2O)}n (1) [H2Bript = 4-bromoisophthalic acid], was prepared by hydrothermal synthesis and characterized by IR spectroscopy, elemental analysis, thermogravimetric analysis, powder X-ray diffraction and single-crystal X-ray diffraction. The carboxylate oxygen atoms of Bript ligands link the neighboring Eu(III) ions to form a Eu(III)–carboxylate chain with the Eu⋯Eu separations of 3.982 and 5.585 Å, which the chains are further extend into a two-dimensional network. The 3D fluorescence spectra of 1 were detected at room temperature under the excitation and emission wavelengths range of 250–450 and 420–750 nm with the same interval of 5 nm, respectively. The lifetime of 1 in solid-state at room temperature is up to 0.935 ms. The magnetic result shows an antiferromagnetic coupling between the paramagnetic metal cations. Moreover, in vitro MTT assays at different concentrations of 1 have also been investigated and the results reveal that complex 1 was low cytotoxic.
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Acknowledgements
This work was supported by the Special Funds of Guangdong College Students’ Scientific and Technological Innovation Cultivation (pdjh2017b0551), the Natural Science Foundation of Guangdong Province (2015A030310407), the characteristics of innovative projects in Colleges and Universities in Guangdong Province (2015KTSCX156), the Training Plan of Guangdong Province Outstanding Young Teachers in Higher Education Institutions (YQ2015168) and the Natural Science Foundation of Zhaoqing University (201532).
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Ma, D., Wang, J., Qin, L. et al. A New 2D Europium(III) Coordination Polymer Based on 4-Bromoisophthalate Ligand: Synthesis, X-ray Structure, Luminescent and Magnetic Properties. J Inorg Organomet Polym 27, 1514–1520 (2017). https://doi.org/10.1007/s10904-017-0611-z
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DOI: https://doi.org/10.1007/s10904-017-0611-z