Synthesis, structure and enhanced photoluminescence properties of two robust, water stable calcium and magnesium coordination networks

Feng Xu; Hao Wang; Simon J. Teat; Wei Liu; Qibin Xia; Zhong Li; Jing Li

doi:10.1039/C5DT03705K

Synthesis, structure and enhanced photoluminescence properties of two robust, water stable calcium and magnesium coordination networks

Feng Xu,^a^b Hao Wang,^a Simon J. Teat,^c Wei Liu,^a Qibin Xia,^a^b Zhong Li^b and Jing Li*^a

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* Corresponding authors

^a Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, USA
E-mail: Jingli@rutgers.edu

^b School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P.R. China

^c Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, USA

Abstract

Two new 3D coordination networks Ca(cca)·H₂O (1) and Mg(cca)·2H₂O (2) (H₂cca = 4-carboxycinnamic acid) are synthesized by solvothermal reactions and characterized by single crystal and powder X-ray diffraction, thermogravimetric analysis, optical diffuse reflection, photoluminescence spectroscopy, and internal quantum yield measurements. Crystal structure analysis reveals that compound 1 is built from edge-sharing chains of seven-coordinated calcium polyhedra, which are connected by the cca ligand to form a 2D layered structure. Compound 2 contains isolated magnesium polyhedra layers. These layers are linked by cca ligands to complete the 3D connectivity. Both compounds 1 and 2 have high thermal stability and remain intact in aqueous solutions of a broad range of pH values ranging from 3 to 11. Both compounds also show significantly enhanced luminescence with respect to the free ligand, giving rise to an increase in quantum yield by as much as 4-fold.

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The article was received on 22 Sep 2015, accepted on 29 Oct 2015 and first published on 29 Oct 2015

Article type: Paper

DOI: 10.1039/C5DT03705K

Author version available: Download Author version (PDF)

Citation: Dalton Trans., 2015,44, 20459-20463

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Synthesis, structure and enhanced photoluminescence properties of two robust, water stable calcium and magnesium coordination networks

F. Xu, H. Wang, S. J. Teat, W. Liu, Q. Xia, Z. Li and J. Li, Dalton Trans., 2015, 44, 20459
DOI: 10.1039/C5DT03705K
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Synthesis, structure and enhanced photoluminescence properties of two robust, water stable calcium and magnesium coordination networks

Abstract

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Synthesis, structure and enhanced photoluminescence properties of two robust, water stable calcium and magnesium coordination networks

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