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An organic chromophore modified samarium-containing polyoxometalates: excitation-dependent color tunable behavior from organics to lanthanide ion

Abstract

Here, an organic-inorganic hybrid lanthanide-based polyoxometalate (Ln-POM) [N(CH3)4]3K2Sm(C7H5O2)(H2O)2(α-PW11O39)]·11H2O (1) was successfully synthesized and characterized well by several physicochemical techniques. In the polyanion of 1, the benzoic acid ligand directly binds Sm3+ ion for the formation of an organic-inorganic hybrid polyanion. This organic-inorganic hybrid structure can effectively sensitize the emissions of Sm3+ ion, which have been confirmed by photoluminescence and time-resolved emission spectroscopy of 1. The photoluminescence study demonstrates that Sm3+ ion possesses a relatively high-symmetric coordination geometry, which is well consistent with the structural analysis of Sm3+ ion in 1. Furthermore, the polyanion of 1 can form a 3D 4,8-topology framework through the linkage of K1 and K2 ions. In addition, the color-tunable photoluminescence properties of 1 have been explored, revealing 1 shows a reversible color-tunable photoluminescence property based on excitation from 260 nm to 350 nm, emitting color from blue to pink.

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Publication details

The article was received on 14 Sep 2019, accepted on 25 Nov 2019 and first published on 26 Nov 2019


Article type: Paper
DOI: 10.1039/C9DT03681D
Dalton Trans., 2019, Accepted Manuscript

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    An organic chromophore modified samarium-containing polyoxometalates: excitation-dependent color tunable behavior from organics to lanthanide ion

    J. Niu, H. Wu, B. Yan, R. Liang, V. Singh, P. Ma and J. Wang, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT03681D

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