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‘Trade-Off’ Photoluminescent Behavior of Eu3+ Ions in (EuxGd1−x)2(C2O4)3(H2O)6 Molecular Alloys

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Abstract

A series of molecular alloy based on rare earth (RE) oxalate (EuxGd1−x)2(C2O4)3(H2O)6 (abbr. as EuxGd1−x-OX, x = 0.1–0.9) were synthesized using hydrothermal reaction. The PXRD profiles of EuxGd1−x-OX (x = 0.1–0.9) match well with the simulated pattern calculated from the single crystal data of Nd2(C2O4)3(H2O)6 reported previously, indicating that the as-prepared molecular alloys are isomorphic to Nd2(C2O4)3(H2O)6. EDS and ICP measurements proved the coexistence of Eu and Gd elements in this series of alloys. The photoluminescent (PL) behaviors of EuxGd1−x-OX (x = 0.1–0.9) as well as the physical mixed RE oxalates solids were carefully studied. It is found that the PL intensity of EuxGd1−x-OX with small amount of Gd3+ ion is obviously enhanced due to reducing dipole–dipole, dipole–quadrupole or quadrupole–quadrupole interaction between emitters of Eu3+ ions as well as energy transfer from Gd3+ ion to Eu3+ ion. This study demonstrates that forming molecular alloy by introducing proper ion is an efficient strategy to get improved PL materials.

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Acknowledgements

Authors thank the National Natural Science Foundation of China and the Natural Science Foundation of Jiangsu Province for their financial support (Grant Nos. 21601084, 21671100, BK20130918).

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Correspondence to Wen-Bo Pei.

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Jing, ZY., Deng, ZR., Chen, X. et al. ‘Trade-Off’ Photoluminescent Behavior of Eu3+ Ions in (EuxGd1−x)2(C2O4)3(H2O)6 Molecular Alloys. J Inorg Organomet Polym 28, 1648–1654 (2018). https://doi.org/10.1007/s10904-018-0857-0

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