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A novel neodymium-mercury material with red photoluminescence: synthesis, characterization, photophysical properties and energy transfer mechanism

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Abstract

A novel neodymium-mercury material with a two-dimensional (2-D) layer-like structure, namely [Nd(HIA)2(H2O)2Hg2Cl5(IA)]nn(HgCl2)·5nH2O·nCl (marked as 1; HIA means isonicotinic acid), has been successfully synthesized through a solvothermal reaction. The crystal structure of compound 1 was determined by using the single-crystal X-ray diffraction method. The neodymium ion has eightfold coordination and shows a slightly distorted square anti-prism motif. The neodymium ions are interconnected via the isonicotinic acid ligands to form a one-dimensional (1-D) –Nd–(HIA)4–Nd–(HIA)2–Nd–(HIA)4–Nd–(HIA)2–Nd– chain. The 1-D chains are further interlinked by the Hg2+ ions from the (Hg2Cl5)− moieties to yield a 2-D layer. The Hg2+ ions have two- and fourfold coordination motifs. Compound 1 shows a photoluminescence emission in the red region which is resulted from the 4F9/2 → 4I9/2 transition of the neodymium ions, as revealed by the energy transfer mechanism investigation. The CIE (Commission Internationale de I'Éclairage) chromaticity coordinates of compound 1 are 0.6868 and 0.313. The CT (color temperature) is 38399 K. Compound 1 has a wide band gap of 2.62 eV, as found by the solid-state UV–Visible diffuse reflectance spectrum.

Graphical abstract

A novel neodymium-mercury material with a two-dimensional layer-like structure has been successfully synthesized. The neodymium ion has eightfold coordination and shows a slightly distorted square anti-prism motif. The Hg2+ ions have two- and fourfold coordination motifs. It exhibits a photoluminescence emission in the red region which is resulted from the 4F9/2 → 4I9/2 transition. The CIE chromaticity coordinates are 0.6868 and 0.313. The CT is 38399 K. It has a wide band gap of 2.62 eV.

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Acknowledgements

This work was supported by the Science and Technology Planning Project of Nan Ping, Fujian, China (N2020Z008); Central Special Project for Fujian Local Science and Technology Development (2019L3021); the National Natural Science of Foundation of China (22265014, 22168018); Natural Science Foundation of Jinagxi Province of China (20202BAB204003).

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Authors and Affiliations

  1. Institute of Applied Chemistry, School of Chemistry and Chemical Engineering, Ji’an Key Laboratory of Photoelectric Crystal Materials and Device, Jiangxi Province Key Laboratory of Coordination Chemistry, Humic Acid Utilization Engineering Research Center of Jiangxi Province, Jinggangshan University, Ji’an, 343009, Jiangxi, China

    De-Yong He, Li-Jun Wei, Yu-Yue Xu, Zhi-Gang Luo & Wen-Tong Chen

  2. Department of Ecological and Resources Engineering, Fujian Key Laboratory of Eco-Industrial Green Technology, Wuyi University, Wuyishan, 354300, Fujian, China

    Wen-Tong Chen & Wei-Sheng Lin

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  1. De-Yong He
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Correspondence to Wen-Tong Chen.

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He, DY., Wei, LJ., Xu, YY. et al. A novel neodymium-mercury material with red photoluminescence: synthesis, characterization, photophysical properties and energy transfer mechanism. J IRAN CHEM SOC 20, 1323–1331 (2023). https://doi.org/10.1007/s13738-023-02757-2

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