Citation: Wen-Tong CHEN. Structure and Photophysical Properties of an Upconversion Holmium-mercury Compound with a 2-D Layer-like Motif[J]. Chinese Journal of Structural Chemistry, ;2021, 40(1): 70-78. doi: 10.14102/j.cnki.0254–5861.2011–2762 shu

Structure and Photophysical Properties of an Upconversion Holmium-mercury Compound with a 2-D Layer-like Motif

Wen-Tong CHEN ^{a, b, c,,}

a.
Institute of Applied Chemistry, School of Chemistry and Chemical Engineering, Ji'an Key Laboratory of Photoelectric Crystal Materials and Device, Humic Acid Utilization Engineering Research Center of Jiangxi Province, Jiangxi Province Key Laboratory of Coordination Chemistry, Jinggangshan University, Ji'an 343009, China
b.
Department of Ecological and Resources Engineering, Fujian Key Laboratory of Eco-industrial Green Technology, Wuyi University, Wuyishan 354300, China
c.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China

Corresponding author: Wen-Tong CHEN, wtchen_2000@aliyun.com

Dedicated to Professor Jin-Shun Huang on the Occasion of His 80th Birthday

Received Date: 10 February 2020
Accepted Date: 2 April 2020

Fund Project: the NNSFC 21361013Jiangxi Provincial Department of Education's Item of Science and Technology GJJ170637the Open Foundation of State Key Laboratory of Structural Chemistry 20180008

Figures(9)

Using a hydrothermal reaction, a novel holmium-mercury compound {[Ho(IA)(HIA)₂(H₂O)₂]₂-(Hg₃Br₈)}_n(nHgBr₂)·2nNO₃ (1, HIA is isonicotinc acid) was synthesized and its crystal structure was characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in monoclinic system, space group P2/c with a = 13.0647(6), b = 9.4659(3), c = 26.0832(14) Å, β = 97.522(4)°, V = 3197.9(2) Å³, C₃₆H₃₆Br₁₀Hg₄Ho₂N₈O₂₂, M_r = 2863.95, Z = 2, D_c = 2.974 g/cm³, μ(MoKα) = 18.331 mm^–1 and F(000) = 2575. It displays a two-dimensional (2D) layer-like structure. A solid-state photoluminescence experiment revealed that it shows upconversion green emission. The emission peaks should come from the ⁵I₈ → ⁵G₆ and ⁵S₂ → ⁵I₈ characteristic emission of the 4f electrons of the Ho³⁺ ion. Compound 1 has a CIE chromaticity coordinate (0.1774, 0.526). A solid-state UV-visible diffuse reflectance spectrum unveiled that this compound has a wide optical band gap of 3.26 eV.
- CIE,
- holmium,
- lanthanide,
- photoluminescence,
- upconversion
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