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Series of Lanthanide-Mercury Compounds with Three-Dimensional Structures: Rational Preparation, Structures and
Wen-Tong Chen1, Zhuan-Xia Zhang1, Hui Luo1
1Institute of Applied Chemistry, School of Chemistry and Chemical Engineering , Jinggangshan University , Ji'an , Jiangxi 343009 , P. R. China.
Abstract:
Three novel Ln-Hg complexes [Ln(H2O)2(μ-IA)3Hg3Br6] n (Ln = Pr (1), Nd (2), and Er (3); HIA is isonicotinic acid) are synthesized and characterized. They feature three-dimensional (3-D) motifs. Solid-state UV/vis diffuse reflectance spectroscopy found that their band gaps are 4.91, 4.59, and 2.68 eV. It is found that lanthanide ions could adjust the band structures of semiconductors. Their photoluminescence comes from their characteristic emissions of 1D2 → 3H4 of Pr3+, 7F7/2 → 4S3/2 and 4F3/2 → 4I9/2 of Nd3+, and 4I15/2 → 4F7/2 and 4I15/2 → 4S3/2 of Er3+. The CIE chromaticity coordinate is ( x = 0.5726, y = 0.4206), ( x = 0.7268, y = 0.2732), and ( x = 0.2923, y = 0.4317). Their magnetization susceptibility totally obeys the Curie-Weiss equation with antiferromagnetic performances.
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