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Synthesis, Structures, Luminescence, and Magnetic Properties of Two Three‐dimensional Lanthanide Organic Frameworks Comprising Pyrazine‐2,3‐dicarboxylic Acid
Author(s) -
Hou XiangYang,
Wang Xiao,
Gao Lou Jun,
Fu Feng,
Wang Ji Jiang,
Cao Jia
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300559
Subject(s) - isostructural , lanthanide , pyrazine , monoclinic crystal system , thermogravimetry , luminescence , crystallography , dicarboxylic acid , magnetic susceptibility , infrared spectroscopy , photoluminescence , materials science , crystal structure , chemistry , inorganic chemistry , ion , stereochemistry , polymer chemistry , organic chemistry , optoelectronics
Two three‐dimensional (3D) lanthanide coordination polymers (CPs) of the general formula [ Ln 2 (PDOA) 3 (H 2 O)] n · 2 n H 2 O [ Ln = Gd ( 1 ), Tb ( 2 )] were synthesized by solvothermal reactions of the corresponding rare‐earth chloride and pyrazine‐2,3‐dicarboxylic acid (H 2 PDOA). The CPs were structurally characterized by single‐crystal X‐ray diffraction, IR spectroscopy, thermogravimetry, and elemental analysis. CPs 1 and 2 are isostructural and crystallize in the monoclinic space group P 2 1 / c . The frameworks are constructed from dinuclear lanthanide building blocks in which the PDOA 2– ions adopt three coordination modes, μ 3 ‐ k O; k O; k N,O, μ 4 ‐ k N,O; k O; k O; k O,O, and μ 5 ‐ k N,O; k O; k O; k O,O; k O, respectively. The Tb 3+ polymer of 2 exhibits characteristic photoluminescence in the visible region. The magnetic properties of CP 1 were investigated by measuring the magnetic susceptibilities in the temperature range 1.8–300 K.