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Hydrothermal Syntheses and Structural Studies of Lanthanide Coordination Polymers Involving In‐Situ Decarboxylation and their Luminescence Properties
Author(s) -
Han ZhengBo,
Cheng XiaoNing,
Li XiaoFeng,
Chen XiaoMing
Publication year - 2005
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.200400462
Subject(s) - lanthanide , decarboxylation , hydrothermal circulation , carboxylate , ligand (biochemistry) , luminescence , crystallography , chemistry , molecule , metal , crystal structure , polymer , hydrothermal synthesis , coordination polymer , fluorescence , stereochemistry , materials science , inorganic chemistry , organic chemistry , ion , catalysis , chemical engineering , biochemistry , receptor , optoelectronics , physics , quantum mechanics , engineering
Lanthanide coordination polymers with the formula [Ln(pydc) 2 ]·H 2 O (Ln = La, 1 ; Nd, 2 ; pydc = 3,4‐pyridinedicarboxylate) and [Ln(pydc)(ina)(H 2 O) 2 ] (Ln = Sm, 3 ; Eu, 4 ; Tb, 5 ; Dy, 6 ; pydc = 3,4‐pyridinedicarboxylate, ina = isonicotinate) were synthesized by treating Ln III nitrates with 3,4‐pyridinedicarboxylic acid under hydrothermal conditions. Single‐crystal and powder X‐ray diffraction studies indicate that these lanthanide coordination polymers adopt two different structures. The lighter lanthanide compounds 1 and 2 consist of extended two‐dimensional layer structures with the thickness of ca. 1.7 nm. While the heavier lanthanide compounds 3 ‐ 6 have pydc‐bridged double chain structures with one chelating carboxylate group of ina ligand and two water molecules on each metal center. Interestingly, decarboxylation occurred and pydc was partially transformed into ina in the hydrothermal reactions of 3 ‐ 6 . The fluorescence activities of compounds 4 and 5 are reported.