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Syntheses, Structures, and Photoluminescence of Lanthanide Coordination Polymers Based on 4‐Oxo‐1,4‐dihydro‐2,6‐pyridinedicarboxylic acid
Author(s) -
Qian Jing,
Li Lei,
Gu Wen,
Peng JingWei,
Qiao WeiWei,
Sun MeiMei
Publication year - 2018
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.201700385
Subject(s) - isostructural , monoclinic crystal system , lanthanide , crystallography , ligand (biochemistry) , luminescence , coordination complex , chemistry , crystal structure , coordination polymer , photoluminescence , enol , group (periodic table) , stereochemistry , materials science , ion , metal , catalysis , organic chemistry , biochemistry , receptor , optoelectronics
Investigating the coordination chemistry of H 2 CDA (4‐oxo‐1,4‐dihydro‐2,6‐pyridinedicarboxylic acid) with rare earth salts Ln (NO 3 ) 3 under hydrothermal conditions, structure transformation phenomenon was observed. The ligand, H 2 CDA charged to its position isomer, enol type structure, H 3 CAM (4‐hydroxypyridine‐2,6‐dicarboxylic acid). Six new lanthanide(III) coordination polymers with the formulas [ Ln (CAM)(H 2 O) 3 ] n [ Ln = La ( 1 ), Pr, ( 2 )] and {[ Ln (CAM)(H 2 O) 3 ] · H 2 O} n [ Ln = Nd, ( 3 ), Sm, ( 4 ), Eu, ( 5 ), Y, ( 6 )] were synthesized and characterized. The X‐ray structure analyses show two kinds of coordination structures. The complexes 1 and 2 and 3 – 6 are isostructural. Complexes 1 and 2 crystallize in the monoclinic C 2 / c space group, whereas 3 – 6 crystallize in the monoclinic system with space group P 2 1 / n . In the two kinds of structures, H 3 CAM displays two different coordination modes. The Sm III and Eu III complexes exhibit the corresponding characteristic luminescence in the visible region at an excitation of 376 nm.