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Syntheses, Structures, and Luminescence Properties of Lanthanide Coordination Polymers with a Polycarboxylic Terpyridyl Derivative Ligand
Author(s) -
Xie Juan,
Shu HuiMing,
Hu HuaiMing,
Han ZhongXi,
Shen SaSa,
Yuan Fei,
Yang MengLin,
Dong FaXin,
Xue GangLin
Publication year - 2014
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402030
Subject(s) - lanthanide , lanthanide contraction , chemistry , luminescence , crystallography , ligand (biochemistry) , crystal structure , metal organic framework , thermal stability , terpyridine , ion , derivative (finance) , stereochemistry , metal , materials science , organic chemistry , biochemistry , receptor , optoelectronics , adsorption , financial economics , economics
Solvothermal reactions of lanthanide chloride with a new ligand, H 3 L, 4′‐(3‐carboxylpyridyl)‐2,2′:6′,2“‐terpyridine‐6,6”‐dicarboxylic acid, yields seven new lanthanide–organic frameworks: {[Ln 2 L 2 ] ⋅ H 2 O} n (Ln=Pr ( 1 ), Nd ( 2 ), Sm ( 3 ), Eu ( 4 )), {[Ln 5 L 4 (COO) 3 (H 2 O) 4 ] ⋅ 10 H 2 O} n (Ln=Tb ( 5 ), Dy ( 6 )), and [Yb 2 L 2 (H 2 O) 2 ] ⋅ 2 H 2 O ( 7 ). Single‐crystal X‐ray diffraction reveals that these complexes belong to three structural types. Type I ( 1 – 4 ) consists of lanthanide–carboxyl group layers pillared by L 3− to form a three‐dimensional network. Type II ( 5 and 6 ) comprises a right‐handed helical chain and a left‐handed helical chain linked through L 3− anions into a three‐dimensional framework. Type III ( 7 ) is a discrete dinuclear structure. The structural change is due to the decrease in the metal coordination number from nine for the large ions to seven for the small ions; this demonstrates the effect of lanthanide contraction. These materials exhibit high thermal stability. In addition, the luminescent properties of these complexes are discussed.