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Syntheses, Structures and Magnetic Properties of Rare Earth Metal‐Organic Frameworks (REMOFs) Templated by Silicotungstic Heteropolyanion
Author(s) -
Qin Tianzhu,
Cao Feng,
Zhu Wenhua,
Dai Yong,
Zhang Meng,
Zhang Yu,
Zhang Chi,
Wang Juan
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801610
Subject(s) - isostructural , silicotungstic acid , cationic polymerization , pyridine , materials science , antiferromagnetism , crystallography , chemistry , inorganic chemistry , polymer chemistry , crystal structure , organic chemistry , catalysis , physics , condensed matter physics
Two new rare earth metal‐organic frameworks (REMOFs) [Ln(pydc)(H 2 O) 4 ] 4 SiW 12 O 40 ⋅ x H 2 O (Ln= Pr ( 1 ), Nd ( 2 ) ; pydc=2,6‐pyridine dicarboxylic acid; x = 4.51, 4.64) have been hydrothermally synthesized. The compounds are isostructural, and each possesses a 3D zeolite‐like cationic framework with the GIS topology. The typical Keggin‐anions [SiW 12 O 40 ] 4− are located in the nano‐sized cages through electrostatic interaction and strong hydrogen bonding interaction. Our results indicate that Keggin‐type silicotungstic heteropolyanion is an efficient template for the construction and stabilization of 3D REMOFs. Magnetic measurements of compound 2 reveal the presence of a small anisotropy of the Nd III ions. The thermal and solid‐state fluorluminescent properties of both compounds have been investigated as well.