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A Series of 3D Rare‐Earth‐Metal–Organic Frameworks with Isolated Guest Keggin Silicotungstate Fragments as Anion Templates
Author(s) -
Li Suzhi,
Zhang Dongdi,
Guo Yuanyuan,
Ma Pengtao,
Zhao Junwei,
Wang Jingping,
Niu Jingyang
Publication year - 2011
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201100944
Subject(s) - isostructural , chemistry , luminescence , thermogravimetric analysis , crystallography , photoluminescence , metal , lanthanide , template , pyridine , powder diffraction , metal organic framework , rare earth , inorganic chemistry , ion , crystal structure , nanotechnology , mineralogy , organic chemistry , materials science , optoelectronics , adsorption
Six rare‐earth (RE) metal constructed 3D metal–organic frameworks, [RE(pydc)(H 2 O) n ] 4 [SiW 12 O 40 ] · 4H 2 O [RE = Tm III ( 1 ), Y III ( 2 ), Pr III ( 3 ), La III ( 4 ), Sm III ( 5 ), Eu III ( 6 ); n = 3 ( 1 , 2 ), 4 ( 3 – 6 ); H 2 pydc = pyridine‐2,6‐dicarboxylic acid], have been synthesized and characterized by elemental analyses, inductively coupled plasma techniques, IR and UV spectroscopy, thermogravimetric analyses (for 1 and 3 ), X‐ray powder diffraction, and single‐crystal X‐ray diffraction. The structural analyses indicate that 1 – 6 are basically isostructural and show a rare host 3D framework that contains [SiW 12 O 40 ] 4– Keggin polyoxoanions as templates. Photoluminescence measurements reveal that 1 – 5 show the luminescence of pydc ligands, whereas 6 displays a unique red luminescence.