A family of 3D lanthanide-organic frameworks constructed from parallelogram secondary building units: synthesis, structures and propertiesElectronic supplementary information (ESI) available. CCDC 957777-957783. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c3ce42197j

• Main Authors: Sun, Ya-guang, Li, Jian, Li, Ke-long, Xu, Zhen-he, Ding, Fu, Ren, Bao-yi, Wang, Shu-ju, You, Li-xin, Xiong, Gang, Smet, Philippe F
• Format: Journal Article
• Language: English
• Published: 03.02.2014
• ISSN: 1466-8033
• DOI: 10.1039/c3ce42197j

A family of lanthanide-organic frameworks, {Ln 2 (pyip)(ox) 2.5 (H 2 O) 5 } n (Ln = La ( 1 ), Pr ( 2 ), Sm ( 3 ), Eu ( 4 ), Gd ( 5 ), Tb ( 6 ), Dy ( 7 )) has been synthesized based on mixed bridging ligands, H 2 pyip and oxalate anion (H 2 pyip = 5-(4-pyridyl)-isophthalic acid, H 2 ox = oxalic acid) and characterized by elemental analysis, Fourier transform infrared spectroscopy, steady state and time-resolved luminescence spectroscopy, thermogravimetric analysis, powder X-ray diffraction and single-crystal X-ray diffraction. The single-crystal X-ray diffraction analysis results show that complexes 1-7 are isostructural. They crystallize in the same P 2 1 / c space group and exhibit a (3,4)-connected {4 2 ·6·8 2 ·10}{8 2 ·10} topology, being a 2-nodal net topology. The luminescence properties of 3 , 4 , 6 , and 7 were investigated and related to the structural properties. The magnetic studies reveal that strong ferromagnetic coupling exists in compound 6 . Seven lanthanide-organic frameworks have been synthesized based on H 2 pyip and oxalate anion. They all present a 3D framework. The magnetic studies reveal that strong ferromagnetic coupling exists in compound 6 .