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Syntheses, structures and properties of novel 3D lanthanide metal-organic frameworks with paddle-wheel building blocks
- Source :
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Inorganica Chimica Acta . May2008, Vol. 361 Issue 7, p2115-2122. 8p. - Publication Year :
- 2008
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Abstract
- Abstract: Three new complexes Ln(BDC)1.5(DEF) [Ln=La(1), Ce(2), Nd(3); H2BDC=1,4-benzenedicarboxylic acid; DEF= N,N-diethylformamide] have been solvothermally synthesized and characterized by single-crystal X-ray diffraction. Complexes 1–3 are isostructural and crystallize in triclinic space group . They display three-dimensional frameworks and 18.7986Å×11.3230Å rhombic channels along the a axis without interpenetration. Two eight-coordinated metal centers are connected with two dimonodentate BDC groups and two chelating/bridging bidentate BDC groups to give a paddle-wheel building block. The building blocks are connected through two carboxyl groups to lead to a one-dimensional infinite inorganic chain (–M–O–C–O–M–) along the [100] direction. Thermogravimetric analyses (TGA) and X-ray powder diffraction (XPRD) were determined for the three complexes. An observed intense blue luminescence with an emission band peaking at 372nm for them may result from ligand-to-metal charge transfer (LMCT). Variable-temperature magnetic susceptibility of 2 and 3 was investigated and found deviated from the Curie–Weiss law. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00201693
- Volume :
- 361
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Inorganica Chimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 31702602
- Full Text :
- https://doi.org/10.1016/j.ica.2007.10.043