Preparation, crystal structure and thermal stability of porous lanthanide complexes with 5-methyl isophthalic acid
Titel:
Preparation, crystal structure and thermal stability of porous lanthanide complexes with 5-methyl isophthalic acid
Auteur:
An, Qiufeng Ren, Yixia Chen, Sanping Gao, Shengli
Verschenen in:
Journal of coordination chemistry
Paginering:
Jaargang 61 (2008) nr. 24 pagina's 3904-3912
Jaar:
2008
Inhoud:
Three lanthanide complexes 1-3 with 5-methyl isophthalic acid (5-CH3-H2bdc) were prepared under hydrothermal conditions, two have formula Eu2(5-CH3-bdc)3(EtOH) (2) and [Er(5-CH3-bdc)1.5] · (H2O) (3) and were characterized by X-ray single crystal diffraction. In 2, there are two europium(III) ions in seven-coordinate pentagonal bipyramid and eight-coordinate bicapped trigonal prism geometries. Complex 2 is a 3-D porous structure with 1-D channels (potential solvent area = 453 Å3, 15.7%). One crystallographic independent erbium(III) ion exists and lies in a pentagonal bipyramidal geometry in 3, in which one-dimensional channels are rectangular (potential solvent area = 470 Å3, 16.4%). TG-DTG experiments show that these complexes have stability to 750-880°C decomposing to corresponding Ln2O3.