resumo
Two series of isoreticular chiral metal organic frameworks assembled from Ln(III) (Ln = Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb), Na(I), and chiral flexible-achiral rigid dicarboxylate ligands, formulated as [NaLn(Tart)(BDC)(H2O)(2)) (S1) and [NaLn(Tart)(biBDC)(H2O)(2)] (S2) (H(2)Tart = tartaric acid; H2BDC = terephthalic acid; H(2)biBDC = biphenyl-4,4'-dicarboxylic acid), were obtained as single phases under hydrothermal conditions. The compounds have been studied by single-crystal and powder X-ray diffraction, thermal analyses (TG-MS and DSC), vibrational spectroscopy (FTIR), scanning electron microscopy (SEM-EDX), elemental analysis, and X-ray thermodiffractometry. The catalytic activity has been also investigated. The photoluminescence properties of selected compounds have been investigated, exhibiting room temperature tunable UV-vis-IR light emission.
palavras-chave
LANTHANIDE COORDINATION POLYMERS; RESOLVED FLUOROMETRIC ASSAY; NEAR-INFRARED-LUMINESCENCE; PHOTOPHYSICAL PROPERTIES; ADSORPTION PROPERTIES; HYDROGEN ADSORPTION; MAGNETIC-PROPERTIES; CRYSTAL-STRUCTURE; GAS-ADSORPTION; PHOTOLUMINESCENCE
categoria
Chemistry
autores
Amghouz, Z; Garcia-Granda, S; Garcia, JR; Ferreira, RAS; Mafra, L; Carlos, LD; Rocha, J
nossos autores
João Rocha
Prof. Catedrático
Luís Carlos
Professor Catedrático
Luís Mafra
Investigador Principal
Maria Rute de Amorim e Sá Ferreira André
Professor Catedráticoagradecimentos
We thank financial support from Spanish Ministerio de Ciencia e Innovacion (MAT2010-15094, MAT2006-01997, Factoria de Cristalizacion - Consolider Ingenio 2010, and FPI Grant BES-2007-14340 to Z.A.) and FEDER. The authors are also grateful to Prof. Jose Gimeno for helping us to carry out the catalysis studies.