Hydrothermal synthesis, crystal structures and photoluminescence properties of mixed europium-yttrium organic frameworks

authors	Han, YF; Fu, LS; Mafra, L; Shi, FN
nationality	International
journal	JOURNAL OF SOLID STATE CHEMISTRY
author keywords	Metal-organic framework; Mixed lanthanide; Light-emitter; Photoluminescence; Topology
keywords	COORDINATION POLYMERS; CORE/SHELL NANOCRYSTALS; LUMINESCENT PROPERTIES; EMISSION-SPECTRA; GROWTH
abstract	Three mixed europium-yttrium organic frameworks: Eu2-xYx(Mel)(H2O)(6) (Mel=mellitic acid or benzene-1,2,3,4,5,6-hexacarboxylic acid, x=0.38 1, 0.74 2, and 0.86 3) have been synthesized and characterized. All the compounds contain a 3-D net with (4, 8)-flu topology. The study indicates that the photoluminescence properties are effectively affected by the different ratios of europium and yttrium ions, the quantum efficiency is increased and the Eu3+ lifetime becomes longer in these MOFs than those of the Eu analog. (C) 2011 Elsevier Inc. All rights reserved.
publisher	ACADEMIC PRESS INC ELSEVIER SCIENCE
issn	0022-4596
year published	2012
volume	186
beginning page	165
ending page	170
digital object identifier (doi)	10.1016/j.jssc.2011.12.007
web of science category	Chemistry, Inorganic & Nuclear; Chemistry, Physical
subject category	Chemistry
unique article identifier	WOS:000299801400025