Synthesis, characterization and photoluminescence properties of two new europium(III) coordination polymers with 3D open framework

The 3D open framework coordination polymers, [Eu 2( fum) 3(H 2O) 4] n ·3 nH 2O ( 1, fum=fumaric acid) and [Eu( pdc)(H pdc)] n ( 2, pdc=pyridine-2,5-dicarboxylic acid) have been synthesized via hydrothermal procedure. Their molecular structures were determined by single-crystal X-ray diffraction anal...

Full description

Saved in:
Bibliographic Details
Published in:Journal of molecular structure 2006-08, Vol.796 (1), p.187-194
Main Authors: Zhang, Guoqi, Wang, Qian, Qian, Yan, Yang, Guoqiang, Shi Ma, Jin
Format: Article
Language:English
Subjects:
Coordination polymer
Europium(III)
Hydrothermal synthesis
Open-framework
Photoluminescence
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The 3D open framework coordination polymers, [Eu 2( fum) 3(H 2O) 4] n ·3 nH 2O ( 1, fum=fumaric acid) and [Eu( pdc)(H pdc)] n ( 2, pdc=pyridine-2,5-dicarboxylic acid) have been synthesized via hydrothermal procedure. Their molecular structures were determined by single-crystal X-ray diffraction analysis. Polymer 1 adopts a 3D microporous structure filled with disordered free water molecules which interact by hydrogen bonds with terminal water bound to the metal centers. IR spectroscopy, TGA and powder X-ray diffraction analysis revealed that the remarkable dehydration–rehydration process of open-framework 1 is completely reversible. Polymer 2 forms a 3D framework composed of 2D grid-like inorganic subnetworks and pdc ligands as linkers. This solid is highly stable up to 405 °C. The solid-state photoluminescence measurements exhibited red light-emitting characteristic of two europium(III) coordination polymers. Moreover, the anhydrous products were found to be more strongly fluorescent and be of longer lifetime.
ISSN:0022-2860
1872-8014
DOI:10.1016/j.molstruc.2006.01.048