کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1407491 1501916 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, characterization and photoluminescence properties of two new europium(III) coordination polymers with 3D open framework
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis, characterization and photoluminescence properties of two new europium(III) coordination polymers with 3D open framework
چکیده انگلیسی

The 3D open framework coordination polymers, [Eu2(fum)3(H2O)4]n·3nH2O (1, fum=fumaric acid) and [Eu(pdc)(Hpdc)]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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 796, Issues 1–3, 30 August 2006, Pages 187–194
نویسندگان
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