期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 39, 页码 12059-12062出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201606371
关键词
coordination polymers; energy transfer; europium; luminescence; thermal stability
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [2401, 24102012]
- Grants-in-Aid for Scientific Research [24102012, 16J01352] Funding Source: KAKEN
Novel Eu-III coordination polymers [Eu(hfa)(3)(dpt)](n)(dpt: 2,5-bis(diphenylphosphoryl)thiophene) and [Eu(hfa)(3)(dpedot)](n) (dpedot: 2,5-bis(diphenylphosphoryl)ethylenedioxythiophene) with hydrogen-bonded zipper structures are reported. The coordination polymers are composed of Eu-III ions, hexafluoroacetylacetonato ligands, and thiophene-based phosphine oxide bridges. The zig-zag orientation of single polymer chains induced the formation of densely packed coordination structures with multiple intermolecular interactions, resulting in thermal stability above 300 degrees C. They exhibit a high intrinsic emission quantum yield (ca. 80%) due to their asymmetrical and low-vibrational coordination structures around Eu-III ions. Furthermore, the characteristic alternative orientation of substituents also contributes to the dramatically high ligand-to-metal energy transfer efficiencies of up to 80% in the solid state.
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