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Luminescent Europium(III) Coordination Zippers Linked with Thiophene‐Based Bridges
Author(s) -
Hirai Yuichi,
Nakanishi Takayuki,
Kitagawa Yuichi,
Fushimi Koji,
Seki Tomohiro,
Ito Hajime,
Hasegawa Yasuchika
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201606371
Subject(s) - thiophene , europium , phosphine oxide , chemistry , luminescence , ligand (biochemistry) , coordination polymer , polymer , crystallography , intermolecular force , photochemistry , hydrogen bond , coordination complex , ion , phosphine , materials science , crystal structure , molecule , metal , organic chemistry , catalysis , biochemistry , receptor , optoelectronics
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 °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.