title: Effective Photo- and Triboluminescent Europium(III) Coordination Polymers with Rigid Triangular Spacer Ligands.
abstract: Luminescent EuIIIcoordination polymers with rigid triangular spacer ligands are reported. The EuIIIcoordination polymer, [Eu3(hfa)9(tppb)2]n(hfa: hexafluoroacetylacetonate, tppb: tris(4-diphenylphosphorylphenyl)benzene), shows high thermo-stability (decomposition temperature=354 °C) and photoluminescence quantum yield (Φ4f-4f=82 %, photosensitized energy transfer efficiency=78 %). The triboluminescence efficiency of EuIIIcoordination polymer with triangular spacers under laser pulse irradiation (Nd:YAG, λ=1064 nm, pulse width=5 ns, pulse energy=0.1 mJ) is calculated to be 49 %. Characteristic triangular structure, high emission quantum yield, effective photosensitized energy transfer, and remarkable triboluminescence properties of EuIIIcoordination polymers are demonstrated for the first time.
authors.affiliation: Faculty of Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
authors.forename: Yasuchika
authors.initials: Y
authors.lastname: Hasegawa
authors.affiliation: Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
authors.forename: Shiori
authors.initials: S
authors.lastname: Tateno
authors.affiliation: Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Yamamoto
authors.affiliation: Faculty of Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Nakanishi
authors.affiliation: Faculty of Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kitagawa
authors.affiliation: Faculty of Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Seki
authors.affiliation: Faculty of Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
authors.forename: Hajime
authors.initials: H
authors.lastname: Ito
authors.affiliation: Faculty of Engineering, Hokkaido University, Kita-13 Jo, Nishi-8 Chome, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Fushimi
keywords: coordination polymers; europium; lanthanide complexes; luminescence; triboluminescence