4129-45-7Relevant academic research and scientific papers
Effective Photo- and Triboluminescent Europium(III) Coordination Polymers with Rigid Triangular Spacer Ligands
Hasegawa, Yasuchika,Tateno, Shiori,Yamamoto, Masanori,Nakanishi, Takayuki,Kitagawa, Yuichi,Seki, Tomohiro,Ito, Hajime,Fushimi, Koji
, p. 2666 - 2672 (2017)
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.
Luminescent studies of binuclear ternary europium(III) pyridineoxide tetrazolate complexes containing bis-phosphine oxide as auxiliary co-ligands
Mal, Suraj,Pietraszkiewicz, Marek,Pietraszkiewicz, Oksana
, p. 370 - 375 (2018)
A new class of antenna chromophores so called ‘tetrazolates’ have not been explored much for lanthanide luminescencent complexes. However, we have already published several articles considering pyridineoxide tetrazolates as sensitizer with lanthanide ions. Although this class of antenna attracted much less attention because of its poor photoluminescence quantum yields (tris-pyridineoxide tetrazolate europium complex?=?13% in solution) we tried and successfully achieved to improve the photoluminescence quantum yields for this particular antenna molecule by replacing coordinated water from the inner coordination sphere of europium ion by introducing phosphine oxides as additional chromophore. In the present article the two bis-phosphine oxides attach two molecules of tris-pyridineoxide tetrazolate europium(III) complex which leads to the improvement of the overall molar absorption coefficients as well as photo-physical properties of the complexes. We found more than two-fold increase (31% in solution) in photoluminescence quantum yield with one of the coordinated phosphine oxides comparing with that of tris-pyridineoxide tetrazolate europium(III) complex.
A Luminescent Dinuclear EuIII/TbIII Complex with LMCT Band as a Single-Molecular Thermosensor
Yanagisawa, Kei,Kitagawa, Yuichi,Nakanishi, Takayuki,Seki, Tomohiro,Fushimi, Koji,Ito, Hajime,Hasegawa, Yasuchika
, p. 1956 - 1961 (2018)
Temperature-dependent luminescence of a dinuclear EuIII/TbIII complex with a seven-coordinate structure is demonstrated. The dinuclear complex is composed of two lanthanide ions, six tetramethylheptanedionate ligands, and a bidentate phosphine oxide linker ligand. The dinuclear structure of the complex was characterized by single-crystal XRD. Intrinsic 4f–4f emission quantum yields of the dinuclear EuIII and TbIII complexes were 66 and 61 %, respectively. The luminescence color of the dinuclear EuIII/TbIII complex changed from red to green with increasing temperature. The thermosensing range based on the ratio of luminescence intensity (AEu/ATb) was 100–450 K. The temperature-dependent luminescence is due to the presence of a ligand-to-metal charge-transfer state.
Spiral Eu(iii) coordination polymers with circularly polarized luminescence
Hasegawa, Yasuchika,Miura, Yui,Kitagawa, Yuichi,Wada, Satoshi,Nakanishi, Takayuki,Fushimi, Koji,Seki, Tomohiro,Ito, Hajime,Iwasa, Takeshi,Taketsugu, Tetsuya,Gon, Masayuki,Tanaka, Kazuo,Chujo, Yoshiki,Hattori, Shingo,Karasawa, Masanobu,Ishii, Kazuyuki
, p. 10695 - 10697 (2018)
A spiral-type chiral Eu(iii) coordination polymer showed strong luminescence (emission quantum yield Φf-f = 57% and photosensitized energy transfer efficiency ηsens = 53%) and effective CD and CPL properties (gCPL = 0.17)
The development of a new approach toward lanthanide-based OLED fabrication: new host materials for Tb-based emitters
Aslandukov, Andrey N.,Utochnikova, Valentina V.,Goriachiy, Dmitry O.,Vashchenko, Andrey A.,Tsymbarenko, Dmitry M.,Hoffmann, Michael,Pietraszkiewicz, Marek,Kuzmina, Natalia P.
, p. 16350 - 16357 (2018/11/27)
To develop the recently proposed approach toward host selection for lanthanide-based emitters, four phosphine oxides PO = PO1-PO4 were investigated which are able to both increase the electron mobility and to sensitize terbium luminescence. New highly sol
SUPRAMOLECULAR METAL COMPLEX PARTICLE, FILM AND METHOD FOR PRODUCING SUPRAMOLECULAR METAL COMPLEX PARTICLE
-
Paragraph 0088, (2018/06/26)
PROBLEM TO BE SOLVED: To provide a supramolecular metal complex particle that has a uniform particle size and particle shape, and excellent dispersion stability. SOLUTION: A supramolecular metal complex particle has at least, a supramolecular metal comple
Ligand-Assisted Back Energy Transfer in Luminescent TbIII Complexes for Thermosensing Properties
Yamamoto, Masanori,Kitagawa, Yuichi,Nakanishi, Takayuki,Fushimi, Koji,Hasegawa, Yasuchika
, p. 17719 - 17726 (2018/11/27)
A luminescent TbIII complex with a hexafluoroacetylacetone (hfa) ligand shows a characteristic back energy transfer (BEnT), which leads to high temperature sensitivity and potential application as a thermosensitive paint. Ligand-assisted BEnT was observed when a phosphine oxide ligand was introduced into Tb(hfa)3 complex, which was shown to affect the activation energy (ΔEa) and frequency factor (A) in the BEnT process between TbIII ion and hfa ligands. According to temperature-dependent emission-lifetime measurements of mononuclear Tb(hfa)3 complexes with monodentate phosphine oxides and polynuclear Tb(hfa)3 complexes with bidentate phosphine oxides, the ΔEa and A values of polynuclear TbIII complexes were smaller than those of mononuclear TbIII complexes. Phosphorescence spectra and lifetimes of each Gd(hfa)3 complex revealed that excited states of hfa ligands in TbIIIcomplexes differed from those of the polynuclear TbIII complexes and mononuclear TbIII complexes. The differences in the ΔEa and A values between polynuclear and mononuclear TbIII complexes were caused by the formation of different excited states, such as delocalization of the excited state in the polynuclear TbIII complexes and localization of excited states in the mononuclear TbIII complexes. In particular, small ΔEa and A values of polynuclear TbIII complexes provided high, effective activation of the BEnT at low temperature, which resulted in high-sensitive temperature-dependent phosphor materials over a wide temperature range.
Luminescent Thin Films Composed of Nanosized Europium Coordination Polymers on Glass Electrodes
Hasegawa, Yasuchika,Sugawara, Takeshi,Nakanishi, Takayuki,Kitagawa, Yuichi,Takada, Makoto,Niwa, Akitsugu,Naito, Hiroyoshi,Fushimi, Koji
, p. 187 - 193 (2016/03/12)
Luminescent thin films composed of thermostable lanthanide coordination polymers on glass electrodes were prepared using a novel combination of micelle reactions and electrochemical deposition techniques. The micelle-encapsulated luminescent polymers were
THIN FILM FOR ORGANIC ELECTROLUMINESCENCE (EL) DEVICE AND METHOD FOR MANUFACTURING SAME
-
Paragraph 0263-0265, (2016/12/07)
The present invention relates to a novel method for manufacturing a thin film of a rare earth complex polymer with low solubility in an organic solvent and further relates to a novel organic EL device comprising a thin film of a rare earth complex polymer
Thermo-stable lanthanoid coordination nanoparticles composed of luminescent Eu(III) complexes and organic joint ligands using micelle techniques in water
Hiromitsu, Onodera,Nakanishi, Takayuki,Fushimi, Koji,Hasegawa, Yasuchika
, p. 1386 - 1390 (2015/02/19)
Strong luminescent nanoparticles composed of lanthanoid coordination polymers using micelle reaction techniques, lanthanoid coordination nanoparticles, are reported. Size of the nanoparticles estimated using dynamic light-scattering measurements were foun
