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Panagiotis Lianos - One of the best experts on this subject based on the ideXlab platform.
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Highly efficient photoluminescent films made by mixing aminopropyltriethoxysilane, Eu3+ ions, and Thenoyltrifluoroacetone
Applied Physics Letters, 2007Co-Authors: Elias Stathatos, Panagiotis LianosAbstract:A very efficient phosphor based on a nanocomposite organic-inorganic aminopropyltriethoxysilane gel, incorporating Eu3+ ions, and Thenoyltrifluoroacetone has been synthesized. Gels have been deposited as thin films on solid substrates using a sol-gel procedure based on acetic acid solvolysis. The luminescence intensity of this material by near-UV excitation and ligand-to-metal energy transfer was very high. It was equivalent to that of laser dyes and the luminescence quantum yield approached 100%.
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Enhanced photoluminescence from films made of titanium tetraisopropoxide, Eu3+ ions and Thenoyltrifluoroacetone blends
Chemical Physics Letters, 2005Co-Authors: Elias Stathatos, Panagiotis LianosAbstract:Titanium tetraisopropoxide mixed with Thenoyltrifluoroacetone and europium(III) makes uniform and stable intensely photoluminescent films that can be efficiently excited in the near UV. Formation of the film is aided by partial hydrolysis of titanium tetraisopropoxide and condensation due to ambient humidity but also by interaction between this precursor and Thenoyltrifluoroacetone. These films make excellent phosphors that can be easily applied on any solid substrate.
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Preparation of thin Ureasil films with strong photoluminescence based on incorporated europium–Thenoyltrifluoroacetone–bipyridine complexes
Thin Solid Films, 2002Co-Authors: R Moleski, Elias Stathatos, Vlasoula Bekiari, Panagiotis LianosAbstract:Abstract The photoluminescence (PL) of europium ions in the presence of the β-diketonate ligand Thenoyltrifluoroacetone and 2,2′-bipyridine has been studied in poly(ethylene glycol)-200 solutions and in thin films made of Ureasil gels obtained through the sol–gel method. Films emit intense red PL, comparable to that of the laser dye rhodamine, by Near-UV excitation through energy transfer from the organic ligands to europium. Ureasils themselves take part in the energy transfer process.
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preparation of thin ureasil films with strong photoluminescence based on incorporated europium Thenoyltrifluoroacetone bipyridine complexes
Thin Solid Films, 2002Co-Authors: R Moleski, Elias Stathatos, Vlasoula Bekiari, Panagiotis LianosAbstract:Abstract The photoluminescence (PL) of europium ions in the presence of the β-diketonate ligand Thenoyltrifluoroacetone and 2,2′-bipyridine has been studied in poly(ethylene glycol)-200 solutions and in thin films made of Ureasil gels obtained through the sol–gel method. Films emit intense red PL, comparable to that of the laser dye rhodamine, by Near-UV excitation through energy transfer from the organic ligands to europium. Ureasils themselves take part in the energy transfer process.
Elias Stathatos - One of the best experts on this subject based on the ideXlab platform.
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Highly efficient photoluminescent films made by mixing aminopropyltriethoxysilane, Eu3+ ions, and Thenoyltrifluoroacetone
Applied Physics Letters, 2007Co-Authors: Elias Stathatos, Panagiotis LianosAbstract:A very efficient phosphor based on a nanocomposite organic-inorganic aminopropyltriethoxysilane gel, incorporating Eu3+ ions, and Thenoyltrifluoroacetone has been synthesized. Gels have been deposited as thin films on solid substrates using a sol-gel procedure based on acetic acid solvolysis. The luminescence intensity of this material by near-UV excitation and ligand-to-metal energy transfer was very high. It was equivalent to that of laser dyes and the luminescence quantum yield approached 100%.
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Enhanced photoluminescence from films made of titanium tetraisopropoxide, Eu3+ ions and Thenoyltrifluoroacetone blends
Chemical Physics Letters, 2005Co-Authors: Elias Stathatos, Panagiotis LianosAbstract:Titanium tetraisopropoxide mixed with Thenoyltrifluoroacetone and europium(III) makes uniform and stable intensely photoluminescent films that can be efficiently excited in the near UV. Formation of the film is aided by partial hydrolysis of titanium tetraisopropoxide and condensation due to ambient humidity but also by interaction between this precursor and Thenoyltrifluoroacetone. These films make excellent phosphors that can be easily applied on any solid substrate.
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Preparation of thin Ureasil films with strong photoluminescence based on incorporated europium–Thenoyltrifluoroacetone–bipyridine complexes
Thin Solid Films, 2002Co-Authors: R Moleski, Elias Stathatos, Vlasoula Bekiari, Panagiotis LianosAbstract:Abstract The photoluminescence (PL) of europium ions in the presence of the β-diketonate ligand Thenoyltrifluoroacetone and 2,2′-bipyridine has been studied in poly(ethylene glycol)-200 solutions and in thin films made of Ureasil gels obtained through the sol–gel method. Films emit intense red PL, comparable to that of the laser dye rhodamine, by Near-UV excitation through energy transfer from the organic ligands to europium. Ureasils themselves take part in the energy transfer process.
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preparation of thin ureasil films with strong photoluminescence based on incorporated europium Thenoyltrifluoroacetone bipyridine complexes
Thin Solid Films, 2002Co-Authors: R Moleski, Elias Stathatos, Vlasoula Bekiari, Panagiotis LianosAbstract:Abstract The photoluminescence (PL) of europium ions in the presence of the β-diketonate ligand Thenoyltrifluoroacetone and 2,2′-bipyridine has been studied in poly(ethylene glycol)-200 solutions and in thin films made of Ureasil gels obtained through the sol–gel method. Films emit intense red PL, comparable to that of the laser dye rhodamine, by Near-UV excitation through energy transfer from the organic ligands to europium. Ureasils themselves take part in the energy transfer process.
Tatsuya Sekine - One of the best experts on this subject based on the ideXlab platform.
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Solvent Extraction of Scandium(III) with Hexafluoroacetylacetone into Chloroform in the Absence and Presence of Tetrabutylammonium Ions or Trioctylphosphine Oxide
Bulletin of the Chemical Society of Japan, 1993Co-Authors: Junji Noro, Tatsuya SekineAbstract:The anionic chelate of scandium(III) with hexafluoroacetylacetone (Hhfa) was extracted into chloroform in the presence of the tetrabutylammonium ion (tba+), though such an anionic chelate was not extracted when the chelating extractant was 2-Thenoyltrifluoroacetone (Htta). The extraction was also studied in the same systems in the presence of trioctylphosphine oxide (TOPO); the extraction of the anionic complex, Sc(hfa)4−tba+, was compared with that of the adducts with TOPO, Sc(hfa)3(TOPO)n.
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solvent extraction of anionic chelate complexes of lanthanum iii europium iii lutetium iii scandium iii and indium iii with 2 Thenoyltrifluoroacetone as ion pairs with tetrabutylammonium ions
Bulletin of the Chemical Society of Japan, 1992Co-Authors: Junji Noro, Tatsuya SekineAbstract:The solvent extraction of lanthanum(III), europium(III), lutetium(III), scandium(III), and indium(III) in 0.1 mol dm−3 sodium nitrate solutions with 2-Thenoyltrifluoroacetone (Htta) in the absence ...
Bing Yan - One of the best experts on this subject based on the ideXlab platform.
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lanthanide eu3 tb3 β diketone modified mesoporous sba 15 organic polymer hybrids chemically bonded construction physical characterization and photophysical properties
Inorganic Chemistry, 2009Co-Authors: Bing YanAbstract:Novel organic−inorganic mesoporous luminescent polymeric hybrid materials containing lanthanide (Eu3+, Tb3+) complexes covalently bonded to mesoporous silica SBA-15 have been successfully prepared by co-condensation of the modified 2-Thenoyltrifluoroacetone (TTA−Si) and tetraethoxysilane (TEOS) in the presence of Pluronic P123 surfactant as a template. 2Z-Thenoyltrifluoroacetone (TTA) was grafted onto the coupling agent 3-(triethoxysilyl)-propyl isocyanate (TEPIC) and used as the first precursor, and the other precursor PMMA was synthesized through the addition polymerization reaction of the monomer methyl methacrylate. Then these precursors coordinated to rare earth ions, and the final mesoporous polymeric hybrid materials Ln(TTA-SBA-15)3PMMA (Ln = Eu, Tb) were obtained after hydrolysis and copolycondensation with the tetraethoxysilane (TEOS) via a sol−gel process. In addition, for comparison, SBA-15 covalently bonded with the binary Ln3+ complexes with TTA ligand were also synthesized, denoted as Ln(TTA...
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covalently bonding assembly and photophysical properties of luminescent molecular hybrids eu tta si and eu ttasi mcm 41 by modified Thenoyltrifluoroacetone
Microporous and Mesoporous Materials, 2009Co-Authors: Bing Yan, Bing ZhouAbstract:Abstract In the context, the two novel kinds of hybrid materials, TTA–Si directly chemically bonded molecular hybrids and the corresponding MCM-41 host assembling hybrids were prepared. The organic–inorganic mesoporous luminescent materials were synthesized by linking Eu 3+ complexes to the functionalized ordered mesoporous MCM-41 with modified Thenoyltrifluoroacetone (TTA–Si) by co-condensation of tetraethoxysilane (TEOS) in the presence of the cetyltrimethylammonium bromide (CTAB) surfactant as template. Thenoyltrifluoroacetone (TTA) was grafted with coupling agent 3-(triethoxysilyl)-propyl isocyanate and the as-derived functional bridge molecule (denoted as TTA–Si) was introduced into inorganic polymeric host MCM-41 through covalent bonds, resulting in the molecular hybrid material. The luminescence properties of these resulting materials were characterized in detail, and the results reveal that they all have high surface area, uniformity in the mesostructure and crystallinity. The efficient intramolecular energy transfer in mesoporous material Eu–TTASi–MCM-41 mainly occurs between the modified ligand TTA–Si and the central Eu 3+ ion. In addition, the constructed covalently bonded hybrids present the longer luminescent lifetimes than common Eu(III) β-diketones complexes for improvement of stability. Especially the mesoporous luminescent material Eu–TTASi–MCM-41possesses high luminescence quantum efficiency .
Kiyoshi Sawada - One of the best experts on this subject based on the ideXlab platform.
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Synergistic Extraction and Solution Structures of Ternary Complexes of Lanthanoids with 2-Thenoyltrifluoroacetone and Linear Poly(oxyethylene) in 1,2-Dichloroethane
Bulletin of the Chemical Society of Japan, 2007Co-Authors: Gene Frederick Gagabe, Yuta Satoh, Keiichi Satoh, Kiyoshi SawadaAbstract:Synergistic extraction of Thenoyltrifluoroacetone (tta) complexes of 14 trivalent lanthanoids (Ln3+) into 1,2-dichloroethane with linear poly(oxyethylene) compounds (POE) was investigated at 25.0 °...