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APPLICATIONS OF DSCPCF MODEL IN RARE EARTH COMPLEXES(Ⅴ)——ANALYSIS OF SPECTRA OF THE NEODYMIUM AND ERBIUM TETR A (2-thenoyltrifluoroacetone) MONO PIPERIDINE COMPLEXES

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Science China Chemistry 1987年第9期 907-921页

作者：杨频王越奎 Shanxi University Institute of Molecular Science Taiyuan

The complexes, Nd（TTA）·HP and Er（TTA）·HP, have been prepared, and their UV-VIS-NIR absorption spectra measured. The matrix element expressions with J=1/2—15/2 of fand fconfigurations in Dsymmetry field were derived with the Double Sphere Coordination Point Charge Field Model. And the influence of change in symmetry of the complex unit REOon splitting of their levels was discussed. Based on theoretical calculations, the absorption peaks in the spectra were assigned.

关键词： Nd ANALYSIS OF SPECTRA OF THE NEODYMIUM AND ERBIUM TETR A APPLICATIONS OF DSCPCF MODEL IN RARE EARTH COMPLEXES MONO PIPERIDINE COMPLEXES thenoyltrifluoroacetone

Influence of Synthesis Parameters on Luminescence of thenoyltrifluoroacetone Europium Powders

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Journal of Materials Science and Chemical Engineering 2018年第8期6卷 1-8页

作者： Dulce Y. Medina-Velazquez Manuel Barraza Miguel Barron Isaias Hileio Victor Colin División de Ciencias Básicas e Ingeniería Universidad Autónoma Metropolitana-Azcapotzalco Reynosa Mexico

In the last years the development of new luminescent materials was grow highly in order to find efficient materials with low cost of processing. In this way the organic luminescent materials have special attention because its special characteristics, like antenna effect, low temperature processing, possibility to make translation to polymeric and flexible compounds. In this work luminescent powders of TTA:Eu3+ by sol-gel method were synthesized in order to define the synthesis parameters of the highest luminescence. The temperatures of heat treatment were 80°C, 100°C, 200°C and the concentration of Europium where 10%, 20%, 30% and 40% mol (TTA-10Eu, TTA-20Eu, TTA-30Eu, and TTA-40Eu). Fourier Transform Infrared Rays analysis (FTIR) and emission luminescence measures, the best conditions of synthesis were obtained at 40% mol of Europium and 80°C of heat treatment, at 272 nm of excitation. All the samples present the corresponded Eu3+ ion transitions the 5D0 → 7FJ (J = 0, 1, and 2). This confirms the great possibilities of these materials for optoelectronic applications.

关键词： Luminescence Europium Organic Compounds thenoyltrifluoroacetone Antenna Effect

Solvent extraction and stripping of lithium ion from aqueous solution and its application to seawater

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Rare Metals 2016年第12期35卷 948-953页

作者： Gregorius Rionugroho Harvianto Seok-Hyeon Kim Chang-Sik Ju Department of Chemical Engineering Pukyong National University

For the development of lithium ion recovery process from seawater, a series of experimental researches were performed. Solvent extraction of lithium ion from aqueous solution using kerosene as solvent was proposed. Lithium ion is effectively extracted by thenoyltrifluoroace- tone-trioctylphosphine oxide （TTA-TOPO） in kerosene within 80 min. Extraction efficiency is severely influenced by stoichiometric parameters. Among the stoichiometric parameters, volume ratio of aqueous （A） to extraction （E） solution is the most influential parameter. After extrac- tion, lithium ion could be easily stripped from the extraction solution by acidic solutions. Stripping efficiency decreases with pH of acidic solutions, and the kind of acid does not affect the stripping efficiency. Extraction efficiency main- tains at more than 93 % even when the extraction solution is recycled three times. 65 % of lithium ion can be extracted from seawater by this solvent extraction process when magnesium ion is precipitated by NHaOH prior to solvent extraction process. Other metallic ions in seawater decrease the extraction efficiency of lithium ion.

关键词： Lithium thenoyltrifluoroacetone Trioctylphosphine oxide Solvent extraction Stripping Recycling

Crystal structure and fluorescence spectrum of the complex [Eu(Ⅲ)(TTA)_3(phen)]

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Chinese Journal of Chemistry 1999年第6期17卷 637-643,5页

作者：胡茂林黄振炎程亚倩王舜林娟娟胡燚徐端钧徐元植 Department of Chemistry Wenzhou Teachers College Wenzhou Zhejiang 325003 Department of Chemistry Zhejiang University Hangzhou Zhejiang 310027 China

The title complex Eu(Ⅲ)(TTA)3(phen) (where TTA= thenoyltrifluoroacetone monoanion; phen = 1,10-phenanthroline) has been synthesized in mixed solvents of acetone and ethanol (1:1 volume ratio) and its crystal structure has been determined by X-ray diffraction. The complex crystals are triclinic, space group P1(#2) with cell dimensions of a = 1.3241 (2) nm, 6 = 1.5278(4) nm, c = 0.9755(3) nm, α = 92.49 (2)°, β=102.57(2)°, γ = 91.62(2)°, V=1.9268(8) nm3, Z = 2, μ(Mo Kα) = 18.77 cm-1, Dx = 1.720 g/cm3. The coordination geometry of Eu atom is a distorted square antiprism, and the encapsulated structure that can meet the structural requirement of the typical europium luminescent sensor. The fluorescence spectrum suggests that the complex is a strong photoluminescent material.

关键词： Eu(Ⅲ) complex thenoyltrifluoroacetone crystal structure fluorescence spectnun

Fluorescence Enhancem ent by Gadoliniu m ( Ⅲ) for Com plex of Europiu m ( Ⅲ) with T T Aand T S Aand its Analytical Application

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Rare Metals 1999年第3期18卷 209-216页

作者：赵保卫杨武高锦章莫尊理张煊邓启良侯经国 DepartmentofChemistry

A highly sensitive fluorescence system of the europium gadolinium thenoyltrifluoroacetone tri(salicyloylaminoethyl)amine cetylpyridium bromide polyvinyl alcohol was established and the luminescence mechanism was studied. The excitation and emission wavelengths were 362.5 nm and 613.1 nm respectively. Optimum concentrations of gadolinium, thenoyltrifluoroacetone (TTA), and tri(salicyloylaminoethyl) amine (TSA) were found at room temperature. The effects of surfactants cetylpyridium bromide (CPB) and polyvinyl alcohol (PVA) were also described. The fluorescence intensity varies linearly with the concentration of europium (Ⅲ) in the range 5.00×10 -11 ～6.00×10 -8 mol/L and 1.00×10 -7 ～9.21×10 -7 mol/L. The detection limit is down to 9.02×10 -12 mol/L. The standard addition method was used for the determination of europium in high purity yttrium oxide with satisfactory results.

关键词： Europium Gadolinium thenoyltrifluoroacetone Tri(salicyloylaminoethyl)amine Co luminescence