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Synthesis and Photoluminescence Properties of rare earth complexes with 3-Allyl-2, 4-Pentanedione

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Journal of rare earths 2004年第2期22卷 201-205页

作者：邹应萍谭松庭肖尊宏王霞瑜 Institute of Polymer Material Science Xiangtan University Xiangtan 411105 China

In order to combine the merits of rare earth organic complexes with excellent material performances of polymers, a polymerizable chelating agent, 3-allyl-2, 4-pentane dione (APD), was synthesized by phase transfer catalysis and its rare earth complexes were prepared. The compounds were characterized by EA, IR and (()~1H NMR.) Their UV spectra and fluorescence spectra were investigated. The effects of allyl on the luminescence properties of the complexes were studied. The results show that the sensitization of APD is changed by allyl in comparison with that of acetyl acetone (acac), and it becomes an ideal novel ligand of Eu. In addition, intramolecular energy transfer mechanism in the luminescence process in the complexes was also discussed in detail.

关键词： optics rare earth complexes synthsis photoluminescence energy transfer rare earths

Synthesis and luminescent properties of novel pyrazolone rare earth complexes

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Journal of rare earths 2011年第1期29卷 15-19页

作者：保积庆汤春花唐瑞仁 Resources and Environment Technical Research Institute Jiaxing University School of Chemistry and Chemical Engineering Central South University

A novel pyrazolone pyridine-containing ligand, 2,6-bis（1-phenyl-4-ethoxycarbonyl-5-pyrazolone-3-yl）pyridine （H2L） was designed and synthesized from pyridine-2,6-dicarboxylic acid （1）, and its Eu（III） and Tb（III） complexes were prepared. The ligand and complexes were characterized in detail based on FT-IR spectra, ^1H NMR, elemental analysis and thermal analysis, and the formula of Ln2L3·4H2O （Ln=Eu or Tb） of rare earth complexes was confirmed. The UV-vis absorption spectra and photoluminescence properties of the complexes were investigated, which showed that the Eu（III） and Tb（III） ions could be sensitized efficiently by the ligand （H2L） and emit the photolumi- nescence with high intensity, narrow half-peak width, and monochromic light. The results indicated that the complexes showed potential as excellent luminescent materials.

关键词： pyrazolonc ligand pyridine-2,6-dicarboxylic acid synthesis rare earth complexes luminescent properties

Interaction between Ternary rare earth complexes of Cinnamic Acid and Phenanthroline with DNA by Spectroscopy

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Journal of rare earths 2005年第2期23卷 162-166页

作者：郭东方叶炎曾正志 College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China

The interaction of ternary complexes [RE(phen)(cin)_3(H_2O)](RE= Nd (III),Ce(III),Eu(III))with calf thymus DNA was investigated by electronic absorption spectroscopy, ethidium bromide(EB)-DNA quenching fluorescent spectra and resonance light scattering. All experimental results indicate that the three complexes bind to DNA by the electrostatic mode and the intercalative mode. It is predicted that these complexes show high anticancer activity or other biologic activity.

关键词： inorganic chemistry electrostatic and intercalative mode EB-DNA quenching fluorescent spectroscopy absorption spectroscopy resonance light scattering rare earth complexes

Synthesis, Characterization and Vulcanizing Properties of rare earth complexes with 2-Mercaptobenthiazole

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Journal of rare earths 2002年第5期20卷 395-399页

作者：张启交韦凤仙章伟光黄庙由罗远芳 Department of Chemistry South China Normal University Guangzhou 510631 China Department of Polymer Material and Science South China University of Technology Guangzhou 510641 China

Eight complexes of rare earth with 2 mercaptobenthiazole, RELCl 2·RE(OH) 3· x H 2O (L=2 mercaptobenthiazole, RE= La～Gd, Y, except for Pm, x =0, 2～4), were synthesized in unhydrous ethanol and characterized by elemental analyses, IR spectra and thermal analyses. The results show that the ligand is coordinated to the RE ion through both the exocyclic sulfur and the thiazole nitrogen. The vulcanizing properties of the La complex as accelerator were studied in the traditional tire rubber, which indicate that the cross linked rubber accelerated by the rare earth complex has good physical and dynamic mechanical properties by comparison.

关键词： rare earths 2 mercaptobenthiazole rare earth complexes vulcanizing properties physical mechanical properties

Synthesis, luminescence properties and energy transfer of binary and ternary rare earth complexes with aromatic acids and 1,10-phenanthroline

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Chinese Journal of Chemistry 1997年第3期15卷 242-249页

作者： Yan, B Zhang, HJ Ni, JZ Key Laboratory of rare earth Chemistry and Physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China

A series of binary and ternary rare earth (Gd, Eu, Tb) complexes with ortho hydroxyl benzoic acid, pam aminobenzoic acid, nicotinic acid and 1,10-phenanthroline were synthesized. Phosphorescence spectra and lifetimes of Gd complexes were measured and the lowest triplet state energies of gadolinium binary complexes end the intramolecular energy transfer efficiencies were determined. The luminescence properties and energy transfer process of Eu3+ and Tb3+ complexes were discussed.

关键词： luminescence energy transfer rare earth complexes energy match

Preparation and Characterization of Polymer－Supported rare earth complexes

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Chemical Research in Chinese Universities 1995年第4期11卷 342-353页

作者： YU Guang-qian and LI Yu-liang(Changchun Institute of Applied Chemistry,Academia Sinica,Changchun,130022)Ll Xiao-li(Department of Chemistry,Changchun Normal College, College, Changchun,130032) ACAD SINICA CHANGCHUN INST APPL CHEMCHANGCHUN 130022PEOPLES R CHINA CHANGCHUN NORMAL COLL DEPT CHEMCHANGCHUN 130032PEOPLES R CHINA

he polymers containing different ligand groups of atoms(mainly O,N,and S)and their rare earth complexes were prepared,characterized and classified based on the type of metal-ligand bonding. The catalytic activities of the complexes are briefly *** polymer- supported rare earth complexes shwed much greater activities than the correspond- ing complexes with a low molecular weight.

关键词： rare earth complexes Polymer-support Butadiene polymerization Catalytic activities.

The Luminescence Properties and Intramolecular Energy Transfer of rare earth complexes with Aromatic Carboxylic Acids

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Chemical Research in Chinese Universities 1998年第3期14卷 23-27页

作者： YAN Bing ZHANG Hong-jie NI Jia-zuan Key Laboratory of rare earth Chemistry and Physics Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022

The triplet state energies of para aminobenzoic acid and nicotinic acid were determined by means of low temperature phosphorescence spectrometry. The energy matches between them and the resonant emitting energy levels of Eu 3+ , Tb 3+ , Sm 3+ , Dy 3+ were studied. The intramolecular energy transfer processes from the two aromatic carboxylic acid ligands to rare earth ions were also discussed on the basis of the measurement results of luminescence intensities, lifetimes and quantum efficiencies.

关键词： Luminescence properties Intramolecular energy transfer rare earth complexes

Synthesis and Properties of rare earth complexes with 3-Ferrocenyl-5-Phenyl-Pyrazoline-1-Dithiocarbamate

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Journal of rare earths 1993年第2期11卷 85-88页

作者：鲁文杰王星堂韩晓军陈敏 Department of Chemistry Xinjiang UniversityWulumuqi 830046China

Sodium 3-ferrocenyl-5-phenyl-pyrazoline-1-dithiocarbamate (FPPD) reacts with anhydrous rare earth chlorides in absolute ethanol to give 14 new *** results of elemental analysis show that the compositions of the complexes are RE(FPPD)_3·nH_2O(RE=La,Pr～Lu and Y;n=3).The ligand and its complexes have been characterized by infrared spectroscopy,UV-visible absorption spectroscopy,~1H-NMR spectra,thermal analysis and molar conductivity measurement.

关键词： rare earth complexes Organometailic ligand Dithiocarbamate Ferrocenyl group

Synthesis, Characterization of α-Oxopentanedioic Acid-Isonicotinoyl (Hydrazone) rare earth-complexes and Relaxivity of Gd-complex

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Journal of rare earths 2004年第3期22卷 327-330页

作者：杨正银杨汝栋 State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China

Oxopentanedioic acid isonicotinoyl hydrazone (H_2L) and its five rare earth complexes were synthesized with a view to further investigating MRI activities of the polycarboxylic Schiff base complexes. The complexes were characterized on the basis of elemental analyses, IR, UV, (()~1H) NMR spectra and thermal analyses. The general formula of the complexes is [Ln(HL)(H_2O)_2]Cl_2·H_2O (where Ln(Ⅲ)=La, Pr, Nd, Eu and Gd). In addition, the relaxivity ( R _1) of the Gd-complex was determined by INVREC Au program.

关键词： inorgonic chemistry MRI contrast agent Relaxivity rare earth complexes