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Separation and Detection of Lanthanide Ions with Nitrilotri (methylenephosphonic) Acid as Complexing Agent and Eluent by IPC
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作者 李重阳 高锦章 +2 位作者 杨武 李波阳 刘慧涛 《Rare Metals》 SCIE EI CAS CSCD 2000年第2期136-140,131,共5页
A mixture containing eleven lanthanide ions was separated and detected on an anion exchange co lumn by ion chromatography with indirect photometry detection (IPC).An aqueous solution of 1.5×10 -2 mol/L ni... A mixture containing eleven lanthanide ions was separated and detected on an anion exchange co lumn by ion chromatography with indirect photometry detection (IPC).An aqueous solution of 1.5×10 -2 mol/L nitrilotri(methylenephosphonic) acid and 2.5×10 -3 mol/L tiron was used as the eluent in which the former served as complexing agent and eluent,the latter played as color reagent and eluent.The effects of acidity,concentration and composition of eluent on the retention behavior of the analytes and detection sensitivity are discussed. 展开更多
关键词 SEPARATION DETECTION lanthanide ions Nitrilotri(methylenephosphonic) acid Ion chromatography with IPC
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Zigzag-Ladder Structure Coordination Polymer Containing Supramolecular Capsules of Dinuclear Lanthanide Ions by p-Sulfonatothiacalix[4]arene
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作者 郭倩玲 邓运富 屈一新 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第4期474-481,共8页
Two isomorphous 2D zigzag-ladder structure coordination polymers containing coordination supramolecular capsules are reported,which are built by trivalent lanthanide ions,pyridine N-oxide(PNO) and p-sulfonatothiacal... Two isomorphous 2D zigzag-ladder structure coordination polymers containing coordination supramolecular capsules are reported,which are built by trivalent lanthanide ions,pyridine N-oxide(PNO) and p-sulfonatothiacalix[4]arene(H4TCAS4-):[Ln2(PNO)2(H2O)10?(H2TCAS)2].[Ln2(H2TCAS)2(H2O)6(MeOH)2].2MeOH.12H2O(Ln = La,1;Nd,2).Crystal data for complex 1:C31H51La2NO33S8,Mr = 1500.03,triclinic system,P 1 space group,with a = 11.732(2),b = 15.007(3),c = 15.262(3),α = 78.05(3),β = 80.77(3),γ = 83.89(3)°,Z = 2,V = 2587.3(9)3,Dc = 1.925 g/cm3,μ = 2.051 mm-1,F(000) = 1500,the final R = 0.0300 and wR = 0.0823;and those for complex 2:C31H51Nd2NO33S8,Mr = 1510.69,triclinic system,P1 space group,with a = 11.719(2),b = 14.941(3),c = 15.157(3),α = 78.03(3),β = 80.84(3),γ = 83.95(3)°,Z = 2,V = 2555.9(9)3,Dc = 1.963 g/cm3,μ = 2.436 mm-1,F(000) = 1512,the final R = 0.0493 and wR = 0.1267.There are two coordination environments of lanthanide ions.One is bridged by two PNO molecules forming a dimeric Ln ion in the O,O’-μ2 mode.The dinuclear ions are shrouded by two H2TCAS6-ions through coordination interactions and hydrogen bonds.The other coordination mode of Ln ions is a zigzag 1D chain linked by up-down H2TCAS6-ions.By the coordination capsules,the complexes form 2D zigzag-ladder structure coordination polymers. 展开更多
关键词 arene trivalent lanthanide ions supramolecular capsule zigzag-ladder structure crystal structure
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FOURIER TRANSFORM INFRARED SPECTROSCOPIC STUDY OF EFFECT OF LANTHANIDE IONS ON PHOSPHOLIPID MULTIBILAYERS
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作者 Wei WANG Lai Ming LI +1 位作者 Zhi Li LI Shi Quan XI 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第10期829-832,共4页
The molecular interactions between Nd^(3+), Gd^(3+)and Yb^(3+) and DPPC in multibilayer have been studied by Fourier transform infrared spectroscopy. The results show that incorporations of the lanthanide ions conside... The molecular interactions between Nd^(3+), Gd^(3+)and Yb^(3+) and DPPC in multibilayer have been studied by Fourier transform infrared spectroscopy. The results show that incorporations of the lanthanide ions considerably shift the gel to liquid-crystal phase transition to higher temperatures. The incorporations of Gd^(3+) and Yb^(3+) obviously reduce the cooperations of the transition. The phosphate region of the spectra indicates that the Ln^(3+) binding to DPPC forms DPPC-Ln^(3+)complex and the Lna^(3+)binding is not dependent on the phase state of DPPC. The C-H stretching region of the spectra suggests that the incorporation of Ln^(3+)increases the conformational order of DPPC both in gel and in liquid-crystal phase as a result of the reduction of gauche rotamers. 展开更多
关键词 DPPC ND FOURIER TRANSFORM INFRARED SPECTROSCOPIC STUDY OF EFFECT OF lanthanide ions ON PHOSPHOLIPID MULTIBILAYERS
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Effects of Lanthanide Ions on Electrooxidation of Methanol
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作者 WANG Hai-tao YIN Yu-chun GAO Shu-juan 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2008年第5期632-634,共3页
Four kinds of lanthanide ions(Sm^3+,Yb^3+,Eu^3+,La^3+)as an additive were added into the aqueous solution containing methanol,respectively,and their effects on methanol elecotrooxidation in aqueous solutions wer... Four kinds of lanthanide ions(Sm^3+,Yb^3+,Eu^3+,La^3+)as an additive were added into the aqueous solution containing methanol,respectively,and their effects on methanol elecotrooxidation in aqueous solutions were studied with cyclic voltammetry.The results show that the four kinds of ions have promotion action upon the electrooxidation of methanol to different degrees.The best additive,Sm^3+,can increase the anodic oxidation current of methanol by 80%and the peak potential shifted negatively about 50 mV.The promotion effects of the lanthanide ions were considered to be related to the extranuclear electron distribution of these ions and their adsorption on the Pt electrode surface. 展开更多
关键词 METHANOL ELECTROOXIDATION lanthanide ion
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Multicolor emission from lanthanide ions doped lead-free Cs_(3)Sb_(2)Cl_(9) perovskite nanocrystals
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作者 He Shao Lifang Li +5 位作者 Xiufeng Wu Lin Xu Biao Dong Donglei Zhou Xue Bai Hongwei Song 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第5期940-946,I0005,共8页
The toxicity of lead ions has become the severe challenge for the all-inorganic lead halide p erovskite materials,although some works have rep orted the lead-free perovskite nanocrystals(NCs),the photoluminescence qua... The toxicity of lead ions has become the severe challenge for the all-inorganic lead halide p erovskite materials,although some works have rep orted the lead-free perovskite nanocrystals(NCs),the photoluminescence quantum yield(PLQY)of these materials is still unsatisfactory.Meanwhile,because the halogen ions can be easily exchanged,the controllable multicolor emission in perovskite NCs is difficult to realize in current reports.In this work,we introduced lanthanide ions into lead-free Cs_(3)Sb_(2)Cl_(9) perovskite NCs.Benefitting from the energy transfer between Cs_(3)Sb_(2)Cl_(9) perovskite NC host and lanthanide ions,the multicolor emission was realized.Based on controlling the doping concentration of Tb^(3+)and Eu^(3+)ions,the white light emission under UV excitation would be turned easily in the Tb^(3+)/Eu^(3+)codoped NCs.In addition,efficient energy transfer from perovskite NCs to Tb^(3+)or Eu^(3+)ions is beneficial to improving the optical properties of lead-free perovskite NCs,resulting in maximum PLQYs of red,green and white light emission of 22.6%,19.7%and 28.5%,respectively.Finally,a white light emitting device(WLED)was fabricated with a power efficiency of 18.5 lm/W,which presents the Commission Internationale de l'Eclairage(CIE)of(0.33,0.35). 展开更多
关键词 Perovskite nanocrystals Lead free lanthanide ions Energy transfer White light emitting device Rare earths
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Sorption of lanthanide ions on biochar composites 被引量:6
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作者 Dorota Kotodyniska Justyna Bak +1 位作者 Malwina Majdariska Dominika Fila 《Journal of Rare Earths》 SCIE EI CAS CSCD 2018年第11期1212-1220,共9页
Sorption of lanthanum(Ⅲ), cerium(Ⅲ and neodymium(Ⅲ) ions from the aqueous solutions of mixtures through adsorption on the biochar composites was investigated as a function of sorbent mass, pH, phase contact ti... Sorption of lanthanum(Ⅲ), cerium(Ⅲ and neodymium(Ⅲ) ions from the aqueous solutions of mixtures through adsorption on the biochar composites was investigated as a function of sorbent mass, pH, phase contact time and initial concentration of solutions at 295 K. The maximum removal of lanthanide ions takes place under the following conditions: 0.1 g of sorbent mass, pH 4 and 360 rain contact time for all studied initial concentrations of solutions. Kinetics of La(Ⅲ), Ce(Ⅲ) and Nd(Ⅲ) ions sorption proceeded by a fast initial uptake reached equilibrium. This process was modelled by means of the pseudo first order, pseudo second order, intraparticle diffusion and Elovich models. The desorption of three lanthahide ions by nitric, hydrochloric and sulfuric acids at a concentration of 1 mol/L from biochar composites was also studied. In order to investigate the sorption mechanism FFIR, XRD and XPS analyses were performed after sorption of ions from the mixture. 展开更多
关键词 lanthanide ions Biochar composites Sorption mechanism Zerovalent iron Rare earths
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Mechanism of magnetic field-modulated luminescence from lanthanide ions in inorganic crystal:a review 被引量:5
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作者 Shan-Ling Zuo Ping Chen Cao-Feng Pan 《Rare Metals》 SCIE EI CAS CSCD 2020年第10期1113-1126,共14页
The luminescence from lanthanide ions has potential applications in light emitting diodes,biomedical,solar cells,sensors,display,etc.However,the luminescence is suffered from the various problems,such as low luminesce... The luminescence from lanthanide ions has potential applications in light emitting diodes,biomedical,solar cells,sensors,display,etc.However,the luminescence is suffered from the various problems,such as low luminescence efficiency and inharmonious wavelength for energy transfer.Magnetic field is an efficient method to modulate the wavelength and intensity of luminescence from lanthanide ions.Magnetic field redistributes the populated electrons in the excited states to tune the wavelength of lanthanide ions by Zeeman effect,mixing effect,and quantum confinement effect.Magnetic field enhances or suppresses the luminescence intensity by the administration of cross-relaxation,energy transfer,and Boltzmann population.In this review,we first introduce the various phenomena and mechanisms of magnetic field modulated downshift luminescence from lanthanide ions,including Zeeman effect,cross-relaxation,crystal structure,absorption,quantum confinement effect,and magneticoptical hysteresis.Then,we explain the regulation of upconversion luminescence by magnetic field,containing energy transfer and mixing effect.Finally,different options regarding how to understand the mechanism of magnetic field-modulated luminescence from lanthanide ions in the future are outlined. 展开更多
关键词 Magnetic field lanthanide ions LUMINESCENCE Microscopic mechanism
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Crystal-field analyses for trivalent lanthanide ions in LiYF_4
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作者 程军 闻军 +2 位作者 陈永虎 尹民 段昌奎 《Journal of Rare Earths》 SCIE EI CAS CSCD 2016年第10期1048-1052,共5页
Based on the completely parametric crystal-field model, the energy level parameters, including free-ion parameters and crystal-field parameters, obtained by fitting the experimental energy level data sets of Ln^(3+... Based on the completely parametric crystal-field model, the energy level parameters, including free-ion parameters and crystal-field parameters, obtained by fitting the experimental energy level data sets of Ln^(3+) in LiYF_4 were systematically analyzed. The results revealed that the regular variation trends of the major parameters at relatively low site symmetry still existed. The g factors of ground states were calculated using the parameters obtained from least-squares fitting. The results for Ce^(3+), Nd^(3+), Sm^(3+), Dy^(3+) and Yb^(3+) were in good agreement with experiment, while those of Er^(3+) deviated from experiment dramatically. Further study showed that the g factors depended strongly on B_4~6, and a slightly different B_4~6 value of -580cm^(-1) led to g factors agreeing well with the experimental values. 展开更多
关键词 crystal-field interactions LiYF4 lanthanide ions variation trends g factors rare earths
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Prolonging charge-separation states by doping lanthanide-ions into {001}/{101} facets-coexposed TiO_(2) nanosheets for enhancing photocatalytic H_(2) evolution 被引量:11
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作者 Yongan Zhu Zhenyi Zhang +2 位作者 Na Lu Ruinian Hua Bin Dong 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第3期413-423,共11页
Ultrathin TiO_(2)nanosheets with coexposed{001}/{101}facets have attracted considerable attention because of their high photocatalytic activity.However,the charge-separated states in the TiO_(2)nanosheets must be exte... Ultrathin TiO_(2)nanosheets with coexposed{001}/{101}facets have attracted considerable attention because of their high photocatalytic activity.However,the charge-separated states in the TiO_(2)nanosheets must be extended to further enhance their photocatalytic activity for H_(2)evolution.Herein,we present a successful attempt to selectively dope lanthanide ions into the{101}facets of ultrathin TiO_(2)nanosheets with coexposed{001}/{101}facets through a facile one-step solvothermal method.The lanthanide doping slightly extended the light-harvesting region and markedly improved the charge-separated states of the TiO_(2)nanosheets as evidenced by UV-vis absorption and steady-state/transient photoluminescence spectra.Upon simulated sunlight irradiation,we observed a 4.2-fold enhancement in the photocatalytic H_(2)evolution activity of optimal Yb^(3+)-doped TiO_(2)nanosheets compared to that of their undoped counterparts.Furthermore,when Pt nanoparticles were used as cocatalysts to reduce the H_(2)overpotential in this system,the photocatalytic activity enhancement factor increased to 8.5.By combining these results with those of control experiments,we confirmed that the extended charge-separated states play the main role in the enhancement of the photocatalytic H_(2)evolution activity of lanthanide-doped TiO_(2)nanosheets with coexposed{001}/{101}facets. 展开更多
关键词 Photocatalysis H_(2)evolution lanthanide ion doping TiO_(2) Coexposed facets {001}facets NANOSHEETS
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A study on hydrolytic polymerization of lanthanide ions
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作者 LUO,Qin-Hui SHEN,Meng-Chang BAO,Xin-Lu DING,Yi DAI,An-Bang (An-Pang TAI) Coordination Chemistry Research Institute,Nanjing University,Nanjing,210008 《Chinese Journal of Chemistry》 SCIE CAS CSCD 1990年第5期412-422,共0页
Experimental data of hydrolytic polymerization of lanthanide ions in aqueous solution were treated by graphic method,computer fitting and pq analysis,species present were ascertained and hydrolysis constants obtained.... Experimental data of hydrolytic polymerization of lanthanide ions in aqueous solution were treated by graphic method,computer fitting and pq analysis,species present were ascertained and hydrolysis constants obtained.Ln(OH)^(2+)and Ln_2(OH)_2^(4+)predominated in the species of all hydroly- sis products.When the first and the second hydrolysis constants were plotted against radii and ef- fective nuclear charge of lanthanide ions,the curves obtained conformed with the“three-division groups”rule.Correlation between hydrolysis constants of Ln_2(OH)_2^(4+)and other hydrolysis constants is linear. Using the above empirical correlations we calculated hydrolysis constants of all lanthanide ions and obtained satisfactory results which showed good regularity for hydrolysis of lanthanide ions and thus systematized all data of the reaction. 展开更多
关键词 A study on hydrolytic polymerization of lanthanide ions LA
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Probing Lanthanide Ions Binding on tRNA^(Phe) by ~1H NMR
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作者 涂华民 杨燕生 +3 位作者 孟建新 龚孟濂 吴亦洁 张洪杰 《Journal of Rare Earths》 SCIE EI CAS CSCD 1998年第3期2-7,共6页
The structure of phenylalanine transfer ribonucleic acid(tRNA Phe ) in solution was explored by 1 H NMR spectroscopy to evaluate the effect of lanthanide ion on the structural and conformational change. It w... The structure of phenylalanine transfer ribonucleic acid(tRNA Phe ) in solution was explored by 1 H NMR spectroscopy to evaluate the effect of lanthanide ion on the structural and conformational change. It was found that La 3+ ions possess specific effects on the imino proton region of the 1 H NMR spectra for yeast tRNA Phe . The dependence of the imino proton spectra of yeast tRNA Phe as a function of La 3+ concentration was examined, and the results suggest that the tertiary base pair G 15 ·C 48 , which is located in the terminal in the augmented dihydrouridine helix(D helix), was markedly affected by La 3+ (shifted to downfield by as much as 0 35). Base pair U 8·A 14 in yeast tRNA Phe , which are stacked on G 15 ·C 48 , was also affected by added La 3+ when 1~2 Mg 2+ were also present. Another imino proton that may be affected by La 3+ in yeast tRNA Phe is that of the tertiary base pair G 19 ·C 56 . The assignment of this resonance in yeast tRNA Phe is tentative since it is located in the region of highly overlapping resonances beween 12 6 and 12 2. This base pair helps to anchor the D loop to the TΨC loop. The binding of La 3+ caused conformational change of tRNA, which is responsible for shifts to upfield or downfield in 1 H NMR spectra. 展开更多
关键词 Rare earths lanthanide ion Transfer ribonucleic acid Nuclear magnetic resonance
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A Raman Study of the Effect of Trivalent Lanthanide Ions on the Conformational Disorder in Acyl Chains of Phospholipid Bilayers
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作者 YUAN Chun-bo ZHAO Da-qing and NI Jia-zuan(Laboratory of Rare Earth Chemistry and Physics,Changchun Institute of AppliedChemistry , Academia Sinica, Cmhangchun,130022)ZHAO Bing(Key Laboratory of Molecular Spectrum and Structure,Jilin University, Changchun, 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1994年第4期377-380,共4页
ARamanStudyoftheEffectofTrivalentLanthanideIonsontheConformationalDisorderinAcylChainsofPhospholipidBilayers... ARamanStudyoftheEffectofTrivalentLanthanideIonsontheConformationalDisorderinAcylChainsofPhospholipidBilayersYUANChun-bo,ZHAOD... 展开更多
关键词 DIPALMITOYLPHOSPHATIDYLCHOLINE lanthanide ion Raman spectroscopy
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Relationship between Crystal Structure and Luminescence Properties of (Y_(0.96-x)Ln_xCe_(0.04))_3Al_5O_(12) (Ln=Gd, La, Lu) Phosphors 被引量:13
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作者 孔丽 甘树才 +1 位作者 洪广言 张吉林 《Journal of Rare Earths》 SCIE EI CAS CSCD 2007年第6期692-696,共5页
The doping effects of La^3+, Gd^3+ and Lu^3+ on the crystal structure and luminescence properties of (Yo96-x LnxCe0.04)3Al5O12(Ln = Gd, La, Lu) phosphors were studied. The X-ray diffraction patterns presented t... The doping effects of La^3+, Gd^3+ and Lu^3+ on the crystal structure and luminescence properties of (Yo96-x LnxCe0.04)3Al5O12(Ln = Gd, La, Lu) phosphors were studied. The X-ray diffraction patterns presented that with the inerease of the doping concentrations of La^3+ and Gd^3+ ions, the d-value of (Y0.96-xLnxCe0.04)3Al5O12 (Ln = Gd, La) inereased and the larger the doping ion, the stronger the effect would be. The doping amount causing phase transition in (Y0.96-xLnxCe0.04)3Al5O12 decreased with the inerease of the ionic radii of the doping lanthanide ions (La^3+: 0.106 nm, Gd^3+: 0. 094 nm, Lu^3+ : 0.083 nm). The bigger doping ion of Gd^3+ made the emission of (Y0.96-xGdxCe0.04)3Al5O12 move to red spectral region, but the smaller one of Lu^3+ made it blue. 展开更多
关键词 LUMINESCENCE YAG: Ce doping of lanthanide ions rare earths
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FT-Raman Spectroscopic Studies on the Interaction of Metal Ions With Sphingomyelin Bilayer 被引量:1
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作者 ZHAO Bing (Key Laboratory of Molecular Spectra and Structure,Jilin University,Changchun,130023)YUAN Chun-bo,ZHAO Da-qing and NI Jia-zuan(Laboratory of Rare Earth Chemistry and Physics,Changchun Institute oj Applied Chemistry,Academia Sinica,Changchun,130022)HUANG Fen (Institute oj Biophysics,Academia Sinica,Beijing,100080) 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1995年第2期117-121,共5页
The interaction of trivalent lanthanide ions and divalent calcium ions with sph-'ngomyelm bilayer has been studied by FT-Raman spectroscopy.The results showed that the bonding of metal ions to the phosphate group ... The interaction of trivalent lanthanide ions and divalent calcium ions with sph-'ngomyelm bilayer has been studied by FT-Raman spectroscopy.The results showed that the bonding of metal ions to the phosphate group of sphingomyelin bi-iayer,either La3+or Ca2+did not change the conformation of the choline group,that is,O-C-C-N+is still in its gauche conformation.The presence of metal ions changed the states of the interfacial region from liquid-like to amorphous state and even to crystalline.They increased the fluidity of acyl chains of sphingomyelin bilaver and made them packed disorderly. 展开更多
关键词 Vibrational spectra lanthanide ions Sphingomyelin bilayer
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Controlled Synthesis and Optical Properties of Lanthanide-doped Na3ZrF7 Nanocrystals 被引量:3
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作者 付虎辉 刘永升 +1 位作者 江飞龙 洪茂椿 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第11期1737-1748,共12页
In this paper,we report for the first time the controlled synthesis of lanthanide ion(Ln3+)-doped tetragonal-phase Na3Zr F7nanocrystals(NCs)via a high-temperature co-precipitation approach.The as-synthesized Na3Zr F7N... In this paper,we report for the first time the controlled synthesis of lanthanide ion(Ln3+)-doped tetragonal-phase Na3Zr F7nanocrystals(NCs)via a high-temperature co-precipitation approach.The as-synthesized Na3Zr F7NCs are systematically studied by utilizing the XRD,TEM as well as high-resolution photoluminescence(PL)spectroscopy.The morphology and size for the as-synthesized Na3Zr F7NCs can be finely controlled by changing the experimental parameters such as the amount of precursor,solvent ratio,reaction temperature and time.By utilizing the red-emitting Eu3+ion as an efficient optical/structural probe,the successful hetero-valence doping of Ln3+activators in the lattices of Na3Zr F7NCs is well-established regardless of their different valences and radii between host Zr4+ion and Ln3+dopant.As a result,intense upconversion(UC)luminescence(UCL)ranging from UV to visible and to NIR spectral regions can be readily achieved after the doping of typical UCL couples of Yb3+/Er3+,Yb3+/Tm3+and Yb3+/Ho3+into the lattices of Na3Zr F7NCs when excited by using a 980-nm NIR diode laser. 展开更多
关键词 lanthanide ion Na3ZrF7 NANOCRYSTALS upconversion luminescence
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Syntheses,Structures and Properties of Lanthanide Coordination Polymers Constructed from Mixed Acid
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作者 孙长艳 吕琼 +3 位作者 张慧燕 李文军 常志东 郑向军 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第1期27-32,共6页
Two new coordination polymers,[Ln(oba)(ox)0.5(H2O)2]n(Ln = Ho(1),Eu(2);H2oba = 4,4?-oxybis(benzoic acid),H2ox = oxalic acid) have been synthesized under hydrothermal conditions.According to single-cryst... Two new coordination polymers,[Ln(oba)(ox)0.5(H2O)2]n(Ln = Ho(1),Eu(2);H2oba = 4,4?-oxybis(benzoic acid),H2ox = oxalic acid) have been synthesized under hydrothermal conditions.According to single-crystal X-ray diffraction analyses,complex 1 crystallizes in the monoclinic system,space group P21/c with a = 13.783(2),b =10.0120(15),c = 12.1974(18) ,β = 105.217(2)°,V = 1624.2(4) 3,C15H12O9Ho,Mr = 501.18,Z = 4,Dc = 2.050 g/cm3,F(000) = 964,μ = 4.919 mm-1,λ(MoKα) = 0.71073 ?,GOOF = 1.124,the final R = 0.0239 and wR = 0.0570 for 3310 independent reflections with Rint = 0.0298.Complexes 2 and 1 are isostructural.Oba and ox ligands bridge the Ln(III) ions into 2D layers with(4,4) topology,which are further interlinked into a 3D supramolecular network by hydrogen bonds.TG curves of the two complexes are studied to examine their thermal stabilities.Additionally,complex 2 shows red fluorescence in the solid state at room temperature. 展开更多
关键词 mixed acid lanthanide ion fluorescent property crystal structure
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Lanthanide Complexes with Acetylacetone and 5-(4-Nitrophenyl)-10,15,20-Triphcnylporphyrin Ligands
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作者 Dong Mei LI Guo Fa LIU +2 位作者 Tong Shun SHI Xiao Xun LIU Ji Qing XU(Department of Chemistry, Jilin University, Changchun, 130023) 《Chinese Chemical Letters》 SCIE CAS CSCD 1999年第2期183-184,共2页
Five lanthanide porphyrin complexes with 5- (4-nitrophenyl) -10, 15, 20-triphenylporphyrin and acetylacetonate ligands were synthesized and characterized by elemental analysis, IRspectra, Uv-visible spectra, IH NMR. T... Five lanthanide porphyrin complexes with 5- (4-nitrophenyl) -10, 15, 20-triphenylporphyrin and acetylacetonate ligands were synthesized and characterized by elemental analysis, IRspectra, Uv-visible spectra, IH NMR. The structures of the complexes were proposed. 展开更多
关键词 lanthanide ion PORPHYRIN COMPLEXES
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Effects of interlayer spacing and applied pressure on the lanthanide transport in MoS_(2)-based two-dimensional channels
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作者 Qinsi Xiong Chong Liu George C.Schatz 《International Journal of Smart and Nano Materials》 SCIE EI 2024年第3期579-592,共14页
Rare-earth elements(REEs)are critical to modern industry but difficult to separate due to their subtle and monotonic changes in physico-chemical properties.MoS2-based two-dimensional(2D)materials offer novel opportuni... Rare-earth elements(REEs)are critical to modern industry but difficult to separate due to their subtle and monotonic changes in physico-chemical properties.MoS2-based two-dimensional(2D)materials offer novel opportunities for enhancing REE separation,exhibiting a distinct volcano-shaped transport performance distribution that peaks at Sm3+.However,the specific contributions of thermodynamic and kinetic factors to ion transport within 2D confinement remain unclear.In this study,we conducted a series of non-equilibrium all-atom molecular dynamics(MD)simulations to explore the effects of interlayer spacing and external pressure on the transport of lanthanide ions inÅ-scale acetate functionalized 2D MoS2(MoS2-COOH)channels.We examined ion entry and permeation rates,water flux,dehydration,and binding modes.The simulation results reveal that the transport trends of lanthanide ions are jointly driven by the dehydration degree and the relative-binding strengths of ions to water and to the acetate within the 2D channels.Notably,the dehydration pattern of lanthanide ions during permeation is closely linked to kinetic factors.Overall,this study provides a detailed atomistic understanding of the mechanisms under-lying lanthanide ion transport under confinement.These findings point to the significant potential for tuning confinement and chemical functionalization withinÅ-scale channels for more efficient REE separation. 展开更多
关键词 MoS_(2) 2D channels lanthanide ions ion transport nanofluidics
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Exploring luminescence quenching on lanthanide-doped nanoparticles through changing the spatial distribution of sensitizer and activator
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作者 Jiwei Li Yao Xie +2 位作者 Renrui Sun Junxun Zhou Lining Sun 《Nano Research》 SCIE EI CSCD 2024年第5期4517-4524,共8页
Luminescence quench is common in overdoped upconversion nanoparticles.Various methods have been proposed to counteract the adverse effects of concentration quenching on luminescence,but in upconversion nanoparticles t... Luminescence quench is common in overdoped upconversion nanoparticles.Various methods have been proposed to counteract the adverse effects of concentration quenching on luminescence,but in upconversion nanoparticles that are highly doped with both sensitizers and activators,the factors that contribute to the diminishing of the emission cannot be summarized by a single cause.Herein,a core-shell design is used to spatially separate the sensitizer(Yb^(3+))and activator(Er^(3+))and to modulate the emission by changes in the distribution position as well as the concentration of the dopant ions in order to probe the factors affecting the luminescence.When the sensitizer ions are located in the core,the luminescence intensity of the nanoparticles is significantly weaker than that of the other distribution,which implies that the effect of sensitizer and activator on luminescence in the highly doped state has a different and more complex mechanism.The intensity of the emission is more affected by Yb^(3+)than Er^(3+),which includes not only the self-quenching of Yb^(3+),but also the dominance in the Yb^(3+)-Er^(3+)cross-relaxation.In this finding may provide new ideas for revealing the reasons for the diminished luminescence of highly doped upconversion nanoparticles and thus for enhancing luminescence. 展开更多
关键词 upconversion luminescence lanthanide ion core-shell nanoparticles concentration quenching CROSS-RELAXATION
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Lanthanide-doped near-infrared Ⅱ luminescent nanoprobes for bioapplications 被引量:9
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作者 Shaohua Yu Datao Tu +2 位作者 Wei Lian Jin Xu Xueyuan Chen 《Science China Materials》 SCIE EI CSCD 2019年第8期1071-1086,共16页
Luminescent biosensing in the second nearinfrared(NIR-II) region is featured with superior spatial resolution and high penetration depth by virtue of the suppressed scattering of long-wavelength photons. Hitherto, the... Luminescent biosensing in the second nearinfrared(NIR-II) region is featured with superior spatial resolution and high penetration depth by virtue of the suppressed scattering of long-wavelength photons. Hitherto, the reported NIR-II nanoprobes are mostly based on carbon nanotubes, organic fluorophores or semiconducting quantum dots. As an alternative, trivalent lanthanide ions(Ln3+) doped nanoparticles have been emerging as a novel class of promising nanoprobes. In this review, we highlight the recent progress in the design of highly efficient Ln3+-doped NIR-II nanoparticles towards their emerging bioapplications, with an emphasis on autofluorescence-free bioimaging, sensitive bioassay, and accurate temperature sensing. Moreover, some efforts and challenges towards this rapidly expanding field are envisioned. 展开更多
关键词 lanthanide ions NANOPROBE near-infrared Ⅱluminescence BIOIMAGING BIOASSAY temperature sensing
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