Fluorescence properties and application of doping complexes Eu1-xLx (TTA)3Phen as light conversion agents

Light conversion agents Eu1-x Lx (TTA)3 Phen (L denotes La3+ , Gd3+ , Y3+ ) complexes were prepared,and the influence of doping ions on fluorescence properties was investigated by elementary analysis, FTIR and fluorescent spectra. The results show that FTIR spectra of Eu1_x Lx (TTA)3 Phen complex system are identical with that of EuTTA3 Phen, which indicates that the complexes Eu1 xLx(TTA)3Phen are similar in structure to Eu (TTA)3Phen. For the above doping elements, co-fluorescence enhancement has the following order: Gd3+ ＞Y3+ ＞La3+ , and the optimum mole fractions of doping elements are 0.4, 0.2 and 0.5 respectively for Gd3+ , Y3+ ,La3+. Among all the complexes, Eu0.6 Gd0.4 (TTA)3 Phen complex has the strongest fluorescent intensity. Applying Eu0.6 Gd0.4 (TTA)3 Phen complex to plastic and printing inks, bright red fluorescence plastic and printing inks are obtained when the content of europium reaches 0.1% (mass fraction).     

Fluorescence properties and application of doping complexes Eu_(l-x)L_x(TTA)_3Phen as light conversion agents

1　INTRODUCTIONRecently ,theinvestigationonlightconversiona gentsmainlycoversorganicluminescentpigments ,in organicluminescentmaterialsandrareearthcomplex esluminescentmaterials[1 4 ] .Organicfluorescentpig mentsforlightconversionagentshavegoodlumines centintensity ,howevertheirstabilityispoor .Inor ganicluminescentmaterialshavegoodstability ,buttheirfluorescentintensityislowandhaspoorcompat ibilitywithresin .Rareearthcomplexesluminescentmaterialshavehighfluorescentintensityandgoodsta bil…     

铕/钬-苯甲酸-邻菲罗啉混合稀土配合物的合成与表征及荧光性质

在无水乙醇溶液中合成了铕/钬-苯甲酸(BA)-邻菲罗啉(Phen)混合稀土配合物,通过元素分析、红外光谱、摩尔电导等实验,确定配合物化学组成为RE(BA)3Phen(RE=Eu3+/Ho3+)。在310 nm紫外光激发下,研究了稀土配合物的荧光光谱。结果表明,铕和钬之间存在相互作用,钬对铕具有显著的敏化作用,这些混合配合物可以发出强度更高的红色荧光。当配合物中铕与钬物质的量之比为1∶1时,其荧光发射强度约为未引入钬时的2.2倍。     

Syntheses and applications of Eu（Ⅲ） complexes of 2-thienyltrifluoroacetonate, terephthalic acid and phenanthroline as light conversion agents

A series of europium(Ⅲ) complexes of 2-thienyltrifluoroacetonate (HTTA), terephthalic acid (TPA) and phenanthroline (Phen) were synthesized. The new complexes Eu(TPA)(TTA)Phen and Eu2(TPA)(TTA)4Phen2 were characterized by elemental analysis, IR spectrum, scanning electron microscope and thermal stability analysis. The results show that the thermal stability of the Eu( Ⅲ ) complexes increases in the following order: the mononuclear complex Eu(TTA)3Phen, the binuclear complex Eu2(TPA)(TTA)4Phen2, the chain polynuclear complex Eu(TPA)(TTA)Phen. And the formation of the binuclear/polynuclear structure of the new complexes appears to be responsible for the enhancement of their thermal and optical stability. In addition, The fluorescence excitation spectra of these new complexes show more broad excitation bands than that of the complex Eu(TTA)3Phen corresponding to their formation. The enhancement of Eu3 fluorescence in the new complexes can be observed by the addition of Gd3 . The bright red luminescent plastics can be obtained when the complex EuGd(TPA)(TTA)4Phen2 is added above 0.5% (mass fraction).     

三元配合物Tb(BA)3PIP的合成与发光性能研究

合成了一1,10-种邻菲罗啉(phen)衍生物2-苯基-咪唑并[4,5-f]-1,10-邻二氮杂菲(PIP),并以其作为第二配体,苯甲酸(HBA)为第一配体,合成了新的稀土Tb3 三元有机配合物Tb(BA)3PIP。采用元素分析、红外分析对合成的配体PIP及配合物的组成和结构进行了表征。结果表明,稀土Tb3 分别与苯甲酸配体的六个氧原子和第二配体PIP的两个氮原子配位。研究了其紫外光谱和荧光光谱。结果表明,在200~400nm区域内三元配合物对紫外光有强烈吸收,荧光光谱研究表明,在紫外光激发下,配合物中的配体可将吸收的能量传递给稀土离子,表现出较强的稀土Tb3 离子的特征发射,合成的第二配体对中心离子具有较好的敏化发光作用。     

铕、钇-苯甲酸-1,10-菲咯啉的合成及荧光性质研究

分别合成了稀土(铕、钇)与苯甲酸、1,10-菲咯啉配位的有机稀土羧酸配合物.通过元素分析和红外分析确定了配合物的组成与结构.通过荧光光谱与荧光寿命研究了它们的荧光性质.试验结果表明当钇掺入配合物后,能极大地增强铕的特征荧光,当铕钇的摩尔比为3:7时荧光强度最强,且此时的荧光寿命最长.经拟合后发现,在(铕、钇)-苯甲酸-1,10-菲咯啉配合物中,钇离子对铕荧光的敏化程度随钇含量的降低以指数形式衰减.     

掺杂Fe^3＋对钛酸锶氧敏薄膜电阻的影响

利用溶胶—凝胶的方法制备钛酸锶氧敏薄膜 ,掺杂不同含量的铁离子 ,测试在不同氧分压、温度下薄膜的电阻。所得到的结果和镁离子的掺杂一样 ,可以改善阻温特性 ,降低薄膜电阻。铁离子的摩尔分数在 2 0 %～ 2 5 %之间时 ,薄膜电阻在一定的温度区间内降低 ,表现出较好的氧敏特性 ,在该区间内阻温特性很好 ,电阻不受温度变化的影响     

铕-镧-柠檬酸-1,10-菲咯啉配合物荧光性能研究

分别合成了铕与柠檬酸配位的二元配合物，铕、柠檬酸、1，10－菲咯啉配位的三元配合物和掺杂不同量镧的多核三元配合物。经过元素分析、红外分析和热重差热分析等手段确定了配合物的组成与结构。通过荧光光谱及荧光寿命测试了其荧光性能，结果表明当铕与镧掺杂摩尔比为6：4时能得到荧光强度最强且荧光寿命最长的稀土配合。实验结果拟合表明，当铕镧摩尔比在1：9－5：5时，镧离了对铕荧光的敏化程度以指数形式衰减，当铕镧摩尔比在6：4－9：1时，镧离子对铕荧光的敏化程度以线性方式衰减。     

铕-镧-柠檬酸-1,10-菲咯啉配合物荧光性能研究

分别合成了铕与柠檬酸配位的二元配合物,铕、柠檬酸、1,10-菲咯啉配位的三元配合物和掺杂不同量镧的多核三元配合物.经过元素分析、红外分析和热重差热分析等手段确定了配合物的组成与结构.通过荧光光谱及荧光寿命测试了其荧光性能,结果表明当铕与镧掺杂摩尔比为6:4时能得到荧光强度最强且荧光寿命最长的稀土配合物.实验结果拟合表明,当铕镧摩尔比在1:9～5:5时,镧离子对铕荧光的敏化程度以指数形式衰减,当铕镧摩尔比在6:4～9:1时,镧离子对铕荧光的敏化程度以线性方式衰减.     

La1-xZnxMnO3和La2/3Sr_((1-x)/3)Znx/3MnO3的磁电输运特性

用固相反应方法制备La1-xZnxMnO3和La2/3Sr(1-x)/3Znx/3MnO3化合物。La1-xZnxMnO3在不同掺杂浓度x的研究表明:Zn2+在一定浓度范围内掺杂,具有钙钛矿结构,但掺杂浓度在50%~70%时有ZnO衍射峰,其电阻率在100 K以上随温度而下降,当掺杂浓度为x=0.3时电阻率最低。当Zn2+和Sr2+共掺而     

La2O3掺杂对(Bi1/2Na1/2)0.94Ba0.06TiO3陶瓷性能与微结构的影响

采用传统陶瓷工艺方法制备了La2O3掺杂(Bi1/2Na1/2)0.94Ba0.06TiOa(BNBT6)无铅压电陶瓷,系统地研究了La2O3掺杂对该体系陶瓷介电、压电性能与微观结构的影响.结果表明:该体系具有很高的压电常数,是单一的钙钛矿结构,La2O3的添加对晶粒生长具有一定的抑制作用,线收缩率和相对密度增大.室温介电常数随着La2O3掺杂量的增加而增大.与不添加La2O3的陶瓷样品相比,添加少量La2O3可以使体系的弛豫特征更为明显.当掺杂量为0.1 wt%时,该体系陶瓷具有较好的综合性能:d3a=160 pC/N,kp=0.322.当掺杂量达到0.5 wt%以后,陶瓷的压电性能严重降低.     

（Dy_（0．65）Tb_（0．25）Pr_（0．1））_2（Fe_（1－x）A

报道了（Ｄｙ０．６５Ｔｂ０．２５Ｐｒ０．１）２（Ｆｅ１－ｘＡｌｘ）１７赝二元化合物的结构及居里温度随合Ａｌ量变化的一些观测结果，并运用Ｘ射线衍射强度理论，计算了该种化合物的衍射强度，确定了Ａｌ原子在晶体中所占的晶位，由此，定性地说明了居里温度升高的原因。     

稀土Nd掺杂对Sr（Fe0.5Nb0.5）O3基介质陶瓷巨介电性能的影响

铁铌酸锶是一种重要的介质材料,具有复合钙钛矿结构,同其他介质材料相比,具有相对高的介电常数的优点,在高储能等领域有重要的应用潜力,是一种用途广泛的功能陶瓷材料．实验以Sr（Fe0.5Nb0.5）O3基陶瓷为研究对象,研究了稀土Nd掺杂对该系陶瓷巨介电性能的影响．结果表明：随着Nd抖掺杂量的增加,陶瓷样品的介电常数逐渐变大;随着温度的上升,陶瓷体系的介电常数也逐渐增大;Nd抖含量x≤0．10时,陶瓷样品有着良好的频率稳定性,x=0．10的陶瓷样品在100kHZ下有着良好的温度稳定性．     

空位掺杂(La(0.7-x)Y0.3)2/3Ca1/3MnO3的结构及其微观机制研究

利用标准的固相反应法在1 200℃烧结了(La(0.7-x)Y0.3)2/3Ca1/3MnO3(x=0,0.02,0.04,0.08,0.10)样品,冷却后,取出部分在1 350℃进行再烧结.利用X射线衍射(XRD)和扫描电镜(SEM)对其晶体结构及表面微观结构进行了研究.X射线衍射测量分析表明样品均为单相,单胞仍然具有正交对称性结构(空间群为Pnm a).通过扫描电镜研究表明,当化合物x=0.04时,(La(0.7-x)Y0.3)2/3Ca1/3MnO3的表面形貌表现为致密度最好.样品在1 350℃再烧结条件下,当x≤0.04时,可以大大降低样品的晶粒大小和孔隙;但当x>0.04时,再烧结对样品的晶体结构和表面微观结构影响不大.     

Synthesis and fluorescence properties of Tb(Ⅲ) complexes with pyridine-2,6-dicarboxylic acid derivatives

Two novel ligands named 4-styrylpyridine-2,6-dicarboxylic acid (4-SPDA) and 4-(4-(2-(2, 6-dicarboxypyridin-4-yl)-vinyl)styryl)pyridine-2,6-dicarboxylic acid(DSPDA) and their complexes with Tb(Ⅲ) were synthesized and characterized by infrared spectrometry, 1H nuclear magnetic resonance, elemental analysis and gas chromatograph-mass spectrometry. The ligand synthetic route was optimized. The fluorescence properties of the complex in solid state, in different kind of solvents and in solutions with different pH values were investigated in detail. The results show that the yields of DSPDA and 4-SPDA reach over 78% by Wittig-Horner reaction and other eight pyridine-2, 6-dicarboxylic acid derivatives with different substituents on pyridine ring, and their complexes with Tb(Ⅲ) are also obtained. The fluorescence intensities of the complexes with electron-donating groups are more intense than those of the complexes with electron-withdrawing groups on pyridine ring; fluorescence intensities of the complexes are the strongest in neutral solution (pH=7), and the less the dipole moment of solvent molecule is, the stronger the fluorescence intensity is. It is found that the two ligands (4-APDA and DSPDA) are the good sensitizers for Tb(Ⅲ) ion.     

2,2-二氰基甲叉-3-氰基-4-（N,N-二乙氨基苯乙烯基）-5,5-二甲基-2,5-二氢呋喃的合成及光学性质

设计并合成了＂D-π-A＂绿色发光化合物,2,2-二氰基甲叉-3-氰基-4-（N,N-二乙氨基苯乙烯基）-5,5-二甲基-2,5-二氢呋喃,用IR,1H NMR和元素分析表征了它的结构并测试了其在不同环境中的光谱性质。化合物在氯仿中（1×10-4mol/L）的最大波长吸收峰（λmax）位于535 nm处。在530 nm激发波长的激发下,该化合物显示出很强的荧光发射峰,位于681 nm（氯仿中）处。随着化合物（氯仿中）浓度的增加,荧光强度增强,但浓度增加至1×10-3mol/L时,出现猝灭现象。溶剂极性也对发射波长和荧光强度产生影响,随着溶剂极性增大,最大发射波长红移且荧光强度增强,从558 nm（苯中）红移到623 nm（丙酮中）。     

Synthesis and fluorescence properties of Tb（Ⅲ） complexes with pyridine-2,6-dicarboxylic acid derivatives

Two novel ligands named 4-styrylpyridine-2,6-dicarboxylic acid （4-SPDA） and 4-（4-（2-（2, 6-dicarboxypyridin-4-yl）- vinyl）styryl）pyridine-2,6-dicarboxylic acid（DSPDA） and their complexes with Tb（Ⅲ） were synthesized and characterized by infrared spectrometry, 1H nuclear magnetic resonance, elemental analysis and gas chromatograph-mass spectrometry. The ligand synthetic route was optimized. The fluorescence properties of the complex in solid state, in different kind of solvents and in solutions with different pH values were investigated in detail. The results show that the yields of DSPDA and 4-SPDA reach over 78% by Wittig-Horner reaction and other eight pyridine-2, 6-dicarboxylic acid derivatives with different substituents on pyridine ring, and their complexes with Tb（Ⅲ） are also obtained. The fluorescence intensities of the complexes with electron-donating groups are more intense than those of the complexes with electron-withdrawing groups on pyridine ring; fluorescence intensities of the complexes are the strongest in neutral solution （pH=7）, and the less the dipole moment of solvent molecule is, the stronger the fluorescence intensity is. It is found that the two ligands （4-APDA and DSPDA） are the good sensitizers for Tb（Ⅲ） ion.     

(Gd2O3)x（ZrO2）1-x（x=0.05-0.15）电解质材料的电导及其分子动力学模拟

为了探讨作为固体氧化物燃料电池电解质材料的可行性,采用交流阻抗谱研究了(Gd2O3)x(ZrO2)1-x(x=0.05-0.15)固体电解质材料的晶粒电导率,并通过分子动力学方法模拟了Gd2O3掺杂ZrO2固体电解质材料的动力学行为,计算并分析了温度和Gd2O3掺杂量对体系离子传导性能的影响.实验和模拟结果均表明,升高温度能明显增强离子电导性能.当Gd2O3掺杂量为8 mol%时,材料的电导性能取得最优值.     

Synthesis and luminescence properties of Eu3＋, Sm3＋ doped （YxGd1-x）2O3： Si4＋, Mg2＋ long-lasting phosphor

A novel red long-lasting phosphor,(Y1-xGdx)2O3:Eu3+,Sm3+,Si4+,Mg2+,was synthesized by the co-precipitation method using oxalate precipitation as the precursor.X-ray diffraction(XRD),scanning electronic microscopy(SEM),integrated thermal analyzer(TG),and photoluminescence spectra(PL) as well as the ST-900PM weak light photometer were used to study the synthesis conditions,morphology,luminescence properties,and the decay time of the phosphor.The XRD results show that the products synthesized at 1400°C for 4 h...