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1.
硝酸稀土-邻菲罗啉-甘氨酸三元配合物的合成及其表征   总被引:1,自引:1,他引:0  
合成了RE(Phen)2(Gly)(NO3)3.3H2O(其中RE=La,Ce,Pr,Nd,Gd,Sm,Er,Y;Phen=邻菲罗啉;Gly=甘氨酸)固体配合物,对所合成的配合物进行元素分析、摩尔电导、IR、UV、TG-DTA等的分析测试,初步研究了配合物的组成,结构及性质。  相似文献   

2.
用红外光谱研究阴离子对镧甘氨酸配合物结构的影响   总被引:3,自引:1,他引:2  
本文合成了阴离子为氯离子和高氯酸根的镧的甘氨酸配合物La(Gly)3(ClO4)3·H2O和La(Gly)3Cl3·3H2O,测定了配合物的红外光谱,并作了比较研究。结果表明:配合物因阴离子的不同而形成二种不同的结构,二者都为一维长链结构,但甘氨酸的配位方式不同;在La(Gly)3Cl3·3H2O中,有两分子水参与了配位,而La(Gly)3(ClO4)3H2O中则有一分子的高氯酸根参与了配位。  相似文献   

3.
Nd(Pro)3(Phen)Cl3·2H2O三元固体配合物的FTIR光谱和Raman光谱   总被引:2,自引:0,他引:2  
合成了Nd(Pro)3(Phen)Cl3.2H2O三元固体配合物,测定了配合物的 红外光谱和Raman光谱,对配合物分子的振动频率作了归属。光谱数据表明,钕(Nd )屯脯食氨酸(Pro)的羧酸基形成四员螯环,与邻啡罗啉(Phen)的C=N基形成五员螯环。  相似文献   

4.
均苯四甲酸-三苯基氧化膦-铽-钇配合物的高效发光   总被引:1,自引:0,他引:1  
合成了PMA-Tb^3+,PM-ATPPO(Phen)-Tb^3+及其掺杂Y^3+,Gd63+的系列配合物,常温下研究了它们的固体粉末荧光光谱,发现在二元配合物中掺杂Y^3+比掺杂Gd^3+发光强,在三元配合物中以三苯基氧化膦作第二配体比以邻菲罗林作第二配体的配合物发光强,得到了鲜艳绿色的高效荧光材料PMA-TPPO-Tb^3+,Y^3+。  相似文献   

5.
铽-甲基吲哚乙酰丙酮三元配合物发光过程研究   总被引:1,自引:0,他引:1  
测定和分析了RE.L1.L2(RE=Tb(Ⅲ)、Gd(Ⅲ),L1=3M(3甲基吲哚-1-乙酰基丙酮),L2=TPPO、Phen、Dipy)三元配合物的荧光光谱、磷光光谱、磷光寿命及变温荧光光谱等.讨论了Tb(Ⅲ)与配体之间的能级匹配和L1与L2的三重态之间传能的问题,说明了影响这些三元配合物荧光效率的主要因素及其发光过程.  相似文献   

6.
镧和铕与邻菲罗啉谷氨酸配合物的NMR和IR研究   总被引:1,自引:0,他引:1  
合成了稀土镧和铕与谷氨酸,邻菲罗啉形成的二元及三元配合物,经元素分析确定该配合物的组成为Ln(phen)(Glu)3.7H2O(Ln=La,Eu);Eu(Glu)3;12H2O。用核磁共振和红外光谱研究与配体与稀土离子的配位方式,讨论了稀土离子的顺磁性及屏蔽效应对配合物的NMR谱图的影响。  相似文献   

7.
在水溶液中制备出配合物[Ln(Gly)2.4H2O].Cl3.nH2O(Ln=G,Er,Yb),测定了配合物的红外光谱,并对其主要红外吸收带进行了归属。结果表明,甘氨酸以内盐的形式存在于配合物中,并通过羧基与稀土离子配位。四个水分子参与了配位,在Gd和Er的配合物还有一个不分子未参与配位。推测Yb配合物为对称的一维无限长链结构,其余两种配合物为不对称的一维无限长链。  相似文献   

8.
本文报道了Eu(Ⅲ)与烟酸(HL)及邻菲咯啉(Phen)形成的三元固态配合物。通过元素分析、热谱分析和摩尔电导确定其化学组成为RE(Phen)L3,并利用红外、紫外光谱、核磁共振谱和X-射线粉末衍射对配合物进行了表征。研究了配合物的荧光性质。  相似文献   

9.
本文报道两个CU(Ⅰ)-膦配合物CUCl(PPh3)3和Cu2Cl2(PPh3)3的合成、表征。发现它们是光致发光的。研究了其红外、紫外可见的吸收光谱和发射光谱。研究表明,配合物的光谱性质主要来源于配体PPh3,Cu-P配合对光谱性质的影响不大。  相似文献   

10.
合成了铕(Ⅲ)与2-噻吩甲酰三氟丙酮(HTTA)和1,10-邻菲罗啉(Phen)及其衍生物的三元固体配合物,研究了它们的红外光谱和荧光光谱。  相似文献   

11.
通过静电纺丝技术获得直径约为700 nm,均匀且随机取向的亚微米级Eu(DBM)3Phen/PMMA纤维。在紫外光辐射下,亚微米级荧光纤维发出明亮的红色荧光。其激发光谱表明,荧光纤维有效激发波长范围为200~400 nm。利用积分球配以CCD探测器,在367 nm长波紫外LED激发下对荧光纤维开展绝对光谱功率测试。当LED泵浦功率为535.76#W时,厚度80#m的Eu(DBM)3Phen/PMMA纤维薄层对紫外辐射的吸收率高达89%,350~850 nm范围内发射的总绝对光谱功率、总光子数和总荧光量子产率分别为36.56#W、11.46×10~(13)cps和12.94%。亚微米级Eu(DBM)_3Phen/PMMA纤维薄层中,Eu~(3+)较高的跃迁发射几率及较大的发射截面使得纤维可以高效吸收紫外辐射并转变为可见光,在提高太阳能电池光电转换效率方面具有潜在应用价值。  相似文献   

12.
合成了一种新型的稀土配合物Eu0.5Tb0.5(TTA)3Phen,并采用原位乳液聚合法进一步制备了Eu0.5Tb0.5(TTA)3Phen/PMMA稀土聚合物.利用红外光谱仪(IR)、电子探针X射线能谱仪等对其结构进行了表征,利用扫描隧道电子显微镜(SEM)、荧光光谱仪(FS)等研究了其微观形貌,并探讨了其发光性能.结果表明,聚合物中PMMA与稀土部分Eu0.5Tb0.5(TTA)3Phen通过键合的方式结合,仍保持Eu0.5Tb0.5(TTA)3Phen原有的发光特性;在365 nm紫外光的激发下,产生发光峰在611.8 nm附近、谱线带宽为10.4nm的红光发射,发光亮度高,色纯度高;Eu0.5Tb0.5(TTA)3Phen/PMMA具有良好的发光性能,其发光强度与MMA加入的含量有关.  相似文献   

13.
Langmuir-Blodgett (LB) films of different molar percentages of Eu(TTA)3Phen (TTA=2-thenoyltrifluoroacetone; Phen=1,10-phenanthroline) with Gd(TTA)3Phen coexisting with arachidic acid (AA) (complexes:AA=1:l, in molar ratio) were fabricated and the luminescence enhancement of Eu(III) in the films was studied in this investigation. The monolayers and LB films were characterized by π-A isotherms, fluorescence microscopy, UV-vis spectroscopy and low-angle X-ray diffraction. High-quality LB films and strongly luminescent films were obtained. It was learned from the present study that an efficient intermolecular energy transfer occurred from Gd(TTA)3Phen to Eu(TTA)3Phen in the films, which resulted in the luminescence enhancement effect. According to the proposed model of the “active enhancement circle” the distance of energy transfer from Gd-, Tb-, La-, and Y-complex to Eu-complex were calculated to be 1.2, 1.2, 0.7 and 1.0 nm, respectively.  相似文献   

14.
Ternary and tertiary complexes of Tb(Sal)(3)Phen and Gd:Tb(Sal)(3)Phen were synthesized and characterized in PVA polymer. The structural properties of these systems were evaluated on the basis of NMR and FT-IR techniques. The absorption, excitation and emissive properties of the Tb(3+) ion were improved when coordinated with Sal and Phen ligands. Photoluminescence properties of the complexes in solution, crystals and dispersed in PVA film were explored in steady state and in time domain. Selective excitations (487, 355, 310 and 266 nm) of Tb(3+), Sal and Gd(3+) ions reveal an intramolecular energy transfer process. The emission of Gd:Tb(Sal)(3)Phen complex in PVA indicates the contribution of Gd(3+) ion to enhance the emission intensity of Tb(3+) ion. On the basis of these investigations, photophysics was widely discussed in terms of energy transfer and encapsulation effect.  相似文献   

15.
Uninuclear europium (Eu), as well as binuclear Eu and terbium (Tb), complexes were synthesized using acrylic acid (AA) as the first ligand and 1,10-phenanthroline (Phen) as the second ligand. The relative weight ratio of the europium (III) (Eu3+) to terbium (III) (Tb3+) ions of the binuclear complex was 1:1 as determined via energy dispersive X-ray analysis. The structures of the Eu(AA)3Phen and Eu0.5Tb0.5(AA)3Phen complexes were characterized by Fourier transform infrared spectroscopy. A series of tri-cellulose acetate (TCA)/ the Eu(AA)3Phen and TCA/Eu0.5Tb0.5(AA)3Phen composites were prepared by solution blending, and their luminescent properties were investigated by fluorescence spectrophotometry. The excitation spectra of all composites indicated that the TCA matrix probably affected the energy absorption and transfer of organic ligands. In TCA/Eu0.5Tb0.5(AA)3Phen composites the introduced Tb3+ ions had some influence on energy absorption and transfer of organic ligands; the energy transfer process of the complex is suggested to be as follows: Phen→AA→Tb3+ion→Eu3+ion. The emission spectra indicated that the luminescent intensity of the TCA/Eu0.5Tb0.5(AA)3Phen composites was noticeably stronger than that of the TCA/Eu(AA)3Phen composites, suggesting that the comparatively stable and high-efficiency energy transfer process was only slightly influenced by the TCA matrix. In summary, the TCA/Eu0.5Tb0.5(AA)3Phen (90/10) composite possesses fine luminescent properties for potential usage as red fluorescent materials.  相似文献   

16.
通过大分子反应将苯甲酸(BA)键合在聚苯乙烯(PS)侧链, 制得芳羧酸功能化的聚苯乙烯PSBA。以PSBA为大分子配基, 以邻菲啰啉(Phen)为小分子配体, 与Tb(Ⅲ)离子配位, 分别制备了二元配合物PS-(BA)3-Tb(Ⅲ)与三元配合物PS-(BA)1-Tb(Ⅲ)-(Phen)2及PS-(BA)1-Tb(Ⅲ)-(Phen)3,采用红外光谱(FTIR)和紫外吸收光谱(UV) 对配合物进行了表征, 深入研究了配合物(溶液与薄膜)的荧光发射性能。 研究结果表明, 大分子配基PSBA与Tb(Ⅲ)离子所形成的二元或三元高分子-稀土配合物均能发射出很强的Tb(Ⅲ)离子特征荧光, 即键合在PSBA侧链的配基BA能有效地敏化Tb(Ⅲ)离子的荧光发射。与二元配合物相比较, 以小分子Phen为第二配体所形成的两种三元配合物具有强度更高的荧光发射。  相似文献   

17.
Silver (Ag) nanoparticles (NPs) were prepared by laser ablation in water with an aim to enhance the luminescence of rare earth coordinated complex in polymer host. A fixed concentration of the complex containing Samarium (Sm), Salicylic acid (Sal) and 1, 10-phenanthroline (Phen) were combined with different concentrations of silver NPs in PolyVinyl Alcohol at room temperature. Absorption spectrum and XRD patterns of the sample show that the Sm(Sal)3Phen complex is accompanied by Ag NPs. The luminescence from the complex was recorded in the presence and absence of Ag NPs using two different excitation wavelengths viz. 400 and 355 nm. Of these, 400 nm radiation falls in the surface plasmon resonance of Ag NPs. It was found that the Ag NPs led to a significant enhancement in luminescence of the complex. Surprisingly, a high concentration of Ag NPs tends to quench the luminescence.  相似文献   

18.
Tb(Asprin)_3Phen/SiO_2壳/核型纳米材料的合成和光学性质   总被引:1,自引:1,他引:0  
利用W/O微乳液方法合成了直径为40 nm的具有类壳/核结构的Tb(Asprin)3Phen/SiO2纳米球.透射电子显微镜(TEM)证实了该纳米球具有尺寸均一,分散性好的特点.另外,通过TEOS与APS在微乳液中同时水解,在材料的表面引入了大量的氨基,为材料的生物应用提供了有利的条件.红外光谱(FT-IR)和光致发光光谱分析也显示了这种材料在生物领域中有着潜在的应用前景.  相似文献   

19.
A simple route for fabricating highly ordered luminescent thin films based on hybrid material of diblock copolymer and europium complex, assisted with self-organization of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymer upon solvent annealing, is presented. PS-b-PEO self-organized into hexagonal patterns and europium complex of Eu(BA)3Phen was selectively embedded in PS blocks after solvent annealing in benzene or benzene/water vapor. During benzene annealing, the orientation of the PEO cylindrical domains strongly depended on the Eu(BA)3Phen concentration. In contrast, when the hybrid thin films were annealed in mixture of benzene and water vapor, high degree of orientation of the PEO cylindrical domains is more easily obtained, which is independent of Eu(BA)3Phen concentration. Furthermore, preferential interaction of PEO domains with water induces a generation of nanopores in the hybrid thin film. Atomic force microscopy (AFM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to characterize the long-range lateral order and phase composition of the hybrid thin films. The ordered nanohybrid thin films kept the fluorescence property of Eu(BA)3Phen and showed a strong red emission under the 254 nm light's irradiation. The fluorescence property was confirmed by photoluminescence (PL) spectra.  相似文献   

20.
合成了Eu(Ⅲ)与偏苯三甲酸(TLA)、2-噻酚甲酰三氟丙酮(HTTA)和邻菲罗啉(Phen)形成的两个新的四元配合物。运用元素分析、红外光谱、扫描电镜、热重与荧光光谱等手段对它们进行了系统的表征。研究结果表明,偏苯三甲酸与2-噻酚甲酰三氟丙酮Eu(Ⅲ)和邻菲罗啉形成的四元配合物,具有比偏苯三甲酸Eu(Ⅲ)和邻菲罗啉形成的三元配合物更强的荧光强度与更宽的紫外激发,比配合物Eu(TTA)3Phen更好的热稳定性。得到了两种热稳定性较好的鲜艳红色荧光材料。  相似文献   

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