铽－甲基吲哚乙酰丙酮三元配合物发光过程研究

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．     

稀土铽配合物的有机发光二极管

有机小分子和有机高分子的发光二极管在可见光区内有非常高的量子效率，因而受到人们的高度重视．采用二胶（TPD），8羟基喹啉铝（Alq3）等有机小分子作为空穴和电子输运层所作的发光二极管[1]的量子效率可达10％，采用聚对苯乙炔（PPV）高分子聚合物作空穴输运层，有机小分子2     

Luminescence kinetic and association equilibria of lanthanide ions in aqueous solutions. II. Determination of the formation constant of Tb acetato complex by means of luminescence lifetime measurement

The association constant K of mono-acetato complex of Tb³⁺ has been determined at normal p and T conditions by measurement of its luminescence lifetime in aqueous solution containing increasing concentrations of acetate. Two experimental arrangements used for the measurement are described.     

在硅磷酸镧中Ce^3＋离子对Tb^3＋离子的敏化

实验表明在La2O3·0.01SiO2·0.95P2O5基质中Ce^3 对Tb^3 有强的敏化作用。254nm紫外光激发下温度对Tb^3 激活的Ce^3 、Tb^3 共激活试样的发射强度的Ce^3 、Tb^3 共激活的试样Tb^3 的^5D4→^7F6:5:4跃迁的发射强度随湿度的变化。计算了Ce^3 到Tb^3 的能量传递效率。初步探讨了Ce对Tb的能量传递机理。     

光谱复杂的稀土基体中稀土杂质ICP光谱测定的一些问题

ICP激发光源以其独特的功能使ICP/AES技术在稀土分析中的应用日益广泛,在一定程度上取代了经典的直流电弧光谱法,但应指出,由于常规雾化器的低雾化效率(≤5％)和试样的高倍稀释,ICP/AES技术的实际检测能力的改善并不明显,本文用ICP光谱法测定了     

铽(Ⅲ)-1,4-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)丁二酮-[1,4]体系荧光性质的研究及应用

本文研究了Tb(Ⅲ)-1,4-双(′-苯基-3′-甲基-5′-氧代吡唑-4′-基)丁二酮-[1,4](BPMPBD)-溴化十六烷基三甲胺(CTMAB)体系的荧光性质,探讨了响影体系荧光性质的诸因素,确定了最佳实验条件。该体系中Tb(Ⅲ)浓度以2.0×10~(-5)～1.0×10~(-10)mol/L范围内与其荧光强度呈线性关系,检测限可达到5.0×10~(-11)mol/L。应用于合成样品中微量Tb(Ⅲ)的分析,结果令人满意。     

Study on the new fluorescence enhancement system of Tb-1,10-bis(2′-carboxylphenyl)-1,4,7,10-tetraoxadecane in silver chloride collosol and its analytical application

A new salicylic-based open-chain crown ether ligand, 1,10-bis(2′-carboxylphenyl)-1,4,7,10-tetraoxadecane (BCPTD) was synthesized. Solutions of its complex with Tb³⁺ can emit the intrinsic fluorescence of Tb³⁺. The fluorescence intensity of the complex in KCl solution was enhanced by the addition of silver(I), leading to a new fluorescence enhancement phenomenon. The spectrofluorimetric determination of traces of silver(I) based on the above phenomenon was carried out. The excitation and emission wavelengths are 298 and 545 nm, respectively. Under optimal conditions, the differential value of fluorescence intensity in the absence and presence of Ag⁺ was proportional to the concentration of silver(I) in the range 0.5-20 μg ml⁻¹. The method was applied to the determination of silver(I) in a standard ore sample. The analytical performance is investigated in detail by using common aromatic carboxylic acids or synthetic analogues of BCPTD as ligands to replace BCPTD. It was found that Tb-aromatic acid complexes did not result in fluorescence enhancement of Tb³⁺ in AgCl collosol. The phenomenon was only observed in Tb(III) with BCPTD or its open-chain crown ether analogues solutions.In addition, the enhancement of the fluorescence intensity of terbium(III) in these complexes depends on the extent of formation of the AgCl collosol.     

一缩二甘醇酸体系荧光分析法同时测定钆和铽

本文研究了Ｇｄ＾３＾＋，Ｔｂ＾３＾＋与一缩二甘醇酸形成络合物的荧光性能及发光机理，探讨了Ｇｄ＾３＾＋，Ｔｂ＾３＾＋同时测定的最佳条件和共存离子的影响。Ｇｄ＾３＾＋，Ｔｂ＾３＾＋的检测限分别为１６０和３ｎｇ／ｍｌ。并将该法成功地应用于稀土氧化物中Ｇｄ＾３＾＋，Ｔｂ＾３＾＋的测定。     

Screening of antagonists based on induced dissociation of a calmodulin-melittin interaction entrapped in a sol-gel derived matrix

Sol-gel derived materials offer a unique advantage for the development of sensing and screening platforms in that they allow for the entrapment of multiple species within a confined space. In this work, we show that it is possible to entrap an intact protein-peptide interaction, consisting of bovine calmodulin (bCaM) and melittin, into a sol-gel derived silicate material. Fluorescence emission data demonstrate that the entrapped complex behaves similarly to the complex in solution, and can undergo reversible dissociation upon introduction of the denaturant guanidine hydrochloride. Screening of antagonists of the bCaM-melittin complex was accomplished based on induced dissociation of the entrapped complex, which was followed by measuring the loss of sensitization of Tb(III) luminescence originating from energy transfer from the Trp of melittin to Tb(III) bound in the loops of bCaM. This study shows that entrapped protein-peptide complexes can be used as targets for drug screening or for fluorescence-based biosensing.     

稀土长链配合物的合成及其性质研究

通过筛选配体、优化合成条件,设计合成了以Tb3 为中心离子,以苯甲酸、水杨酸、对羟基苯甲酸、对甲基苯甲酸、大茴香酸、间氯苯甲酸、对氨基苯甲酸、磺基水杨酸为第一配体,以十一烯酸为第二配体合成8种铽三元荧光配合物。通过红外光谱分析、紫外光谱分析、元素分析、EDTA配位滴定分析以及电导率的测定确定了铽三元荧光配合物的分子结构和组成,采用热分析仪研究了铽三元荧光配合物的热稳定性能,其热稳定性强弱顺序为:Tb(SSA)(UA).3H2O磺基水杨酸>大茴香酸>对氨基苯甲酸>苯甲酸>水杨酸>对羟基苯甲酸>间氯苯甲酸,同时对产生上述现象的原因进行了初步的理论探讨。