铕－二苯甲酰甲烷－氯化十六烷基吡啶体系的荧光特性及其分析应用

研究了铕－二苯甲酰甲烷－氯化十六烷基吡啶体系在加入微量Ｇｄ３＋后的三乙醇胺缓冲溶液中的荧光特性及分析应用．结果表明：该体系在最佳测量条件下反应速度快且稳定性好；铕浓度在１．０×１０－１０～１．０×１０－８ｍｏｌ·Ｌ－１范围内呈线性关系，在信噪比为３时，最低检出浓度为２．６×１０－１１ｍｏｌ·Ｌ－１，常见稀土离子对测定无干扰，用于稀土氧化物中铕的测定，结果令人满意     

稀土—二苯甲酰甲烷配合物微晶的合成及荧光光谱

合成了稀土（ＲＥ）二苯甲酰甲烷（ＤＢＭ）配合物ＲＥ（ＤＢＭ）３·Ｈ２Ｏ（ＲＥ＝Ｓｍ、Ｅｕ、Ｔｂ、Ｄｙ、Ｐｒ、Ｎｄ、Ｇｄ、Ｙ）,用红外光谱、紫外光谱及差热热重谱对其进行了表征,用透射电镜观察了该配合物微晶尺寸,并研究了配合物在固态时的荧光光谱．结果表明该系列配合物微晶的尺寸在５０～２５０ｎｍ之间,在ＲＥ（ＤＢＭ）３·Ｈ２Ｏ（ＲＥ＝Ｓｍ、Ｅｕ）中可观察到较强的稀土离子的特征发射,而在ＲＥ（ＤＢＭ）３·Ｈ２Ｏ（ＲＥ＝Ｔｂ、Ｄｙ）中只能观察到配体自身发射     

发红色荧光铽配合物的合成及荧光性能的研究

以二苯甲酰甲烷(HDBM)为第一配体,邻菲罗啉(phen)和二吡啶并[3,2-a:2',3'-c]哇喔啉(dpq)为第二配体合成两种三元铽配合物,并进行元素分析、稀土络合滴定、摩尔电导率、红外光谱、紫外光谱、荧光激发和发射光谱的测定,推测化合物的组成分别为:Tb(DBM)3phen,Tb(DBM)3dpq.DBM通过氧...     

A Novel Ternary Complex of Europium(Ⅲ) for Eletroluminescent Device

IntroductionSince Tang[1] and Adachi et al.[2 ] reportedtheir double- and triple- layered devices,organicelectroluminescent(EL ) devices have attracted agreat interest due to their efficient emission in thevisible region and their possible application to flatpanel full color display.Among red- emissionorganic materials,europium complexes haveattracted researchers intense attention[3— 10 ]because the sharp emission band of Eu- complexeshas demonstrated the advantage of a very sharp ELemissio…     

Enhanced Luminescence of Europium by Gadolinium and Its Application

Abstract

The fluorescence enhancement of the Eu-dibenzoylmethane(DBM)- cetylpyridinium-chloride (CPC) system was studied. The fluorescence intensity of the system can be greatly increased by Gd³⁺ in the presence of triethanolamine(TEA). The optimum conditions for enhanced fluorescence of the Eu-Gd-DBM-CPC system were examined. It was a linear function of the Eu³⁺ concentration in the range of 1.0×10^?10～1.0×10^?8 mol dm^?3 under the optimized conditions. The detection limit was 2.6 × 10¹¹ mol dm^?3 in an aqueous solution at pH=7.5～9.5.

The Eu-Gd-DBM-CPC system was applied to the determination of europium in rare earth oxides with satisfactory results. The mechanism of enhanced fluorescence was discussed.     

Syntheses and electroluminescent properties of two europium ternary complexes Eu(DBM)3(PBO) and Eu(DBM)3(PBT)

Two europium complexes, Eu(DBM)₃(PBO) and Eu(DBM)₃(PBT) (DBM=dibenzoylmethanato, PBO=2-(2-pyridyl)benzoxazole, PBT=2-(2-pyridyl)benzothiazole), were prepared and used as emitting materials in organic electroluminescent (EL) devices. The devices with the structures ITO/TPD/Eu(DBM)₃(PBO) (or Eu(DBM)₃(PBT)/BCP/Alq₃/Mg:Ag/Ag emit red light originating from the europium complexes.     

Synthesis,X-ray crystal structure and photophysical properties of tris(dibenzoylmethanido)(1,10-phenanthroline)samarium(III)

Herein we report for the first time the complete characterization and photophysical properties of tris(dibenzoylmethanido)(1,10-phenanthroline)samarium(III) (Sm(DBM)₃phen) in the absence of a polymer matrix. The solid state structure of Sm(DBM)₃phen has been determined by single-crystal X-ray crystallography and shows the geometry of the local coordination environment around the samarium(III) ion to be a slightly distorted square antiprism. The absolute quantum yield and luminescence lifetime were measured as 0.86 ± 0.40% and 41 ± 2 μs, respectively.     

稀土掺杂铕(Ⅲ)二苯甲酰甲烷邻菲咯啉三元配合物的合成和荧光性质

合成了 3个系列稀土掺杂铕二苯甲酰甲烷 (Hdbm)邻菲咯啉 (phen)三元配合物 Eux RE1 -x(dbm) 3 phen(RE=La,Y,Gd;x=0 .0 0、0 .1 0、0 .30、0 .5 0、0 .70、0 .80、0 .90、1 .0 0 ) ,通过元素分析、摩尔电导率、红外光谱、X射线粉末衍射对配合物进行了表征。对各配合物系列进行荧光光谱研究 ,发现 L a3 、Y3 和 Gd3 对Eu3 离子均有荧光增敏作用 ,其荧光增敏顺序为 L a3 >Y3 >Gd3 。     

Development of a PVC-membrane ion-selective bulk optode,for UO<Stack><Subscript>2</Subscript><Superscript>2+</Superscript></Stack> ion,based on tri-<Emphasis Type="Italic">n</Emphasis>-octylphosphine oxide and dibenzoylmethane

A novel uranyl ion-selective bulk optode membrane, incorporating tri-n-octylphosphine oxide for cation recognition and a lipophilic chromoionophore dibenzoylmethane, has been prepared. The PVC membrane composition was optimized to result in the widest working concentration range. The response range of the proposed optode is 4.1×10^–6 to 2.0×10^–4 mol L^–1 UO₂²⁺. The probe works at pH 4.0. Ion interference is low and selectivity, reproducibility, and stability are good.