Influence of Gd3+ and Y3+ on Luminescence of Eu3+ in Complexes of Rare Earth with Dibenzoylmethide and 2,2′-dipyridyl

ZHAO Yong-liang; ZHAO Feng-ying

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Influence of Gd³⁺ and Y³⁺ on Luminescence of Eu³⁺ in Complexes of Rare Earth with Dibenzoylmethide and 2,2′-dipyridyl

更新时间：2020-08-11

- Influence of Gd³⁺ and Y³⁺ on Luminescence of Eu³⁺ in Complexes of Rare Earth with Dibenzoylmethide and 2,2′-dipyridyl
- Chinese Journal of Luminescence Vol. 23, Issue 3, Pages: 273-276(2002)
- 作者机构：
  
  1. 内蒙古大学化学化工学院,内蒙古呼和浩特,010021
  2. 北京大学稀土材料化学及应用国家重点实验室北京,100871
  3. 内蒙古农业大学基础部,内蒙古呼和浩特,010019
- 作者简介：
- 基金信息：
- DOI：
  CLC： O482.31
- Received：18 September 2001，
  
  Revised：20 March 2002，
  
  Published：20 May 2002
- 稿件说明：
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赵永亮, 赵凤英. 二苯甲酰基甲烷2,2′-联吡啶混合稀土配合物中钆、钇对铕发光的影响[J]. 发光学报, 2002,23(3): 273-276

ZHAO Yong-liang, ZHAO Feng-ying. Influence of Gd3+ and Y3+ on Luminescence of Eu3+ in Complexes of Rare Earth with Dibenzoylmethide and 2,2′-dipyridyl[J]. Chinese Journal of Luminescence, 2002,23(3): 273-276
赵永亮, 赵凤英. 二苯甲酰基甲烷2,2′-联吡啶混合稀土配合物中钆、钇对铕发光的影响[J]. 发光学报, 2002,23(3): 273-276 DOI：

ZHAO Yong-liang, ZHAO Feng-ying. Influence of Gd3+ and Y3+ on Luminescence of Eu3+ in Complexes of Rare Earth with Dibenzoylmethide and 2,2′-dipyridyl[J]. Chinese Journal of Luminescence, 2002,23(3): 273-276 DOI：

摘要

在乙醇溶液中合成了以二苯甲酰基甲烷(DBM)和2

2′联吡啶(Dipy)为配体

三价铕、等摩尔三价铕钆及等摩尔三价铕钇混合稀土为中心体的配合物。测定了配合物的组成

研究了其红外光谱和荧光光谱。结果表明:配合物的最佳激发波长为425nm;在425nm波长光激发下

配合物发出较强的荧光;不发光的Gd

和Y

离子对Eu

离子的发光有一定增强作用

其中钇使铕的荧光发射增强大于钆;这两个不发光稀土离子对铕的发射峰位影响不大。

Abstract

The yellow complexes of Eu

1/2 Eu

and 1/2 Re

(Re

=Gd

or Y

)with dibenzoylmethide (DBM) and 2

2-dipyridyl(Dipy) have been synthesized in anhydrous alcohol.The elemental analysis showed that their compositions are Eu(Dipy)(DBM)

0.5

(Dipy)(DBM)

and Eu

0.5

(Dipy)(DBM)

respectively.Their infrared spectra were recorded on a Nexus 670 FT-

R spectrophotometer

the results indicated that the chemical bonds have formed by the rare earth ions with the two ligands.The luminescence spectra were taken on F-3010 fluorescence spectrophotometer.The measurement results showed that the excitation spectra are similar

the optimum excitation wavelength is at 425nm.The measurement results of the emission spectra of the complexes excited by 425nm light indicated that there are five groups of emission peaks for Eu(Dipy)(DBM)

the first group peak at 5816nm

belong to

→

transitions of Eu

ion

the second group consists of two peaks

at 592.6nm and 598.8nm

belong to

→

transitions of Eu

ion

the third group peaks at 613.8nm and 619.6nm (

transitions)

the fourth peaks at 652.8nm (

→

transitions) and there are two peaks at 694.8nm and 705.6nm in the fifth group

they belong to

→

transitions of Eu

ion.The fluorescence emission peak positions did not change obviously in both mixed rare earth

omplexes.The fluorescence emission intensity of

→

transitions is the strongest.Comparison with the values of determined (

d) and calculated (

c)of

→

transitions of the complexes

the determined values of Eu

0.5

(Dipy)(DBM)

are 2091(613.6nm) and 1934(619.6nm)

but for Eu

0.5

(Dipy)(DBM)

they are 2183(613.6nm) and 2014(619.6nm).Their calculated values

c=1208(613.6nm)and 1155 (619.6nm)

which are smaller than the determined values.These situations showed that there are sensitizations actions from Gd

and Y

to Eu

in these investigated rare earthc omplexes.

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