Preparation and Fluorescence Properties of Ternary Complexes of Eu(BA)&lt;sub&gt;3&lt;/sub&gt;PIP and Eu(BA)&lt;sub&gt;3&lt;/sub&gt;phen

REN Xiao-ming; WEI Chang-ping; WANG Peng; MA Zhi-peng; CONG Xiao-qing

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Preparation and Fluorescence Properties of Ternary Complexes of Eu(BA)3PIP and Eu(BA)3phen

paper | 更新时间：2020-08-12

- Preparation and Fluorescence Properties of Ternary Complexes of Eu(BA)3PIP and Eu(BA)3phen
- Chinese Journal of Luminescence Vol. 30, Issue 2, Pages: 252-256(2009)
- 作者机构：
 
 1. 长春理工大学材料科学与工程学院,吉林长春,130022
 2. 沈阳东基工业集团有限公司,辽宁沈阳,110045
- 作者简介：
- 基金信息：
- DOI：
 CLC： O82.31
- Received：30 December 2008，
 
 Revised：02 January 1900，
 
 Published Online：30 April 2009，
 
 Published：30 April 2009
- 稿件说明：
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REN Xiao-ming, WEI Chang-ping, WANG Peng, et al. Preparation and Fluorescence Properties of Ternary Complexes of Eu(BA)3PIP and Eu(BA)3phen[J]. Chinese journal of luminescence, 2009, 30(2): 252-256.
DOI：

REN Xiao-ming, WEI Chang-ping, WANG Peng, et al. Preparation and Fluorescence Properties of Ternary Complexes of Eu(BA)3PIP and Eu(BA)3phen[J]. Chinese journal of luminescence, 2009, 30(2): 252-256. DOI：

摘要

合成了邻菲罗啉(phen)衍生物2-苯基-咪唑并 -1

10-菲罗啉(PIP)

并以其为第二配体

苯甲酸(BA)为第一配体

制备出新型稀土铕三元有机配合物Eu(BA)

PIP;在相同条件下

第一配体不变

10-菲罗啉为第二配体

还制备出Eu(BA)

phen。采用元素分析、红外光谱、热重和差热分析等技术对合成的配体PIP及配合物Eu(BA)

PIP和Eu(BA)

phen进行了表征。通过发光光谱研究了配合物的发光性质

结果表明第二配体PIP有较大的共轭体系

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Eu

离子

表现出较强的Eu

离子的特征发射。两种配合物相比

Eu(BA)

PIP的发光强度明显大于Eu(BA)

phen的发光强度

说明适宜的第二配体对配合物有很好的敏化发光作用。

Abstract

Rare earth complex materials have been widely used in cathodoluminescent display phosphor screens

lasers and lamps because their photoluminescence (PL) exhibits high quantum efficiencies and very sharp spectral bands. The luminescence process of the rare earth complex is as follows:the electrons in excited single state of the ligand move to the triplet state by intrasystem relaxation process

followed by the energy transfers from the triplet state of the ligand to the nearest resonance level of the rare earth ion.In the luminescence process

the single state and triplet state can only be used.Theoretically

the internal quantum efficiency can reach 100％

which is four times than that of other fluorescent materials.When europium ion chelates with some organic ligands

such as benzoic acid(BA)

the emissions of rare earth Eu

ion exhibits highly pure red color and strong luminescence intensity. The intensity of sensitized luminescence of central lanthanide ions in a rare earth organic chelate depends on three factors.Firstly

the suitability of the energy gap between the excited triplet energy level of the ligands and the lowest excited energy level of rare earth ions. Secondly

the rigidity and planarity of the structure of the chelate molecule.Thirdly

the existence of a suitable secondary ligand which may increase the rigidity and the stability of the chelate molecule.In this paper

10-phenanthroline (phen) derivative

2-phenyl-imidazo [4

5-f] 1

10-phenanthroline (PIP) were synthesized.With benzoic acid(BA) as the first ligand and PIP as the secondary ligand

a new ternary organic europium complex Eu(BA)

PIP was prepared.In the same condition

with the same first ligand and phen as the secondary ligand

Eu(BA)

phen was also prepared. The structures and compositions of the ligand PIP

Eu(BA)

PIP and Eu(BA)

phen were confirmed by elemental analysis

IR spectra

TG analyses

the fluorescence properties [JP2]of the two complexes were also studied. Elemental analysis demonstrates that the compositions of the ternary[JP]

complexes are PIP

Eu(BA)

PIP and Eu(BA)

phen. IR spectra indicate that rare earth Eu

ion is coordinated with six oxygen atoms of three benzoic acid ligands and two nitrogen atoms of the second ligand.The emission spectra demonstrate that two kinds of ternary organic europium complex exhibit characteristic fluorescence of rare earth Eu

and the second ligand PIP has larger conjugation system

and under UV excitation

energy absorbed by the ligands in the complex can be transfed to the rare earth Eu

ion

so that it can emit characteristic luminescence of Eu

and the luminescence intensity of Eu(BA)

PIP is obviously higher than that of Eu(BA)

phen. The luminescence of complex was greatly sensitized by appropriate secondary ligand. TG analyses show that the thermal decomposition temperature of Eu(BA)

PIP are higher than that of Eu(BA)

phen. Thus the secondary ligand of 2-phenyl-imidazo [4

5-f] 1

10-phenanthroline(PIP) obviously enhanced the fluorescent intensity of Eu

and the thermal stability of europium complex. So

the new ternary organic europium complex of Eu(BA)

PIP is an excellent red-emitting material.

关键词

Keywords

references

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Preparation and Fluorescence Properties of Ternary Complexes of Eu(BA)<sub>3</sub>PIP and Eu(BA)<sub>3</sub>phen

DOI：

摘要

Abstract

关键词

Keywords

references