Spectra Analyses of Europium Complexes with Benzoic Acid and Its Derivatives

ZHENG Ling-zhi; ZHOU Zhong-cheng; SHU Wan-gen

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Spectra Analyses of Europium Complexes with Benzoic Acid and Its Derivatives

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- Spectra Analyses of Europium Complexes with Benzoic Acid and Its Derivatives
- Chinese Journal of Luminescence Vol. 27, Issue 3, Pages: 373-377(2006)
- 作者机构：
  
  中南大学, 粉末冶金国家重点实验室,湖南长沙,410083
- 作者简介：
- 基金信息：
- DOI：
  CLC： O482.31;O614.33
- Received：21 June 2005，
  
  Revised：2005-9-12，
  
  Published：20 May 2006
- 稿件说明：
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郑灵芝, 周忠诚, 舒万艮. 铕与苯甲酸及其衍生物配合物的光谱分析[J]. 发光学报, 2006,27(3): 373-377

ZHENG Ling-zhi, ZHOU Zhong-cheng, SHU Wan-gen. Spectra Analyses of Europium Complexes with Benzoic Acid and Its Derivatives[J]. Chinese Journal of Luminescence, 2006,27(3): 373-377
郑灵芝, 周忠诚, 舒万艮. 铕与苯甲酸及其衍生物配合物的光谱分析[J]. 发光学报, 2006,27(3): 373-377 DOI：

ZHENG Ling-zhi, ZHOU Zhong-cheng, SHU Wan-gen. Spectra Analyses of Europium Complexes with Benzoic Acid and Its Derivatives[J]. Chinese Journal of Luminescence, 2006,27(3): 373-377 DOI：

摘要

合成了铕与苯甲酸及其衍生物(苯甲酸、邻苯二甲酸、间苯二甲酸、水杨酸、邻氨基苯甲酸、磺基水杨酸)的二元配合物.经元素分析确定其组成式.研究了它们的红外吸收光谱、紫外吸收光谱及荧光光谱.紫外光谱的研究表明

配合物的紫外吸收主要表现为配体的吸收.红外光谱的研究表明

配合物的红外光谱不同于自由配体的红外光谱

证明了稀土与有机物形成了配合物.荧光光谱的研究表明

其中铕与苯甲酸、邻苯二甲酸及间苯二甲酸形成的配合物表现出铕的特征荧光.其中以苯甲酸铕的发射峰最强

最强发射峰位于λ=618nm处

显示铕的红光特征;而铕与磺基水杨酸、邻氨基苯甲酸、水杨酸的配合物却主要表现出配体的宽带发射

其中邻氨基苯甲酸铕分别在λ=399

452

547nm处有三个弱的发射峰

磺基水杨酸铕也只在λ=407nm处有一宽发射峰

未显示出铕的红光特征.

Abstract

In order to study regularity of fluorescence of complexes about rare earth with different benzoic acid

we have prepared much of BA-compiexes

COOH(R=o-NH

p-NH

o-OH

m-Cl

o-COOH

m-COOH

p-COOH

p-OH

m-NO

5-Dinitro

p-Br

o-I

2-OH-5-SO

H.They can be synthesized complexes with Sm

.Under UV-excitation the complexes with Eu

have higher emitting intensity than complexes with Sm

.There are some science bases about study a new luminophor.Spectra analyses of the complexes of europium with benzoic acid and its derivatives are discussed.The binary complexes of europium with benzoic acid and its derivatives benzene carbonic acid

phthalic acid

isophthahc acid

salicylic acid

o-aminobenzoic acid sulfosalicylic acid have been synthesized.They were characterized by elemental analysis

UV-Vis

H NMR

fluorescence spectra and molar conductance.The UV spectra showed that the complexes' ultraviolet absorption were from the ligands(220-350 nm)

so that it could transfer energy to rare earth.The measurement results of the emission spectra of the complexes indicated as follows the emission of Eu(BA)

Eu(m-Phth)

·3H

O and Eu(o-Phth)

·3H

O consisted of three peaks at 582

596

and 618 nm which were caused from

→

(

2)transition of Eu

respectively.Among these peaks the emission from

→

is the shrongest.But the emission of Eu o-aminobenzoic acid consisted(of three)peaks at 399

452

547 nm

and that of sulfosalicylic acid-Eu only one peak at 407 nm

which(were caused)from ligands.Fluorescence spectra show that there aren't red-characteristic emission of Eu in Eu(o-Amino)

and Eu(Ssal)

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