纳米Ag@SiO<sub>2</sub>核壳结构的表面等离子体共振效应对铕配合物的荧光增强作用

引用本文: 李晶晶, 栗源, 王爱玲, 屈燕荣, 岳彬, 周丹, 褚海斌, 赵永亮. 纳米Ag@SiO₂核壳结构的表面等离子体共振效应对铕配合物的荧光增强作用[J]. 物理化学学报, 2014, 30(12): 2328-2334. doi: 10.3866/PKU.WHXB201409292 shu

Citation: LI Jing-Jing, LI Yuan, WANG Ai-Ling, QU Yan-Rong, YUE Bin, ZHOU Dan, CHU Hai-Bin, ZHAO Yong-Liang. Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO₂ Core-Shell Structure[J]. Acta Physico-Chimica Sinica, 2014, 30(12): 2328-2334. doi: 10.3866/PKU.WHXB201409292 shu

纳米Ag@SiO₂核壳结构的表面等离子体共振效应对铕配合物的荧光增强作用

基金项目:
国家自然科学基金(21161013) (21161013)

内蒙古自然科学基金(2011MS0202) (2011MS0202)

内蒙古重大基础研究开放基金(2010KF03)资助 (2010KF03)

摘要:

分别制备了二氧化硅壳层厚度为10、25和80 nm的三种Ag@SiO₂纳米粒子, 合成了铕与不同比例苯甲酸根(BA)的配合物、铕与1, 10-邻菲罗啉(phen)及2, 2'-联吡啶(bpy)的配合物, 并对其进行表征. 表征结果推测配合物的组成为Eu(BA)_nCl_3-n·2H₂O (n=1, 2, 3)、Eu(phen)Cl₃·2H₂O和Eu(bpy)Cl₃·2H₂O. 配合物的荧光光谱显示, 在加入Ag@SiO₂纳米粒子后, 复合物的荧光强度有不同程度的增加, 这可能是由于表面等离子体共振造成的. 不同硅壳厚度的Ag@SiO₂纳米粒子的荧光增强顺序是25 nm>80 nm>10 nm, 这表明二氧化硅核壳厚度约25 nm时有较强的表面等离子体共振效应. 此外, 在这些复合物中, Eu(phen)Cl₃·2H₂O复合物的增强效果是最强的, 而Eu(BA)_nCl_3-n·2H₂O的增强效果是最弱的. 在三个苯甲酸铕配合物中, Eu(BA)₃·2H₂O的增强效果最弱, 其他两个苯甲酸铕复合物增强效果相对较好. 原因可能是含氮配合物(Eu(phen)Cl₃·2H₂O和Eu(bpy)Cl₃·2H₂O)可以和Ag@SiO₂更好地成键, 而苯甲酸铕配合物和Ag@SiO₂纳米粒子的作用相对较弱. Ag@SiO₂纳米粒子有望应用于增强稀土材料的发光.

关键词:

English

Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO₂ Core-Shell Structure

1.
College of Chemistry and Chemical Engineering, Inner Mon lia University, Hohhot 010021, P. R. China
Received Date: 31 July 2014
Available Online: 27 November 2014
Fund Project:
国家自然科学基金(21161013)

内蒙古自然科学基金(2011MS0202)

内蒙古重大基础研究开放基金(2010KF03)资助

Abstract:

Three types of Ag@SiO₂ nanoparticles with silica shell thicknesses of around 10, 25, and 80 nm were prepared. Europium complexes with benzoate (BA) in different proportions, 1, 10-phenanthroline (phen) and 2, 2'-bipyridine (bpy), were synthesized and characterized. The results suggest that the complexes have the formulas Eu(BA)_nCl_3-n ·2H₂O (n=1, 2, 3), Eu(phen)Cl₃ ·2H₂O, and Eu(bpy)Cl₃ ·2H₂O. The luminescence spectra of the complexes showed that adding Ag@SiO₂ nanoparticles increased the fluorescence intensity. The fluorescence enhancement sequence of the different silica shell thickness Ag@SiO₂ nanoparticles was 25 nm> 80 nm>10 nm, which showed that the local surface plasmon resonance was strongest at the silica shell thickness of about 25 nm. Furthermore, the enhancement effect for the Eu(phen)Cl₃·2H₂O complex was the strongest and that for the benzoic complex Eu(BA)_nCl_3-n·2H₂O was the weakest in these complexes. For the three benzoic complexes, the enhancement effect of Eu(BA)₃·2H₂O was the lowest. The nitrogenous complexes (Eu(phen)Cl₃ and Eu(bpy)Cl₃) could combine withAg@SiO₂ nanoparticles very well, while the interaction of Eu(BA)₃· 2H₂O with Ag@SiO₂ nanoparticles was weaker. Ag@SiO₂ nanoparticles are expected to enhance luminescence of rare earth materials.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

纳米Ag@SiO₂核壳结构的表面等离子体共振效应对铕配合物的荧光增强作用

English

Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO₂ Core-Shell Structure

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

纳米Ag@SiO2核壳结构的表面等离子体共振效应对铕配合物的荧光增强作用

English

Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO2 Core-Shell Structure

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

纳米Ag@SiO₂核壳结构的表面等离子体共振效应对铕配合物的荧光增强作用

Surface Plasmon Resonance Enhanced Luminescence of Europium Complexes with Ag@SiO₂ Core-Shell Structure

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs