钇(Ⅲ)、铽(Ⅲ)、铒(Ⅲ)对氨基苯甲酸配合物共掺杂二氧化硅的光声光谱研究

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (4): 657.

钇(Ⅲ)、铽(Ⅲ)、铒(Ⅲ)对氨基苯甲酸配合物共掺杂二氧化硅的光声光谱研究

杨跃涛, 汪海燕, 刘晓俊, 张淑仪

南京大学近代声学教育部重点实验室, 声学研究所, 南京 210093

收稿日期:2009-04-28 出版日期:2010-04-10 发布日期:2010-04-10
通讯作者: 杨跃涛, 男, 教授, 主要从事功能材料合成及性能研究. E-mail: yyang@nju.edu.cn
基金资助:
国家自然科学基金(批准号: 10874088, 10874087)资助.

Photoacoustic Study of Y³⁺, Tb³⁺ and Er³⁺ Complexes with Aminobenzoic Acid Co-doped Silica Samples

YANG Yue-Tao*, WANG Hai-Yan, LIU Xiao-Jun, ZHANG Shu-Yi

Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics, Nanjing University, Nanjing 210093, China

Received:2009-04-28 Online:2010-04-10 Published:2010-04-10
Contact: YANG Yue-Tao. E-mail: yyang@nju.edu.cn
Supported by:
国家自然科学基金(批准号: 10874088, 10874087)资助.

摘要/Abstract

摘要：

合成了Tb(p-ABA)₃·H₂O和Ln(p-ABA)₃·H₂O(p-ABA: 对氨基苯甲酸, Ln: Y或Er)配合物共掺杂的SiO₂样品. 荧光光谱测定结果表明, Y(p-ABA)₃·H₂O的引入增强了样品中Tb³⁺离子的特征发光, 而Er(p-ABA)₃·H₂O的引入使Tb³⁺的发光减弱. 光声光谱结果表明, 与Tb³⁺配合物单掺的样品相比, Tb³⁺和Y³⁺配合物共掺样品的光声强度降低; 而Tb³⁺和Er³⁺配合物共掺的样品则情况相反. 实验测定了共掺杂样品的相对量子发光效率和发光寿命, 从无辐射跃迁和辐射跃迁的角度提出共发光效应可能的机制. 结合对室温下陈化干燥样品的分析发现, 只有经适当的热处理过程才能在SiO₂凝胶中形成具有多核结构的稀土配合物.

关键词: 稀土配合物; 光声光谱; 硅胶; 共发光效应

Abstract:

Lanthanide complexes Tb(p-ABA)₃·H₂O and Ln(p-ABA)₃·H₂O(p-ABA=p-aminobenzoic acid; Ln =Y or Er) co-doped silica samples were prepared. It was found that the characteristic emissions of Tb³⁺ in the silica samples increase with the addition of Y(p-ABA)₃·H₂O, while the reverse is true with the addition of Er(p-ABA)₃·H₂O. Compared with only Tb³⁺ complex doped silica sample, the photoacoustic intensity in the region of the ligand absorption decreases for Tb³⁺ and Y³⁺ complexes co-doped sample, and increases for Tb³⁺ and Er³⁺ complexes co-doped sample. The relative luminescence quantum yields and lifetime for the co-doped samples were determined, and the possible mechanism for the co-luminescence phenomena was interpreted from two aspects: radiative and nonradiative processes. Lanthanide complexes doped wet silica gels, which have undergone aging and drying at room temperature only, were also studied. The results indicate that p-ABA does not coordinate with the lanthanide ions in the silica gels without a suitable heat treatment. The co-luminescence effect found in this work will contribute the better design of new type of luminescence materials.

Key words: Lanthanide complex; Photoacoustic spectroscopy; Silica gel; Co-luminescence effect

TrendMD:

杨跃涛, 汪海燕, 刘晓俊, 张淑仪. 钇(Ⅲ)、铽(Ⅲ)、铒(Ⅲ)对氨基苯甲酸配合物共掺杂二氧化硅的光声光谱研究. 高等学校化学学报, 2010, 31(4): 657.

YANG Yue-Tao*, WANG Hai-Yan, LIU Xiao-Jun, ZHANG Shu-Yi. Photoacoustic Study of Y³⁺, Tb³⁺ and Er³⁺ Complexes with Aminobenzoic Acid Co-doped Silica Samples. Chem. J. Chinese Universities, 2010, 31(4): 657.

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