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

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (4): 657.

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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.

Abstract

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

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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[J]. Chem. J. Chinese Universities, 2010, 31(4): 657.

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

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