Citation: Ting-Ting Dai, Lei Liu, Dong-Liang Tao, Shi-Gang Li, Hong Zhang, Yu-Min Cui, Yong-Zhong Wanga, Ji-Tang Chen, Kun Zhang, Wen-Zhong Sun, Xiao-Yun Zhao. Influence of Gd doping on the absolute quantum efficiency and lifetime of Eu_xGd_1-x(TTA)₃phens[J]. Chinese Chemical Letters, ;2014, 25(6): 892-896. doi: 10.1016/j.cclet.2014.03.007 shu

Influence of Gd doping on the absolute quantum efficiency and lifetime of Eu_xGd_1-x(TTA)₃phens

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a College of Chemistry and Chemical Industry, Fuyang Normal College, Fuyang 236041, China;
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b Anhui Provincial Key Laboratory for Degradation and Monitoring of Pollution of the Environment, Fuyang 236041, China;
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c School of Physics and Electronic Science, Fuyang Normal College, Fuyang 236041, China

Corresponding author: Dong-Liang Tao, Shi-Gang Li,
Received Date: 6 January 2014
Available Online: 26 February 2014
Fund Project: The Project is supported by the National Natural Science Foundation of China (No. 50973003) (No. 50973003)Natural Science Foundation of FuyangNormal College (Nos. 2011HJJC02ZD, 2011HJJC01ZD, 2011HJJC04YB, 2010FSKJ01ZD, 2013FSKJ03ZD) (Nos. KJ2012B135, KJ2012A217, KJ2012B136, KJ2011A210, 1301042112) Incubator Fund of Scientific and Technological achievements of Fuyang Normal College (Nos. 2013KJFH03, 2013KJFH01). (Nos. 2011HJJC02ZD, 2011HJJC01ZD, 2011HJJC04YB, 2010FSKJ01ZD, 2013FSKJ03ZD)

Absolute quantum yield (Φ) is one of the most important parameters to evaluate the potential of novel materials. Lanthanide complexes Eu_xGd_1-x(TTA)₃phens are synthesized with the ratio of Gd³⁺ dopant concentration ranging from 10% to 90% to improve the absolute quantum yield. Eu_xGd_1-x(TTA)₃phens possess similar infrared and ultraviolet spectra, showing that they have similar molecular structures. The absolute emission quantum yields of Eu_xGd_1-x(TTA)₃phens are determined using a fluoromax-4 spectrofluorometer equipped with an integrating sphere. The fluorescence lifetimes of the Eu_xGd_1-x(TTA)₃phens are measured in the same experiment. It was found that both absolute quantum yields and fluorescence lifetimes of Eu_xGd_1-x(TTA)₃phens are of quasi-periodic variation with the change of the Gd³⁺ dopant concentrations. The absolute quantum efficiency and fluorescence lifetime vary with respect to the Gd content in an opposite fashion, indicating that the rate of energy absorption by the Eu_xGd_1-x(TTA)₃phens and the conversion to light energy is critical for the absolute quantum efficiency. The radiative rate constant K_r and non-radiative rate constant K_nr are calculated. The dependence of K_r and K_nr on the Gd³⁺ dopant concentrations is very similar to that of absolute quantum efficiency. The radiation rate constant K_r and absolute quantum efficiency have a linear relationship.
- Europium complexes,
- Gd doping,
- Absolute quantum yield,
- Fluorescent lifetime
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Influence of Gd doping on the absolute quantum efficiency and lifetime of EuxGd1-x(TTA)3phens

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通讯作者: 陈斌, bchen63@163.com

Influence of Gd doping on the absolute quantum efficiency and lifetime of Eu_xGd_1-x(TTA)₃phens