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NIR luminescence of a visible-light-sensitized neodymium complex with large experimental fluorescence branching ratio for 4F3/2→4I11/2 in PMMA

Published online by Cambridge University Press:  13 May 2011

Xin Wang ,
Lijuan Wang ,
Yanhua Luo ,
Wenxuan Wu ,
Xiujie Tian ,
Qijin Zhang  and
Biao Chen
Xin Wang
Affiliation:
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Lijuan Wang
Affiliation:
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Yanhua Luo
Affiliation:
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Wenxuan Wu
Affiliation:
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Xiujie Tian
Affiliation:
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Qijin Zhang*
Affiliation:
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
Biao Chen
Affiliation:
Department of History of Science and Technology and Archaeometry, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: zqjm@ustc.edu.cn
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Abstract

In this work, a visible-light-sensitized neodymium complex with 2-(N,N-diethylanilin-4-yl)-4,6-bis(3,5-dimethylpyrazol-1-yl)-1,3,5-triazine (Dpbt) as a synergetic ligand is synthesized and incorporated into poly(methyl methacrylate) (PMMA). Absorption and luminescent spectra of Nd(TTA)3Dpbt (TTA = thenoyltrifluoroacetonate) in PMMA are measured and compared with common complex Nd(TTA)3Phen (Phen = 1,10-phenanthroline). As a result, Nd(TTA)3Dpbt has relatively high luminescent intensity and wide excited spectral range, attributed to the sensitization of the ligand Dpbt. Judd–Ofelt analysis is used, and Judd–Ofelt parameters are calculated (Ω2 = 33.72 × 10−20 cm2, Ω4 = 11.52 × 10−20 cm2, and Ω6 = 6.81 × 10−20 cm2). The radiative properties are predicted and compared with other different Nd complexes. The stimulated emission cross-section of 4F3/2→4I11/2 transition is 3.02 × 10−20 cm2 and the estimated lifetime is 506 μs using the Judd–Ofelt parameters. Experimental fluorescence branching ratio of this transition is quite high for Nd ions. The radiative properties’ investigation for 4F3/2→4I11/2 transition indicates that it is possible to be a laser transition.

Keywords

NdOptical propertiesLuminescence
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 12 , 28 June 2011 , pp. 1517 - 1523
Copyright
Copyright © Materials Research Society 2011

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