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New Anthracene Derivatives as Triplet Acceptors for Efficient Green-to-Blue Low-Power Upconversion

Authors

  • Dr. Zuo-Qin Liang,

    1. Jiangsu Key Laboratory for Environment Function Materials, School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 (PR China), Fax: (+86) 512-68326615
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  • Bin Sun,

    1. Jiangsu Key Laboratory for Environment Function Materials, School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 (PR China), Fax: (+86) 512-68326615
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  • Dr. Chang-Qing Ye,

    1. Jiangsu Key Laboratory for Environment Function Materials, School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 (PR China), Fax: (+86) 512-68326615
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  • Prof. Xiao-Mei Wang,

    Corresponding author
    1. Jiangsu Key Laboratory for Environment Function Materials, School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 (PR China), Fax: (+86) 512-68326615
    • Jiangsu Key Laboratory for Environment Function Materials, School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 (PR China), Fax: (+86) 512-68326615

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  • Prof. Xu-Tang Tao,

    1. State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100 (PR China)
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  • Prof. Qin-Hua Wang,

    1. Institute of Modern Optical Technologies, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215006 (PR China)
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  • Ping Ding,

    1. Jiangsu Key Laboratory for Environment Function Materials, School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 (PR China), Fax: (+86) 512-68326615
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  • Bao Wang,

    1. Jiangsu Key Laboratory for Environment Function Materials, School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 (PR China), Fax: (+86) 512-68326615
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  • Jing-Jing Wang

    1. Jiangsu Key Laboratory for Environment Function Materials, School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou, 215009 (PR China), Fax: (+86) 512-68326615
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Abstract

Three new anthracene derivatives [2-chloro-9,10-dip-tolylanthracene (DTACl), 9,10-dip-tolylanthracene-2-carbonitrile (DTACN), and 9,10-di(naphthalen-1-yl)anthracene-2-carbonitrile (DNACN)] were synthesized as triplet acceptors for low-power upconversion. Their linear absorption, single-photon-excited fluorescence, and upconversion fluorescence properties were studied. The acceptors exhibit high fluorescence yields in DMF. Selective excitation of the sensitizer PdIIoctaethylporphyrin (PdOEP) in solution containing DTACl, DTACN, or DNA-CN at 532 nm with an ultralow excitation power density of 0.5 W cm−2 results in anti-Stokes blue emission. The maximum upconversion quantum yield (ΦUC=17.4 %) was obtained for the couple PdOEP/DTACl. In addition, the efficiency of the triplet–triplet energy transfer process was quantitatively studied by quenching experiments. Experimental results revealed that a highly effective acceptor for upconversion should combine high fluorescence quantum yields with efficient quenching of the sensitizer triplet.

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