A Triarylboron-Based Fluorescent Thermometer: Sensitive Over a Wide Temperature Range

Authors

  • Jiao Feng,

    1. Beijing National Laboratory for Molecular Sciences, Key laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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  • Kaijun Tian,

    1. Beijing National Laboratory for Molecular Sciences, Key laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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  • Dehui Hu,

    1. Beijing National Laboratory for Molecular Sciences, Key laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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  • Dr. Shuangqing Wang,

    1. Beijing National Laboratory for Molecular Sciences, Key laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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  • Dr. Shayu Li,

    Corresponding author
    1. Beijing National Laboratory for Molecular Sciences, Key laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
    • Beijing National Laboratory for Molecular Sciences, Key laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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  • Dr. Yi Zeng,

    1. Key Laboratory of Photochemical Conversion and Optoelectronic, Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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  • Prof. Dr. Yi Li,

    Corresponding author
    1. Key Laboratory of Photochemical Conversion and Optoelectronic, Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
    • Key Laboratory of Photochemical Conversion and Optoelectronic, Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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  • Prof. Dr. Guoqiang Yang

    Corresponding author
    1. Beijing National Laboratory for Molecular Sciences, Key laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
    • Beijing National Laboratory for Molecular Sciences, Key laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)
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  • We acknowledge the National Natural Science Foundation of China (grant nos. 20703049, 20733007, 20873165, 50973118), the National Basic Research Program (2007CB808004, 2009CB930802), and Chinese Academy of Sciences.

Abstract

original image

Feeling blue: The luminescence of a triarylboron compound has a high quantum yield (at least 0.64) over a wide temperature range (−50 to +100 °C) and changes from green to blue as the temperature is increased (see picture). The luminescence color was determined by the population of the two distinct excited-state conformations—a local excited state (high temperature) and a twisted intramolecular charge-transfer state (low temperature).

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