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Low-potential electrosynthesis of conducting and electroactive oligocatecholborane with blue light-emitting properties

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Abstract

Novel conducting oligocatecholborane (OCOB) with electrical conductivity of 3.73 × 10−2 S cm−1 was successfully synthesized by low-potential electropolymerization of catecholborane (COB) in boron trifluoride diethyl etherate at 0.70 V versus Ag/AgCl. FT-IR and 1H-NMR spectra, together with the computational results, proved that COB was polymerized through the coupling at C(4) and C(5) positions and the reactive B - H bond was stable during the electrochemical polymerization. The resulting product was mainly composed of oligomers with short chain lengths by GPC and mass spectral results. The as-formed OCOB film showed good electrochemistry in monomer-free electrolytes with the electrochromic property from opaque blue to sap green. Fluorescence studies indicated that soluble OCOB can emit bright blue light under excitation of 365 nm UV light with the maximum emission at 396 nm and a fluorescence quantum yield of 0.21. The deposited OCOB also exhibited favorable thermal stability and smooth and compact morphology even at high magnifications.

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Authors and Affiliations

  1. School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, 330013, China

    Bao-yang Lu, Shuai Chen, Lei-qiang Qin, Yao Huang & Jing-kun Xu  (徐景坤)

  2. School of Materials Science & Engineering, Shandong University, Jinan, 250061, China

    Bao-yang Lu & Jing-kun Xu  (徐景坤)

Authors
  1. Bao-yang Lu
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  2. Shuai Chen
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  3. Lei-qiang Qin
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  4. Yao Huang
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  5. Jing-kun Xu  (徐景坤)
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Corresponding author

Correspondence to Jing-kun Xu  (徐景坤).

Additional information

The work was financially supported by the National Natural Science Foundation of China (Nos. 50963002 and 51073074), Jiangxi Provincial Department of Education (Nos. GJJ11590, GJJ10678 and GJJ12595), the Natural Science Foundation of Jiangxi Province (No. 2010GZH0041) and Jiangxi Science & Technology Normal University (No. KY2010ZY13).

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Lu, By., Chen, S., Qin, Lq. et al. Low-potential electrosynthesis of conducting and electroactive oligocatecholborane with blue light-emitting properties. Chin J Polym Sci 31, 159–170 (2013). https://doi.org/10.1007/s10118-013-1205-z

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  • DOI: https://doi.org/10.1007/s10118-013-1205-z

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