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Issue 2, 2019
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Synthesis, characterization and photophysical studies of a novel polycyclic diborane

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Abstract

Treatment of tetrakis(dimethylamino)diboron (B2(NMe2)4) with 1,4-bis(2-(triisopropylsilyl)ethynyl)naphthalene-2,3-diamine (1) generated a large NBBN polycyclic compound 1,1-B2{2,3-(NH)2-1,4-(iPr3SiC2)2C10H4} (2). The X-ray structure analysis reveals that 2 has a twisted structure (dihedral angle ≈ 21.75°) with a rather short B–B bond (1.667(9) Å). Theoretical calculations on 1,1-B2 isomer 2 and its counterpart 1,2-B2 isomer 3 have been conducted to understand their frontier orbital energy levels. Compound 2 shows strong emission with a high quantum yield of 0.52, despite the presence of many unbeneficial non-radiative behaviors such as the vibration of the TIPS groups and the rotation of the B–B single bond.

Graphical abstract: Synthesis, characterization and photophysical studies of a novel polycyclic diborane

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Publication details

The article was received on 01 Nov 2018, accepted on 01 Dec 2018 and first published on 04 Dec 2018


Article type: Letter
DOI: 10.1039/C8NJ05550E
Citation: New J. Chem., 2019,43, 564-568
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    Synthesis, characterization and photophysical studies of a novel polycyclic diborane

    C. Yao, K. Zhao, G. Long, X. Li, Z. Gong, Y. Zhong, W. Gao, Y. Li, R. Ganguly, G. Li and Q. Zhang, New J. Chem., 2019, 43, 564
    DOI: 10.1039/C8NJ05550E

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