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Issue 2, 2019

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

Supplementary files

Article information


Submitted
01 Nov 2018
Accepted
01 Dec 2018
First published
04 Dec 2018

New J. Chem., 2019,43, 564-568
Article type
Letter

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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