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Issue 35, 2017
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1,4-Azaborine as a controller of triplet energy, exciton distribution, and aromaticity in [6]cycloparaphenylenes

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Abstract

Cycloparaphenylenes (CPPs) have attracted the attention of researchers in various fields because of their unique properties, but studies and applications on host materials in the optoelectronics field are lacking. We undertook preliminary exploration and finally selected 1,4-azaborine and [6]CPP as the basic building blocks to construct a series of BN-[6]CPP hybrids. BN-[6]CPPs with various triplet energies (ET = 1.66–3.52 eV) could be the potential hosts in full-color phosphorescent organic light-emitting diodes (OLEDs). DFT/TDA-DFT calculations showed that introduction of 1,4-azaborine rings at different positions of the [6]CPP hoop could efficiently control delocalization (localization) of triplet excitons and T1-state aromaticity (non-aromaticity), and thus varied with the ET. This work provides not only an efficient strategy for realizing ET controllability for CPP-based materials by chemical modification of CPP frameworks, but also theoretical guidance for the design and prediction of novel hoop-shaped materials with high ET in the organic optoelectronics field.

Graphical abstract: 1,4-Azaborine as a controller of triplet energy, exciton distribution, and aromaticity in [6]cycloparaphenylenes

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Publication details

The article was received on 28 May 2017, accepted on 24 Jul 2017 and first published on 25 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02336G
Citation: J. Mater. Chem. C, 2017,5, 9088-9097
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    1,4-Azaborine as a controller of triplet energy, exciton distribution, and aromaticity in [6]cycloparaphenylenes

    J. Wu, Y. Kan, Z. Xue, J. Huang, P. Chen, X. Yu, Z. Guo and Z. Su, J. Mater. Chem. C, 2017, 5, 9088
    DOI: 10.1039/C7TC02336G

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