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Open AccessArticle

Simple Route to Synthesize Fully Conjugated Ladder Isomer Copolymers with Carbazole Units

1
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
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College of Physics Science and Technology, Hebei University, Baoding 071002, China
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(10), 1619; https://doi.org/10.3390/polym11101619
Received: 18 August 2019 / Revised: 30 September 2019 / Accepted: 2 October 2019 / Published: 7 October 2019
Two isomer polymers, P3 and P6, with fully conjugated ladder structures are presented by simple synthetic routes. The well-defined structures of fully conjugated ladder polymers P3 and P6 were ensured by the high yields of every reaction step. The fully rigid ladder structures were confirmed by nuclear magnetic resonance (NMR), fourier transform infrared spectroscopy (FTIR), and photophysical test. Polymers P3 and P6 with bulky alkyl side chains exhibit good solution processability and desirable thermostable properties. After the intramolecular cyclization reaction, the band gaps of polymers P3 and P6 become lower (2.86 eV and 2.66 eV, respectively) compared with polymers P1 and P4. This initial study provides insight for the rational design of fully ladder-conjugated isomeric polymers with well-defined structures. View Full-Text
Keywords: carbazole; ladder; BO embedded; isomer carbazole; ladder; BO embedded; isomer
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MDPI and ACS Style

Chen, S.; Liu, F.; Wang, C.; Shen, J.; Wu, Y. Simple Route to Synthesize Fully Conjugated Ladder Isomer Copolymers with Carbazole Units. Polymers 2019, 11, 1619.

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