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Metal-free polymerization: synthesis and properties of fused benzo[1,2-b:4,5-b′]bis[b]benzothiophene (BBBT) polymers

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Abstract

We report the “green” synthesis and characterization of a series of fused benzo[1,2-b:4,5-b′]bis[b]benzothiophene (BBBT) polymers containing a phenyl ring and naphthalene as comonomers, as well as BBBT homopolymers. These novel fused polymers have been obtained from simple acid and hexaethyltriaminophosphine catalyzed polymerization without involving any metal catalyst. The effect of the different aromatic units on the optical and electronic properties of the resulting polymers has been studied. It was found that these polymers possess high electron affinities due to the presence of electron-deficient lactams on each repeat unit. BBBT-P and BBBT-N exhibit NIR absorption spectra with the tail extending to 1000 nm, while the BBBT homopolymer exhibits a large blue-shifted absorption.

Graphical abstract: Metal-free polymerization: synthesis and properties of fused benzo[1,2-b:4,5-b′]bis[b]benzothiophene (BBBT) polymers

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Article information


Submitted
28 Apr 2020
Accepted
18 May 2020
First published
19 May 2020

Polym. Chem., 2020, Advance Article
Article type
Communication

Metal-free polymerization: synthesis and properties of fused benzo[1,2-b:4,5-b′]bis[b]benzothiophene (BBBT) polymers

L. Yao, H. Liao, M. K. Ravva, Y. Guo, J. Duan, Y. Wang, Y. Yu, Z. Li, I. McCulloch and W. Yue, Polym. Chem., 2020, Advance Article , DOI: 10.1039/D0PY00623H

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