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Title: ipso-Arylative Ring-Opening Polymerization as a Route to Electron-Deficient Conjugated Polymers

Journal Article · · Angewandte Chemie (International Edition)

Abstract ipso ‐Arylative ring‐opening polymerization of 2‐bromo‐8‐aryl‐8 H ‐indeno[2,1‐b]thiophen‐8‐ol monomers proceeds to M n up to 9 kg mol −1 with conversion of the monomer diarylcarbinol groups to pendent conjugated aroylphenyl side chains (2‐benzoylphenyl or 2‐(4‐hexylbenzoyl)phenyl), which influence the optical and electronic properties of the resulting polythiophenes. Poly(3‐(2‐(4‐hexylbenzoyl)phenyl)thiophene) was found to have lower frontier orbital energy levels (HOMO/LUMO=−5.9/−4.0 eV) than poly(3‐hexylthiophene) owing to the electron‐withdrawing ability of the aryl ketone side chains. The electron mobility (ca. 2×10 −3  cm 2  V −1  s −1 ) for poly(3‐(2‐(4‐hexylbenzoyl)phenyl)thiophene) was found to be significantly higher than the hole mobility (ca. 8×10 −6  cm 2  V −1  s −1 ), which suggests such polymers are candidates for n‐type organic semiconductors. Density functional theory calculations suggest that backbone distortion resulting from side‐chain steric interactions could be a key factor influencing charge mobilities.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1484440
Alternate ID(s):
OSTI ID: 1484394
Report Number(s):
BNL-209640-2018-JAAM
Journal Information:
Angewandte Chemie (International Edition), Vol. 57; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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