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Title: A study of the degree of fluorination in regioregular poly(3-hexylthiophene)

Abstract

Here, we systematically varied the degree of fluorination along the backbone of a series of highly regioregular 3-hexylthiophene-based polymers, P3HT-50F, P3HT-33F and P3HT-25F, in which 50%, 33% and 25% of the thiophene units within the polymer chain contain fluorine atoms in the available 4-position. These materials were homopolymerized using the Kumada catalyst transfer polycondensation method from a set of mono-fluorinated bi-, ter- and quarterthiophenes, to ensure high polymer regioregularity and evenly-spaced fluorine atoms along the conjugated thiophene backbone. The monomers were obtained from a synthetic route consisting of iterative Migita-Stille couplings of fluorinated and non-fluorinated 3- hexylthiophenes. The effect of the fluorine atoms on both polymer structure and properties is presented, with supporting quantum mechanical calculations that rationalize the intrinsic conformation preferences of the three P3HT derivatives. P3HT-50F (M¯n = 34 kg/mol, 98.5% rr), P3HT-33F (M¯n = 46 kg/mol, 98% rr) and P3HT-25F (M¯n = 53 kg/mol, 95% rr) displayed HOMO levels of -5.34, -5.26 and -5.24 eV, bandgaps of 1.98, 1.98 and 1.97 eV, and average field-effect transistor hole mobilities of 4.5 × 10-3, 2.7 × 10-2, and 1.2 × 10-2 cm2 V-1s-1, respectively.

Authors:
 [1];  [1];  [1];  [2];  [1];  [2];  [2];  [3];  [3]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. Laval, Quebec City (Canada)
  2. Harvard Univ., Cambridge, MA (United States)
  3. Univ. of Waterloo, Waterloo, ON (Canada)
Publication Date:
Research Org.:
Harvard Univ., Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1336363
Grant/Contract Number:  
SC0015959
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Macromolecules
Additional Journal Information:
Journal Volume: 50; Journal Issue: 1; Journal ID: ISSN 0024-9297
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Blaskovits, J. Terence, Bura, Thomas, Beaupre, Serge, Lopez, Steven A., Roy, Carl, de Goes Soares, Julio, Oh, Adam, Quinn, Jesse, Li, Yuning, Aspuru-Guzik, Alan, and Leclerc, Mario. A study of the degree of fluorination in regioregular poly(3-hexylthiophene). United States: N. p., 2016. Web. doi:10.1021/acs.macromol.6b02365.
Blaskovits, J. Terence, Bura, Thomas, Beaupre, Serge, Lopez, Steven A., Roy, Carl, de Goes Soares, Julio, Oh, Adam, Quinn, Jesse, Li, Yuning, Aspuru-Guzik, Alan, & Leclerc, Mario. A study of the degree of fluorination in regioregular poly(3-hexylthiophene). United States. https://doi.org/10.1021/acs.macromol.6b02365
Blaskovits, J. Terence, Bura, Thomas, Beaupre, Serge, Lopez, Steven A., Roy, Carl, de Goes Soares, Julio, Oh, Adam, Quinn, Jesse, Li, Yuning, Aspuru-Guzik, Alan, and Leclerc, Mario. 2016. "A study of the degree of fluorination in regioregular poly(3-hexylthiophene)". United States. https://doi.org/10.1021/acs.macromol.6b02365. https://www.osti.gov/servlets/purl/1336363.
@article{osti_1336363,
title = {A study of the degree of fluorination in regioregular poly(3-hexylthiophene)},
author = {Blaskovits, J. Terence and Bura, Thomas and Beaupre, Serge and Lopez, Steven A. and Roy, Carl and de Goes Soares, Julio and Oh, Adam and Quinn, Jesse and Li, Yuning and Aspuru-Guzik, Alan and Leclerc, Mario},
abstractNote = {Here, we systematically varied the degree of fluorination along the backbone of a series of highly regioregular 3-hexylthiophene-based polymers, P3HT-50F, P3HT-33F and P3HT-25F, in which 50%, 33% and 25% of the thiophene units within the polymer chain contain fluorine atoms in the available 4-position. These materials were homopolymerized using the Kumada catalyst transfer polycondensation method from a set of mono-fluorinated bi-, ter- and quarterthiophenes, to ensure high polymer regioregularity and evenly-spaced fluorine atoms along the conjugated thiophene backbone. The monomers were obtained from a synthetic route consisting of iterative Migita-Stille couplings of fluorinated and non-fluorinated 3- hexylthiophenes. The effect of the fluorine atoms on both polymer structure and properties is presented, with supporting quantum mechanical calculations that rationalize the intrinsic conformation preferences of the three P3HT derivatives. P3HT-50F (M¯n = 34 kg/mol, 98.5% rr), P3HT-33F (M¯n = 46 kg/mol, 98% rr) and P3HT-25F (M¯n = 53 kg/mol, 95% rr) displayed HOMO levels of -5.34, -5.26 and -5.24 eV, bandgaps of 1.98, 1.98 and 1.97 eV, and average field-effect transistor hole mobilities of 4.5 × 10-3, 2.7 × 10-2, and 1.2 × 10-2 cm2 V-1s-1, respectively.},
doi = {10.1021/acs.macromol.6b02365},
url = {https://www.osti.gov/biblio/1336363}, journal = {Macromolecules},
issn = {0024-9297},
number = 1,
volume = 50,
place = {United States},
year = {Tue Dec 27 00:00:00 EST 2016},
month = {Tue Dec 27 00:00:00 EST 2016}
}

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Works referenced in this record:

Aryl−Perfluoroaryl Substituted Tetracene: Induction of Face-to-Face π−π Stacking and Enhancement of Charge Carrier Properties
journal, April 2011


Fluorine Substituents Reduce Charge Recombination and Drive Structure and Morphology Development in Polymer Solar Cells
journal, January 2013


Polymer solar cells with enhanced open-circuit voltage and efficiency
journal, November 2009


Highly Efficient Solar Cell Polymers Developed via Fine-Tuning of Structural and Electronic Properties
journal, June 2009


Ultimate efficiency of polymer/fullerene bulk heterojunction solar cells
journal, February 2006


Impact of Backbone Fluorination on π-Conjugated Polymers in Organic Photovoltaic Devices: A Review
journal, January 2016


Poly(3-fluorothiophene)
journal, August 1994


Tetradecafluorosexithiophene:  The First Perfluorinated Oligothiophene
journal, May 2001


3-Fluoro-4-hexylthiophene as a Building Block for Tuning the Electronic Properties of Conjugated Polythiophenes
journal, February 2013


Functionalized Poly(3-hexylthiophene)s via Lithium–Bromine Exchange
journal, December 2014


Influence of Backbone Fluorination in Regioregular Poly(3-alkyl-4-fluoro)thiophenes
journal, May 2015


On the effect of poly(3-hexylthiophene) regioregularity on inkjet printed organic solar cells
journal, January 2009


High Mobility Ambipolar Diketopyrrolopyrrole-Based Conjugated Polymer Synthesized Via Direct Arylation Polycondensation
journal, September 2015


Direct (Hetero)arylation Polymerization: Trends and Perspectives
journal, July 2016


“Fibonacci’s Route” to Regioregular Oligo(3-hexylthiophene)s
journal, August 2013


Highly Selective 5-Substitution of 3-Methylthiophene via Directed Lithiation
journal, February 2007


Catalyst-Transfer Polycondensation. Mechanism of Ni-Catalyzed Chain-Growth Polymerization Leading to Well-Defined Poly(3-hexylthiophene)
journal, December 2005


Structural Analysis of Poly(3-hexylthiophene) Prepared via Direct Heteroarylation Polymerization
journal, May 2016


MALDI-ToF analysis of polythiophene: use of trans-2-[3-(4-t-butyl-phenyl)-2-methyl- 2-propenylidene]malononitrile-DCTB-as matrix
journal, March 2011


Determination of molecular weights and Mark–Houwink constants for soluble electronically conducting polymers
journal, December 1991


Kumada Catalyst-Transfer Polycondensation: Mechanism, Opportunities, and Challenges
journal, July 2011


Controlling Conformations of Conjugated Polymers and Small Molecules: The Role of Nonbonding Interactions
journal, May 2013


Synthesis, Electronic Structure, Molecular Packing/Morphology Evolution, and Carrier Mobilities of Pure Oligo-/Poly(alkylthiophenes)
journal, December 2012


The Chemistry of Conducting Polythiophenes
journal, January 1998


Effect of Molecular Weight on Spectroscopic and Spectroelectrochemical Properties of Regioregular Poly(3-hexylthiophene)
journal, July 1998


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