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Enhancement of the Molecular Ordering via the Polymerization of 3,4‐Ethylenedioxythiophene‐Based Two‐Monomer‐Connected Precursor with 4,4‐Biphenyldisulfonic Acid
Author(s) -
Kim Wonbin,
Lee HongJoon,
Lee Hannui,
Yoo Seung Jo,
Lee JaeSuk
Publication year - 2020
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.202000019
Subject(s) - crystallinity , monomer , polymerization , polymer chemistry , methanesulfonic acid , bifunctional , sulfonic acid , materials science , dopant , orthorhombic crystal system , polymer , crystal structure , chemistry , crystallography , organic chemistry , doping , optoelectronics , composite material , catalysis
The polymerization of 3,4‐ethylenedioxythiophene (EDOT)‐based two‐monomer‐connected precursors in various solvent systems leads to improved crystallinity, compared to poly(3,4‐ethylenedioxythiophene) synthesized from traditional route. The P(EDOT:BPDSA:EDOT) is ordered by using 4,4‐biphenyldisulfonic acid (BPDSA) that is a connector and dopant linking EDOT monomers. The crystallinity, measured from X‐ray diffraction studies, is increased when using short chain or hydrophobic solvents. The crystallinity of P(EDOT:BPDSA:EDOT) significantly increases up to 45.0% compared to polymer with other sulfonic acids, bifunctional 1,2‐ethanesulfonic acid, and monofunctional methanesulfonic acid (MSA). The crystal structure is also confirmed from high‐voltage electron microscope. From these studies, it is confirmed that P(EDOT:BPDSA:EDOT) has an orthorhombic structure, which has the unit cell lattice parameters of a = 1.44 nm, b = 0.98 nm, and c = 1.18 nm from fast Fourier transform pattern images. The electrical conductivity is increased about four times with BPDSA (0.21 S cm −1 ) when compared using MSA (0.06 S cm −1 ).