Synthesis and characterization of copolythiophene

Abstract

Copolythiophenes (Co-PTs), poly(3-hexylthiophene-co-3-thiophene carboxylic acid) (P3HT-TCa), poly(3-hexyloxylthiophene-co-3-thiophene carboxylic acid) (P3HOT-TCa), and poly(3-phenylthiophene-co-3-thiophene carboxylic acid) (P3PhT-TCa), were synthesized by chemical oxidized polymerization to investigate the effect of copolymerization on the properties of polythiophenes (PTs). Gel permeation chromatography showed that the molecular weight (MW) of Co-PT was lower than that of homopolythiophene. Fourier transform infrared (FTIR) spectra indicated that the copolymerization was successful between the monomers. The l max of Co-PTs gave a ''blue shift'' in ultraviolet-visible (UV-VIS) spectra. Photoluminescence (PL) spectra showed that the PL intensity of Co-PT became weaker than that of homopolythiophene and the disappearance of PL had been observed in P3HOT-TCa. The thermal stability of Co-PT was influenced by the carboxyl for its low decomposition temperature. Furthermore, the copolymerization between multiwall carbon nanotube containing thiophene ring (MWNTTh) and 3-hexyloxylthiphene could also take place successfully.

Synthesis and Supramolecular Organization of Regioregular Polythiophene Block Oligomers

“…In the solid state (Figure S15 in Supporting Information), the λ max in the 400−450 nm of the two co-oligomers 5 and 6 are red-shifted respectively by about 40 nm, as compared to the values in solution. This band attributed to the π−π* interband transition of unsaturated bonds in polythiophenes is very sensitive to the effective conjugation length . Indeed, the confinement of the polymer chains in the condensed phase is anticipated to support a planar arrangement of the adjacent thiophene rings and to enhance the delocalization of electrons within phenyl groups and the polythiophene backbone.…”

Structural and thermal properties of carboxylic acid functionalized polythiophenes

“…For example, the poly(3-alkylthiophene)s (PAT) are common polythiophene derivatives that have been the subject of intense research and development over the last years to be used in numerous device applications [8][9][10] . Current researches have been focused on improving the performance of polythiophene-based devices by the synthesis of new polythiophene derivatives and by the control of their regioregularity [11][12][13][14][15] . In addition, very efficient devices have also been obtained by mixing the polythiophene derivatives and electron acceptor compounds, such as titania, silica and fullerenes [16][17][18][19][20][21] .…”

New anthracene‐containing phenylene‐ or thienylene‐vinylene copolymers: Synthesis, characterization, photophysics, and photovoltaics

“…TAT showed the most blue‐shifted λ f ,max among the four copolymers because it has one hexyl per repeating unit instead of the two hexyloxy groups. It has been well established that the hexyloxys were more efficient electron‐donating groups than the hexyl groups 45 . PAP6 and PAT displayed λ f ,max at 502 and 518 nm, respectively, which is in line with their λ a ,max in thin film (Table II).…”