Polythiophene-based conjugated polyelectrolyte: Optical properties and association behavior in solution

Salt-induced thermochromism of a conjugated polyelectrolyte

“…In water, CPT displays an unstructured broad absorption band peaking at 402 nm (3.08 eV), in agreement with a previous report. 53 A similar broad absorption (with maximum in the 440-450 nm region) is typically observed at room temperature for dilute P3HT solutions in good organic solvents such as chloroform, tetrahydrofuran or chlorobenzene. 7,9,11,14,19,21 In analogy to the P3HT data, we ascribe the absorption of aqueous CPT solution to an intrachain p-p* transition in polymer chains having disordered random-coil conformations.…”

“…This is consistent with a report revealing supramolecular assemblies in aqueous CPT solutions. 53 We note that those extremely large clusters, which we will refer to as loose agglomerates, do not necessarily have any spectroscopic significance, since they do not imply any close packing of the polymer backbones. Loose agglomerates with random-coil chain conformations also exist for P3HT at low concentration in good organic solvents.…”

“…S2 of the ESI † shows the dependence of the CPT absorption on the solvent refractive index). 53 When CPT is dissolved in the PBS buffer solution, the broad absorption band around 402 nm is much less pronounced; instead the spectrum is dominated by a redshifted absorption band with clear vibronic structure and peaks at 565 nm (2.19 eV, 0-0 transition), 525 nm (2.36 eV, 0-1 transition) and B495 nm (2.50 eV) (Fig. 1a).…”

Flexible and conductive multilayer films based on the assembly of PEDOT:PSS and water soluble polythiophenes

“…In the case of CPEs, their inherent amphilicity enables their self-assembly into ordered aggregates in both solution and solid phases [12][13][14]. Their self-assembly may also be manipulated by combining them with oppositely charged substances such as metal ions and complexes [15][16][17][18], DNA [19,20], surfactants [21][22][23] and polymers [24] for building complex supramolecular structures.…”

Conducting polymer: silver interface, morphology and properties

“…Incorporation of the side chains having ionic groups gives rise to new properties specific for polyelectrolytes. Polymeric materials that combine electrical conductivity of semiconductors with ionic conductivity of electrolytes are regarded to as conjugated polyelectrolytes [25][26][27][28].…”