Chiroptical Properties of Glucose-Substituted Poly(<i>p</i>‑phenylene-ethynylene)s in Solution and Aggregate State

The aggregation behavior of two d-glucose-substituted phenyleneethynylenes, an alternate copolymer (<b>AP</b>) and a homooligomer (<b>HO</b>), has been investigated by means of UV–vis absorption, circular dichroism (CD) and fluorescence spectroscopy. CD reveals superior capability to detect the early stages of aggregation and to provide information about aggregate geometries. The multiband CD spectrum of the <b>AP</b> and of analogous chiral PPEs is rationalized on the basis of the exciton coupling between vibronic transitions localized on proximate portions of the chromophoric chains

Designing Small Molecules as Ternary Energy-Cascade Additives for Polymer:Fullerene Solar Cell Blends

Designing Small Molecules as Ternary Energy-Cascade Additives for Polymer:Fullerene Solar Cell Blend

Langmuir–Schaefer Films for Aligned Carbon Nanotubes Functionalized with a Conjugate Polymer and Photoelectrochemical Response Enhancement

Single-walled carbon nanotubes (SWCNTs) were suspended in 1,2-dichloroethane by noncovalent functionalization with a low-band-gap conjugated polymer <b>1</b> alternating dialkoxyphenylene–bisthiophene units with benzo­[<i>c</i>]­[2,1,3]­thiadiazole monomeric units. The suspended <b>1</b>/SWCNT blend was transferred onto different solid substrates by the Langmuir–Schaefer deposition method, resulting in films with a high percentage of aligned nanotubes. Photoelectrochemical characterization of <b>1</b>/SWCNT thin films on indium–tin oxide showed the benefits of SWCNT alignment for photoconversion efficiency