Solvent-Free Pd-Catalyzed Heteroaryl–Aryl Coupling via C–H Bond Activation for the Synthesis of Extended Heteroaromatic Conjugated Molecules

Direct arylation of thienopyrrolodione, diketopyrrolopyrroles, benzodithiophene derivatives, and fluorinated heteroarenes with functionalized aryl iodides is proven in solvent-free and non-anhydrous conditions. The reaction is performed in the presence of air and tolerates several functional groups on both the coupling partners, enabling a convenient synthesis of extended heteroaromatic conjugated molecules

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

Synthesis and Structure of Conjugated Molecules with the Benzofulvene Core

A general method to synthesize conjugated molecules with a benzofulvene core is reported. Up to four conjugated substituents have been introduced via a three-step sequence including (1) synthesis of 1,2-bis­(arylethynyl)­benzenes; (2) exo-dig electrophilic cyclization promoted by iodine; and (3) cross-coupling reaction of the resulting bis-iodobenzofulvenes with organoboron, organotin, or ethynyl derivatives under Pd catalysis. Structural aspects of the new compounds are discussed