α-Oligofurans: An Emerging Class of Conjugated Oligomers for Organic Electronics

Key factors in determining the arrangement of π-conjugated oligomers inside carbon nanotubes

Dispersion corrected DFT calculations found different arrangements of π-conjugated oligomers inside a carbon nanotube, dependent on the type of oligomer, which are responsible for determining the oligomers’ electronic properties.

Negishi coupling in the synthesis of advanced electronic, optical, electrochemical, and magnetic materials

Negishi coupling is an efficient and versatile tool for selective C–C bond formation in the synthesis of organic electronic, optical, electrochemical, and magnetic materials.

Supramolecular control of organic p/n-heterojunctions by complementary hydrogen bonding

The supramolecular structure of organic semiconductors (OSCs) is the key parameter controlling their performance in organic electronic devices, and thus methods for controlling their self-assembly in the solid state are of the upmost importance. Recently, we have demonstrated the co-assembly of p- and n-type organic semiconductors through a three-point hydrogen-bonding interaction, utilizing an electron-rich dipyrrolopyridine (P2P) heterocycle which is complementary to naphthalenediimides (NDIs) both in its electronic structure and H bonding motif. The hydrogen-bonding-mediated co-assembly between P2P donor and NDI acceptor leads to ambipolar co-crystals and provides unique structural control over their solid-state packing characteristics. In this paper we expand our discussion on the crystal engineering aspects of H bonded donor–acceptor assemblies, reporting three new single co-crystal X-ray diffraction structures and analyzing the different packing characteristics that arise from the molecular structures employed. Particular attention is given toward understanding the formation of the two general motifs observed, segregated and mixed stacks. Co-assembly of the donor and acceptor components into a single, crystalline material, allows the creation of ambipolar semiconductors where the mutual arrangement of p- and n-conductive channels is engineered by supramolecular design based on complementary H bonding.

Convenient access to readily soluble symmetrical dialkyl-substituted α-oligofurans

A combination of heteroatom directed lithiation/CuCl₂-induced homocoupling, Wittig olefination/Pd-catalyzed transfer hydrogenation followed by Suzuki–Miyaura or Stille cross-coupling enables convenient access to dialkyl-substituted α-oligofurans of potential interest for organic electronics.