Supramolecular One-Dimensional n/p-Nanofibers

Abstract

Currently, there is a broad interest in the control over creating ordered electroactive nanostructures, in which electron donors and acceptors are organized at similar length scales. In this article, a simple and efficient procedure is reported en-route towards the construction of 1D arrays of crystalline pristine C60 and phenyl-C61-butyric acid methyl ester (PCBM) coated onto supramolecular fibers based on exTTF-pentapeptides. The resulting n/p-nanohybrids have been fully characterized by a variety of spectroscopic (FTIR, UV-Vis, circular dichroism, Raman and transient absorption), microscopic (AFM, TEM, and SEM), and powder diffraction (X-ray) techniques. Our experimental findings document the tendency of electroactive exTTF-fibers to induce the crystallization of C60 and PCBM, on one hand, and to afford 1D n/p-nanohybrids, on the other hand. Furthermore, photogenerated radical ion pairs, formed upon visible light irradiation of the n/p-nanohybrids, feature lifetimes on the range of 0.9–1.2 ns.

Formation of Semiconducting Supramolecular Fullerene Aggregates in a Dipeptide Organogel

“…[24][25][26] Fullerene is an electron-acceptor, and its composite with electron rich molecules create donor-acceptor heterojunctions which play a crucial role in organic electronic devices. [27][28][29][30] Fullerenes exhibit different aggregation patterns in different donor medium and experimental conditions, resulting in diverse nanostructures while retaining their optoeletronic properties. [31][32][33][34][35] Therefore, there is an increasing trend amongst material scientists to discover de novo hybrids of fullerenes and π-conjugated systems.…”

“…Therefore, there is an increasing trend amongst material scientists to discover de novo hybrids of fullerenes and π‐conjugated systems . As fullerenes exhibit affinity toward gelators with aromatic groups or π‐conjugation, many researchers have demonstrated the interactions between supramolecular π‐gels and fullerene . Ajayaghosh and co‐workers reported the crystallization of fullerene (C 60 ) to supramolecular rods with increased photoconductivity in a oligo( p ‐phenylenevinylene) based organogel .…”

Programmed Hierarchical Hybrid Nanostructures from Fullerene‐Dendrons and Pyrene‐Dendrons

“…Chemically introduced LC dendrons, which show the self‐assembling ability and the structural anisotropy, are expected to control the well‐defined hierarchical nanostructures from unit cells to multilayer microdomains . Charge transfer complex determined by the shape and physical properties of the molecules is the main driving force that influences the host–guest binding and the molecular self‐assembly . Consequentially, efforts to understand the relationship between structural origins can allow us to construct the hierarchical nanostructures of C 60 ‐based functional molecules.…”

“…[40,41] Charge transfer complex determined by the shape and physical properties of the molecules is the main driving force that influences the host-guest binding and the molecular self-assembly. [42][43][44][45] Consequentially, efforts to understand the relationship between structural origins can allow us to construct the hierarchical nanostructures of C 60 -based functional molecules.Hierarchical nanostructures of C 60 and its derivatives can be controlled by manipulating the chemical structure of guest molecules with help of host tweezer molecules. To demonstrate this concept, monofunctionalized C 60 dendron (C 60 D, guest) was newly designed and synthesized in this research by attaching three biphenyl-based LC groups.…”

“…[40,41] Charge transfer complex determined by the shape and physical properties of the molecules is the main driving force that influences the host-guest binding and the molecular self-assembly. [42][43][44][45] Consequentially, efforts to understand the relationship between structural origins can allow us to construct the hierarchical nanostructures of C 60 -based functional molecules.…”