Programmed self-assembly of largeπ-conjugated molecules into electroactive one-dimensional nanostructures

Abstract

Electroactive one-dimensional (1D) nano-objects possess inherent unidirectional charge and energy transport capabilities along with anisotropic absorption and emission of light, which are of great advantage for the development of nanometer-scale electronics and optoelectronics. In particular, molecular nanowires formed by self-assembly of π-conjugated molecules attract increasing attention for application in supramolecular electronics. This review introduces recent topics related to electroactive molecular nanowires. The nanowires are classified into four categories with respect to the electronic states of the constituent molecules: electron donors, acceptors, donor-acceptor pairs and miscellaneous molecules that display interesting electronic properties. Although many challenges still remain for practical use, state-of-the-art 1D supramolecular nanomaterials have already brought significant advances to both fundamental chemical sciences and technological applications.

Supramolecular block copolymers by kinetically controlled co-self-assembly of planar and core-twisted perylene bisimides

“…These nanowires are ultrathin with uniform diameter of 3–4 nm ( Fig. 4 ), and are among the thinnest organic nanowires ever revealed by electron microscopy 45 46 . These ‘single-molecule'-thin nanowires are also extraordinarily long up to 5 μm and display high aspect ratio.…”

Supramolecular scaffolds enabling the controlled assembly of functional molecular units

“…1 ). 1 – 9 , 45 – 49 1D scaffolds with a high aspect ratio can assemble and align functional units densely and anisotropically. Importantly, fibrous and tubular assemblies often possess helical chirality as a structural element.…”

Understanding the Driving Mechanisms of Enhanced Luminescence Emission of Oligo(styryl)benzenes and Tri(styryl)‐s‐triazine

“…[1][2][3][4][5][6][7][8][9][10][11][12] In-trinsicc haracteristics of molecules, such as size, shape, and noncovalent forces, added to external factors, such as concentration, environmental polarity,v iscosity,o rt emperature, govern the molecular arrangemento fa ggregates in the liquid phase. [2][3][4][5][6] In the solid state, these factors, linked to bulk material processing,d etermine the competition of multiplea ggregation pathways for molecularb uilding blocks (pathway complexity). [13] Leading the self-assembly of p-conjugated organic compounds is ac hallenging task that beginsw ith the studyo f intrinsica nd extrinsic factors that govern the molecular arrangementi nt he liquid phase, before bulk material processing.…”