Multicomponent Assembly Strategies for Supramolecular Systems
Engineered functional nanostructures with organic semiconducting materials, grown by self-assembly, are envisaged as a cheap and promising alternative to the expensive inorganic semiconductors used in conventional opto-electronic devices. The challenge is to design and synthesize adequate supramolecular structures. This requires a thorough understanding of two interrelated aspects: On the one hand are the self-assembly processes, to allow control of their crystalline structure. On the other hand are the electronic properties, to provide them with adequate functionality. Acquisition of such understanding has been the goal of countless investigations over recent decades, which are partly reviewed in this chapter. It describes the interactions driving molecular self-assembly and, most importantly, the strategies to steer it according to our needs toward systems with tailor-made crystalline and electronic structures. Particular emphasis is placed on multicomponent molecular blends, which increase the possibilities (and at the same time the complexity) of the supramolecular systems in terms of growth and structure, and also of their electronic properties and their ultimate functionality.