Suzuki Polycondensation

Learning how to create large supramolecular units through molecular design and to elucidate the rules mediating macroscopic organization into functional materials will offer a fascinating prospect for technology. Great attention on self-assembly throughout the 90s has generated very useful knowledge on the construction of highly complex molecules based on noncovalent links, which makes it an essential part of nanotechnology.

Studies of supramolecular chemistry are currently dominated by the biomimetic motive of weak interactions such as hydrogen bonding, p -p stacking, electrostatic and van der Waals forces, hydrophobic and hydrophilic interactions, etc. The recent elegant investigations based on this bio-derived motive were illustrated, i.e., by the noncovalent synthesis of "rosette" aggregates and two- and three-dimensional self-assemblies of mesoscale objects by
Whitesides, the synthesis of self-organized nanostructures by Stupp, the preparation of nanoporous molecular sandwiches by Ward, the equilibrium-controlled self-assembling dendrimers by Zimmerman, and many others.

The creation of complex structures is generally easiest with rigid structural elements (straight beams), and the molecular rods are considered as construction elements in supra-molecular assemblies and giant molecules. Nature achieves rigid shape-persistent structures through the aggregation of molecular building blocks. Many biogenic polymers are electrolyte of wormlike, that is semi-rigid, and the ability of biopolymers to form highly ordered
structures by self-assembly is fundamental to their biological function. Examples include DNA existed as a double helix of two strands, and the RNA-templated aggregation of proteins that forms the structure of tobacco mosaic virus. Understanding and controlling the parameters that determine the structure formation process is of major current interest. Because of chemical simplicity and the possibility to selectively modify the chemical structure,
synthetic stiff chain polymers are most promising systems to model the complete properties of biopolymers. Therefore, widespread studies in rigid-rod molecules have been of considerable interest in science.