INCLUSIONS BETWEEN LARGE FLAT ORGANIC-MOLECULES - THE INDUCTION OF COLUMNS AND MESOPHASES

We describe here an overview on the formation of mesophases by the int eraction between large flat aromatic cored molecules and relatively sm all organic electron accepters which form stacked, sandwich-like colum nar pi-pi electron donor-acceptor complexes. The inclusion of suitable donor and acceptor components may be used to induce columnar mesophas es in mixtures of compounds which can be either mesomorphic or non-mes omorphic in the pure state. With judicious choice of donor and accepto r partners, induced mesophases of remarkable range and thermal stabili ty can be prepared.