Supramolecular anion coordination networks with (6.3) cation-templated topologies

1 etc. We are looking in particular for supramolecular organization in mixed crystals that can modify centrosymmetric structure of pure material into acentric structure of host-guest compound. Such approach can help to alter organization of strongly polarized donoracceptor molecules in crystals and make them useful for applications as optoelectronic materials. In the mixed crystals of I and II organic components are benzene derivatives such as isomers of nitrotoluene, low-melting or liquid at room temperature. Crystal growth of these materials has been done using zone melting technique and molecular structure of these materials in pure compounds was compared with their structures in mixed crystals. It was found that number of acentric crystals in the series mixed crystals of I with nitrobenzene derivatives is higher than statistical expectation. Explanation of this phenomenon can be found in specific intermolecular interactions forming supramolecular associates in these materials.