Structural studies of the self-assemblies created with dipyrrins.

Three-dimensional superstructures of unique self-assemblies generated by exploring the conformational flexibility of various dipyrromethenes through creation of hydrogen-bonds with metal-halide anions are reported and the conformational diversity is thoroughly described in the solid and soln. states by X-ray diffraction anal. and variable temp. NMR spectroscopy. The tetrahedral or octahedral structures of their precursors, various metal-dipyrromethene complexes, are also reported, based on the crystallog. data. STM images of the self-assemblies obsd. on graphite surfaces present interesting arrangements and appear as tubular bunches. [on SciFinder(R)]