Molla Islam - (1) Self assembly of rod-coil and coil-rod-coil pseudo block copolymers based on perylene tetracarboxylic diimide in aqueous and non-aqueous media and in bulk.

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      Publication Details (including relevant citation   information): Sundararajan, P. R., Islam, Molla   Rafiquel., Polym. Prepr. (Am. Chem. Soc., Div. Polym.   Chem.), 2011, 52 (2), pp 338-339

      Abstract: Amphiphilic pseudo block copolymer   systems can be designed with photoconductors (as applicable to   optoelectronics) as part of a rod-coil copolymer. The di-block   and triblock copolymers with perylenebisimide and Jeffamine   enable the aggregation of the chromophores in aq. media. the mode   of aggregation is dilTerent between MJ-PTCDI and DJ-PTCDI, and   the extent of aggregation can be modified by solvent mixts. Aging   of the solns. leads to predominantly one-dimensional coalescence   into fibers. with PTCD1 substituted on both sides with   polystyrene, PS-PTCDI-PS does not show self assembly of the   perylene segment in any of the solvents that dissolve   polystyrene. We attribute this behavior to the C-H interaction   between the Ph groups of the polystyrene segment and PTCDI, when   the polystyrene segment is in an extended conformation (good   solvent). Collapsing the polystyrene segment by adding a   non-solvent (water or methanol) eliminates the C-H interaction   and enables the stacking of PTCDI segment in neighboring mols.   These rod-coil systems would also be a route to prepn. of polymer   dispersed aggregate photoconductors. [on SciFinder(R)]

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