TY - JOUR A1 - Dähne, Siegfried A1 - v.Berlepsch, H. A1 - Böttcher, C. A1 - Quart, A. A1 - Burger, C. A1 - Kirstein, S. T1 - Supramolecular Structures of J-Aggregates of Carbocyanine Dyes in Solution JF - The journal of physical chemistry / B N2 - Light- and small-angle neutron scattering as well as cryo-transmission electron microscopy (cryo-TEM) studies were performed to probe the structure of J-aggregates formed by a series of achiral dye molecules of the 5,5',6,6'-tetrachlorobenzimidacarbocyanine chromophore having 1,1'-dialkyl substituents combined with 3,3'-bis(4-sulfobutyl)-3,3'-bis(4-carboxybutyl) or 3,3'-bis(3-carboxypropyl) substituents. Assemblies that display a dependence on the substituents different complex supramolecular structures of nanometer-to-micrometer size have been directly visualized by cryo-TEM. The superstructures span from monomolecular layers formed by the 1,1'-diethyl-3,3'-bis(4-sulfobutyl) derivative and stacks of bilayer ribbons in the case of the 1,1'-dioctyl-3,3'-bis(4-carboxybutyl) derivative to twisted ropelike structures for the chiral aggregate of the 1,1'-dioctyl-3,3'-bis(3-carboxypropyl)-substituted chromophore. PY - 2000 DO - https://doi.org/10.1021/jp000220z SN - 1520-6106 SN - 1520-5207 SN - 1089-5647 VL - 104 IS - 22 SP - 5255 EP - 5262 PB - Soc. CY - Washington, DC AN - OPUS4-862 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -