The supramolecular aggregation of three diimidazolium- functionalized perylene bisimides, differing in the alkyl chain length was investigated. These salts form aggregates in solvents like chloroform, dichloromethane, and glycerol. Solvent-, concentration-, and temperature-dependent spectroscopic studies were carried out, evidencing the occurrence of an isodesmic, enthalpy-driven aggregation process, underpinned by p–p stacking and hydrogen bonding. Moreover, dynamic light scattering (DLS) measurements and SEM images revealed that these salts aggregate in chloroform into elongated structures.
D'Anna, F., Marullo, S., Lazzara G, Vitale P, Noto R (2015). Aggregation processes of perylene bisimide diimidazolium salts. CHEMISTRY-A EUROPEAN JOURNAL, 21(21), 14780-14790 [10.1002/chem.201502240].
Aggregation processes of perylene bisimide diimidazolium salts
D'ANNA, Francesca;MARULLO, Salvatore;LAZZARA, Giuseppe;VITALE, Paola;NOTO, Renato
2015-01-01
Abstract
The supramolecular aggregation of three diimidazolium- functionalized perylene bisimides, differing in the alkyl chain length was investigated. These salts form aggregates in solvents like chloroform, dichloromethane, and glycerol. Solvent-, concentration-, and temperature-dependent spectroscopic studies were carried out, evidencing the occurrence of an isodesmic, enthalpy-driven aggregation process, underpinned by p–p stacking and hydrogen bonding. Moreover, dynamic light scattering (DLS) measurements and SEM images revealed that these salts aggregate in chloroform into elongated structures.
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