Abstract
We report a solvent-assisted increase in the emission of a cationic perylene diimide derivative, which is water-soluble in nature. Favorably, all the emission-assisting solvents used in all the experiments are water-miscible such as ethanol, tetrahydrofuran (THF), or dimethyl sulfoxide (DMSO). The preliminary assumption of associated fluorescent assembly of perylene stacks (via spectroscopic analysis) has been further explored with dynamic light scattering (DLS), nuclear magnetic resonance (NMR), X-ray diffraction (XRD), and time-correlated single photon counting (TCSPC) techniques. Spectroscopically observed drastic enhancement in the emission intensity seems to be born out of a major change in the assembly pattern of the interacting hydrophobic surfaces of perylene derivatives. These changes further have a macroscopic impact on the DLS or powder XRD outcomes. Furthermore, molecular dynamics simulations have been performed to interpret the nature of aggregation of perylene oligomers in water and in an et...
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