Title
Synthesis, Characterization and Aggregation Behaviour of Room Temperature Ionic Liquid Based on Porphyrin- trihexyl(tetradecyl)Phosphonium Adduct
Author
R. Zagami, M. Trapani, M.A. Castriciano, A. Romeo, P.G. Mineo, L. Monsù Scolaro
Year
2016
Journal
Journal of Molecular Liquids
Abstract
A room temperature ionic liquid (RT-IL) made by the negatively charged water soluble meso-tetrakis(4 sulfonatophenyl)porphyrin (TPPS4) and the positively charged trihexyl(tetradecyl)phosphonium (CYPHOS® IL 101) has been synthesized and fully characterized by NMR, MALDI-TOF, differential scanning calorimetry and thermogravimetric analyses. Moreover, the growth of nanosized porphyrin J-aggregates have been induced in solution through the ”in situ” photogeneration of HCl acid in chlorinated solvent as well as the addition in solution of a strong chiral acid. In this latter case supramolecular chiral induction has been observed on the resulting emissive nanosized aggregates. The data reported clearly evidence the central role of trihexyl(tetradecyl)phosphonium (THTDP) counter-cation in i) determining the monomeric nature of the adduct in chlorinate solution, and ii) in limiting the size of the aggregates on a nanometric scale.
Instrument
J-720
Keywords
Circular dichroism, Aggregation, Nanostructures, Materials