The role of counter-anions in the kinetics and chirality of porphyrin J-aggregates

Abstract

Kinetics of the growth of TPPS₄ porphyrin J-aggregates slow down in the order H₂SO₄ > HCl > HBr > HNO₃ > HClO₄, in agreement with the Hofmeister series. The rate constants and the extent of chirality correlate with the structure-making or breaking abilities of the different anions with respect to the hydrogen bonding network of the solvent.