Mueller Matrix Polarimetry on Cyanine Dye J-Aggregates
Samuel R. Clowes, Dora M. Răsădean, Tiberiu‐Marius Gianga, Tamás Jávorfí, Rohanah Hussain, Giuliano Siligardi, G. Dan Pantoş
Abstract
Cyanine dyes are known to form H- and J-aggregates in aqueous solutions. Here we show that the cyanine dye, S0271, assembles in water into vortex induced chiral J-aggregates. The chirality of the J-aggregates depends on the directionality of the vortex. This study utilised both conventional benchtop CD spectropolarimeters and Mueller matrix polarimetry. It was found that J-aggregates have real chirality alongside linear dichroism and linear and circular birefringence. We identify the factors that are key to the formation of metastable chiral J-aggregates and propose a mechanism for their assembly.
Topics & Concepts
CyanineJ-aggregateMueller calculusChirality (physics)Circular dichroismPolarimetryMetastabilityChemical physicsBirefringenceChemistryMaterials scienceOpticsCrystallographyPhysicsOrganic chemistryMoleculeFluorescenceChiral symmetryScatteringQuantum mechanicsQuarkNambu–Jona-Lasinio modelSpectroscopy and Quantum Chemical StudiesLipid Membrane Structure and BehaviorPhotoreceptor and optogenetics research