Mueller Matrix Polarimetry on cyanine dye J-aggregates

Sam Clowes, Dora Rasadean, Tiberiu-M. Gianga, Tamás Jávorfi, Rohanah Hussain, Giuliano Siligardi, G. Dan Pantos

Research output: Contribution to journalArticlepeer-review

4 Citations (SciVal)

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.
Original languageEnglish
Article number1523
JournalMolecules
Volume28
Issue number4
DOIs
Publication statusPublished - 4 Feb 2023

Bibliographical note

Funding Information:
We thank the Engineering and Physical Sciences Research Council (EPSRC) DTA for SRC and DMR and Diamond Light Source for the beam time and instruments access to B23 beamline (SM29075 and SM31797).

Keywords

  • J-aggregates
  • Mueller matrix polarimetry
  • circular dichroism
  • cyanine dyes

ASJC Scopus subject areas

  • Drug Discovery
  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Physical and Theoretical Chemistry
  • Pharmaceutical Science
  • Organic Chemistry

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