Mueller Matrix Polarimetry on cyanine dye J-aggregates

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

doi:10.3390/molecules28041523

Mueller Matrix Polarimetry on cyanine dye J-aggregates

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

Diamond Light Source Ltd

Research output: Contribution to journal › Article › peer-review

9 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 language	English
Article number	1523
Journal	Molecules
Volume	28
Issue number	4
DOIs	https://doi.org/10.3390/molecules28041523
Publication status	Published - 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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10.3390/molecules28041523Licence: CC BY

Cite this

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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.",

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AU - Rasadean, Dora

AU - Gianga, Tiberiu-M.

AU - Jávorfi, Tamás

AU - Hussain, Rohanah

AU - Siligardi, Giuliano

AU - Pantos, G. Dan

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N2 - 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.

AB - 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.

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KW - circular dichroism

KW - cyanine dyes

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Mueller Matrix Polarimetry on cyanine dye J-aggregates

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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