Mueller Matrix Polarimetry on Cyanine Dye J-Aggregates

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...

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Detalles Bibliográficos
Autores principales: Clowes, Samuel R., Răsădean, Dora M., Gianga, Tiberiu-M., Jávorfi, Tamás, Hussain, Rohanah, Siligardi, Giuliano, Pantoş, G. Dan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9960244/
https://www.ncbi.nlm.nih.gov/pubmed/36838510
http://dx.doi.org/10.3390/molecules28041523
Descripción
Sumario: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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