Aggregates of Cyanine Dyes: When Molecular Vibrations and Electrostatic Screening Make the Difference.

ABSTRACT: Aggregates of cyanine dyes are currently investigated as promising materials for advanced electronic and photonic applications. The spectral properties of aggregates of cyanine dyes can be tuned by altering the supramolecular packing, which is affected by the length of the dye, the presence of alkyl chains, or the nature of the counterions. In this work, we present a joint experimental and theoretical study of a family of cyanine dyes forming aggregates of different types according to the length of the polymethinic chain. Linear and nonlinear optical spectra of aggregates are rationalized here in terms of an essential-state model accounting for intermolecular interactions together with the molecular polarizability and vibronic coupling. A strategy is implemented to properly account for scr

SUBMITTER: Bertocchi F 

PROVIDER: S-EPMC10240496 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature