Structural and optical variation of pseudoisocyanine aggregates nucleated on DNA substrates.

ABSTRACT: Coherently coupled pseudoisocyanine (PIC) dye aggregates have demonstrated the ability to delocalize electronic excitations and ultimately migrate excitons with much higher efficiency than similar designs where excitations are isolated to individual chromophores. Here, we report initial evidence of a new type of PIC aggregate, formed through heterogeneous nucleation on DNA oligonucleotides, displaying photophysical properties that differ significantly from previously reported aggregates. This new aggregate, which we call the super aggregate (SA) due to the need for elevated dye excess to form it, is clearly differentiated from previously reported aggregates by spectroscopic and biophysical characterization. In emission spectra, the SA exhibits peak narrowing and, in some cases, significant

SUBMITTER: Chiriboga M 

PROVIDER: S-EPMC10362908 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature