Influence of Hydrophobicity on Excitonic Coupling in DNA-Templated Indolenine Squaraine Dye Aggregates
Olga A. Mass, Christopher K. Wilson, German Barcenas, Ewald Terpetschnig, Olena M. Obukhova, Olga S. Kolosova, Anatoliy L. Tatarets, Lan Li, Bernard Yurke, William B. Knowlton, Ryan D. Pensack, Jeunghoon Lee
Abstract
). In addition, we identified the sites for dye attachment in the DNA HJ that promote the closest spacing between the dyes in their dimers. The extracted aggregate geometries, and the role of electrostatic and steric effects in squaraine aggregation are also discussed. Taken together, these findings provide a deeper insight into how dye structures influence excitonic coupling in dye aggregates covalently templated via DNA, and guidance in design rules for exciton-based materials and devices.
Topics & Concepts
ExcitonDimerFluorescenceCovalent bondChemical physicsJ-aggregatePhotochemistryCoupling (piping)Steric effectsCircular dichroismChemistryMaterials scienceCrystallographyOpticsOrganic chemistryQuantum mechanicsMetallurgyPhysicsDNA and Nucleic Acid ChemistryAdvanced biosensing and bioanalysis techniquesLuminescence and Fluorescent Materials