Intramolecular Charge Transfer and Ultrafast Nonradiative Decay in DNA-Tethered Asymmetric Nitro- and Dimethylamino-Substituted Squaraines.
Journal
The journal of physical chemistry. A
ISSN: 1520-5215
Titre abrégé: J Phys Chem A
Pays: United States
ID NLM: 9890903
Informations de publication
Date de publication:
09 Feb 2023
09 Feb 2023
Historique:
pubmed:
28
1
2023
medline:
28
1
2023
entrez:
27
1
2023
Statut:
ppublish
Résumé
Molecular (dye) aggregates are a materials platform of interest in light harvesting, organic optoelectronics, and nanoscale computing, including quantum information science (QIS). Strong excitonic interactions between dyes are key to their use in QIS; critically, properties of the individual dyes govern the extent of these interactions. In this work, the electronic structure and excited-state dynamics of a series of indolenine-based squaraine dyes incorporating dimethylamino (electron donating) and/or nitro (electron withdrawing) substituents, so-called asymmetric dyes, were characterized. The dyes were covalently tethered to DNA Holliday junctions to suppress aggregation and permit characterization of their monomer photophysics. A combination of density functional theory and steady-state absorption spectroscopy shows that the difference static dipole moment (Δ
Identifiants
pubmed: 36705555
doi: 10.1021/acs.jpca.2c06442
pmc: PMC9923757
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1141-1157Références
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