Nonradiative Deactivation of the Fluorescent Ag<sub>16</sub>-DNA and Ag<sub>10</sub>-DNA Emitters: The Role of Water
The luminescent quantum yield of silver-cluster emitters stabilized by short oligonucleotides (Ag<sub>N</sub>-DNA) may be efficiently tuned by replacing nucleobases in their stabilization DNA matrices with analogues. In the present study, we proposed a valuable and straightforward theoretical methodology for assessing the photophysical behaviors emerging in Ag<sub>N</sub>-DNA emitters after excitation. Using green Ag<sub>10</sub>-DNA and near-IR Ag<sub>16</sub>-DNA emitters we demonstrate how point guanine/inosine replacement could affect the photophysical rate constants of radiative/nonradiative processes. The main deactivation channel of the fluorescence of Ag<sub>16</sub>-DNA is intersystem crossing, which is in line with experimental data, whereas for Ag<sub>10</sub>-DNA the calculations overestimate the intersystem crossing rate possibly due to pure solvent contributions.
Authors
- Dage Sundholm (ORCID: https://orcid.org/0000-0002-2367-9277)
- Ruslan R. Ramazanov (ORCID: https://orcid.org/0000-0002-3019-8762)
- Rinat T. Nasibullin (ORCID: https://orcid.org/0000-0002-2218-1944)
- Theo Kurtén (ORCID: https://orcid.org/0000-0002-6416-4931)
- Rashid R. Valiev (ORCID: https://orcid.org/0000-0002-2088-2608)
Institutions
- University of Helsinki (FI)
Publication Details
- Journal
- The Journal of Physical Chemistry Letters
- Published
- 2024-10-17
- DOI
- https://doi.org/10.1021/acs.jpclett.4c01959
- Citations
- 11
- Primary Topic
- Nanocluster Synthesis and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.29
Funders
- Academy of Finland