Work

Nonradiative Deactivation of the Fluorescent Ag16-DNA and Ag10-DNA Emitters: The Role of Water

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide The luminescent quantum yield of silver-cluster emitters stabilized by short oligonucleotides (Ag N -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 N -DNA emitters after excitation. Using green Ag 10 -DNA and near-IR Ag 16 -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 16 -DNA is intersystem crossing, which is in line with experimental data, whereas for Ag 10 -DNA the calculations overestimate the intersystem crossing rate possibly due to pure solvent contributions.

Source: The Journal of Physical Chemistry Letters

DOI: 10.1021/acs.jpclett.4c01959

Authors: Ruslan R. Ramazanov, Rinat T. Nasibullin, Dage Sundholm, Theo Kurtén, Rashid R. Valiev

Institution: University of Helsinki

Language: English

Topic: Nanocluster Synthesis and Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,500

Funder: Academy of Finland