On the Chemical Stability of DNA-Stabilized Silver Nanoclusters.

ABSTRACT: DNA-stabilized silver nanoclusters (DNA-AgNCs) are atomically precise emitters, whose chemical stability is commonly defined by their stable optical response over time. Here, two isotopically pure versions (¹⁰⁷Ag and ¹⁰⁹Ag) of DNA₂-[Ag₁₆Cl₂]⁸⁺ were mixed, and we demonstrate for the first time for DNA-AgNCs that silver atoms are continuously exchanged between individual clusters. This atom exchange was monitored by time-resolved mass spectrometry. Depending on the temperature, the exchange happens on a time scale of minutes to hours, while DNA₂-[Ag₁₆Cl₂]⁸⁺ retains its ensemble spectroscopic features. Based on the time constants and the available crystal structure, we hypothesized th

SUBMITTER: Romolini G 

PROVIDER: S-EPMC11603216 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature