Excited-State Dynamics in a DNA-Stabilized Ag₁₆ Cluster with Near-Infrared Emission.

ABSTRACT: Due to desirable optical properties, such as efficient luminescence and large Stokes shift, DNA-templated silver nanoclusters (DNA-AgNCs) have received significant attention over the past decade. Nevertheless, the excited-state dynamics of these systems are poorly understood, as studies of the processes ultimately leading to a fluorescent state are scarce. Here we investigate the early time relaxation dynamics of a 16-atom silver cluster (DNA-Ag₁₆NC) featuring NIR emission in combination with an unusually large Stokes shift of over 5000 cm^-1. We follow the photoinduced dynamics of DNA-Ag₁₆NC on time ranges from tens of femtoseconds to nanoseconds using a combination of ultrafast optical spectroscopies, and extract a kinetic model to clarify the physical pic

SUBMITTER: Chen J 

PROVIDER: S-EPMC10166082 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature