Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

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

Chen, Junsheng ; Kumar, Ajeet ; Cerretani, Cecilia ; Vosch, Tom ; Zigmantas, Donatas LU orcid and Thyrhaug, Erling LU (2023) In Journal of Physical Chemistry Letters 14(17). p.4078-4083
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,... (More)

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 picture of the photoinduced dynamics. We expect the obtained model to contribute to guiding research efforts toward elucidating the electronic structure and dynamics of these novel objects and their potential applications in fluorescence-based labeling, imaging, and sensing.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry Letters
volume
14
issue
17
pages
6 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:37120843
  • scopus:85156203020
ISSN
1948-7185
DOI
10.1021/acs.jpclett.3c00764
language
English
LU publication?
yes
id
582d4e2b-6809-40a0-b1c3-a705310b9647
date added to LUP
2023-08-16 12:59:30
date last changed
2024-04-20 00:45:45
@article{582d4e2b-6809-40a0-b1c3-a705310b9647,
  abstract     = {{<p>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-Ag<sub>16</sub>NC) featuring NIR emission in combination with an unusually large Stokes shift of over 5000 cm<sup>-1</sup>. We follow the photoinduced dynamics of DNA-Ag<sub>16</sub>NC 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 picture of the photoinduced dynamics. We expect the obtained model to contribute to guiding research efforts toward elucidating the electronic structure and dynamics of these novel objects and their potential applications in fluorescence-based labeling, imaging, and sensing.</p>}},
  author       = {{Chen, Junsheng and Kumar, Ajeet and Cerretani, Cecilia and Vosch, Tom and Zigmantas, Donatas and Thyrhaug, Erling}},
  issn         = {{1948-7185}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{17}},
  pages        = {{4078--4083}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of Physical Chemistry Letters}},
  title        = {{Excited-State Dynamics in a DNA-Stabilized Ag<sub>16</sub> Cluster with Near-Infrared Emission}},
  url          = {{http://dx.doi.org/10.1021/acs.jpclett.3c00764}},
  doi          = {{10.1021/acs.jpclett.3c00764}},
  volume       = {{14}},
  year         = {{2023}},
}