A1 Journal article (refereed)
Theoretical Analysis of the Electronic Structure and Optical Properties of DNA-Stabilized Silver Cluster Ag16Cl2 in Aqueous Solvent (2023)
Malola, S., Matus, M. F., & Häkkinen, H. (2023). Theoretical Analysis of the Electronic Structure and Optical Properties of DNA-Stabilized Silver Cluster Ag16Cl2 in Aqueous Solvent. Journal of Physical Chemistry C, 127(33), 16553-16559. https://doi.org/10.1021/acs.jpcc.3c04103
JYU authors or editors
Publication details
All authors or editors: Malola, Sami; Matus, María Francisca; Häkkinen, Hannu
Journal or series: Journal of Physical Chemistry C
ISSN: 1932-7447
eISSN: 1932-7455
Publication year: 2023
Publication date: 09/08/2023
Volume: 127
Issue number: 33
Pages range: 16553-16559
Publisher: American Chemical Society (ACS)
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1021/acs.jpcc.3c04103
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/88788
Abstract
DNA-stabilized silver nanoclusters with 10–30 silver atoms are by construction ideal candidates for biocompatible bright fluorescent emitters, but their electronic structure is not well understood. Here, using density functional theory (DFT), we analyze the ground-state electronic structure and optical absorption of a bright NIR-emitting cluster Ag16Cl2, which is stabilized by two DNA strands of 9-base sequence 5′-CACCTAGCG-3′ and whose atomic structure was very recently confirmed to have two chlorides bound to the silver core. We are able to (i) unambiguously assign the charge of this cluster in aqueous solvent, (ii) analyze the details of silver–DNA interactions and their effect on the cluster charge, (iii) analyze the character of low-energy optical absorption peaks and the involved electron orbitals and make a first assessment on circular dichroism, and (iv) evaluate the suitability of various DFT exchange–correlation functionals via benchmarking to experimental optical data. This work lays out a baseline for all future theoretical work to understand the electronic, chiroptical, and fluorescence properties of these fascinating biocompatible nanostructures.
Free keywords: genetics; metal clusters; optical absorption; silver; solvents
Contributing organizations
Ministry reporting: Yes
VIRTA submission year: 2023
JUFO rating: 2
