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Chloride Ligands on DNA-Stabilized Silver Nanoclusters

[Image: see text] DNA-stabilized silver nanoclusters (Ag(N)-DNAs) are known to have one or two DNA oligomer ligands per nanocluster. Here, we present the first evidence that Ag(N)-DNA species can possess additional chloride ligands that lead to increased stability in biologically relevant concentrat...

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Autores principales: Gonzàlez-Rosell, Anna, Malola, Sami, Guha, Rweetuparna, Arevalos, Nery R., Matus, María Francisca, Goulet, Meghen E., Haapaniemi, Esa, Katz, Benjamin B., Vosch, Tom, Kondo, Jiro, Häkkinen, Hannu, Copp, Stacy M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10197127/
https://www.ncbi.nlm.nih.gov/pubmed/37155337
http://dx.doi.org/10.1021/jacs.3c01366
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author Gonzàlez-Rosell, Anna
Malola, Sami
Guha, Rweetuparna
Arevalos, Nery R.
Matus, María Francisca
Goulet, Meghen E.
Haapaniemi, Esa
Katz, Benjamin B.
Vosch, Tom
Kondo, Jiro
Häkkinen, Hannu
Copp, Stacy M.
author_facet Gonzàlez-Rosell, Anna
Malola, Sami
Guha, Rweetuparna
Arevalos, Nery R.
Matus, María Francisca
Goulet, Meghen E.
Haapaniemi, Esa
Katz, Benjamin B.
Vosch, Tom
Kondo, Jiro
Häkkinen, Hannu
Copp, Stacy M.
author_sort Gonzàlez-Rosell, Anna
collection PubMed
description [Image: see text] DNA-stabilized silver nanoclusters (Ag(N)-DNAs) are known to have one or two DNA oligomer ligands per nanocluster. Here, we present the first evidence that Ag(N)-DNA species can possess additional chloride ligands that lead to increased stability in biologically relevant concentrations of chloride. Mass spectrometry of five chromatographically isolated near-infrared (NIR)-emissive Ag(N)-DNA species with previously reported X-ray crystal structures determines their molecular formulas to be (DNA)(2)[Ag(16)Cl(2)](8+). Chloride ligands can be exchanged for bromides, which red-shift the optical spectra of these emitters. Density functional theory (DFT) calculations of the 6-electron nanocluster show that the two newly identified chloride ligands were previously assigned as low-occupancy silvers by X-ray crystallography. DFT also confirms the stability of chloride in the crystallographic structure, yields qualitative agreement between computed and measured UV–vis absorption spectra, and provides interpretation of the (35)Cl-nuclear magnetic resonance spectrum of (DNA)(2)[Ag(16)Cl(2)](8+). A reanalysis of the X-ray crystal structure confirms that the two previously assigned low-occupancy silvers are, in fact, chlorides, yielding (DNA)(2)[Ag(16)Cl(2)](8+). Using the unusual stability of (DNA)(2)[Ag(16)Cl(2)](8+) in biologically relevant saline solutions as a possible indicator of other chloride-containing Ag(N)-DNAs, we identified an additional Ag(N)-DNA with a chloride ligand by high-throughput screening. Inclusion of chlorides on Ag(N)-DNAs presents a promising new route to expand the diversity of Ag(N)-DNA structure–property relationships and to imbue these emitters with favorable stability for biophotonics applications.
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spelling pubmed-101971272023-05-20 Chloride Ligands on DNA-Stabilized Silver Nanoclusters Gonzàlez-Rosell, Anna Malola, Sami Guha, Rweetuparna Arevalos, Nery R. Matus, María Francisca Goulet, Meghen E. Haapaniemi, Esa Katz, Benjamin B. Vosch, Tom Kondo, Jiro Häkkinen, Hannu Copp, Stacy M. J Am Chem Soc [Image: see text] DNA-stabilized silver nanoclusters (Ag(N)-DNAs) are known to have one or two DNA oligomer ligands per nanocluster. Here, we present the first evidence that Ag(N)-DNA species can possess additional chloride ligands that lead to increased stability in biologically relevant concentrations of chloride. Mass spectrometry of five chromatographically isolated near-infrared (NIR)-emissive Ag(N)-DNA species with previously reported X-ray crystal structures determines their molecular formulas to be (DNA)(2)[Ag(16)Cl(2)](8+). Chloride ligands can be exchanged for bromides, which red-shift the optical spectra of these emitters. Density functional theory (DFT) calculations of the 6-electron nanocluster show that the two newly identified chloride ligands were previously assigned as low-occupancy silvers by X-ray crystallography. DFT also confirms the stability of chloride in the crystallographic structure, yields qualitative agreement between computed and measured UV–vis absorption spectra, and provides interpretation of the (35)Cl-nuclear magnetic resonance spectrum of (DNA)(2)[Ag(16)Cl(2)](8+). A reanalysis of the X-ray crystal structure confirms that the two previously assigned low-occupancy silvers are, in fact, chlorides, yielding (DNA)(2)[Ag(16)Cl(2)](8+). Using the unusual stability of (DNA)(2)[Ag(16)Cl(2)](8+) in biologically relevant saline solutions as a possible indicator of other chloride-containing Ag(N)-DNAs, we identified an additional Ag(N)-DNA with a chloride ligand by high-throughput screening. Inclusion of chlorides on Ag(N)-DNAs presents a promising new route to expand the diversity of Ag(N)-DNA structure–property relationships and to imbue these emitters with favorable stability for biophotonics applications. American Chemical Society 2023-05-08 /pmc/articles/PMC10197127/ /pubmed/37155337 http://dx.doi.org/10.1021/jacs.3c01366 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Gonzàlez-Rosell, Anna
Malola, Sami
Guha, Rweetuparna
Arevalos, Nery R.
Matus, María Francisca
Goulet, Meghen E.
Haapaniemi, Esa
Katz, Benjamin B.
Vosch, Tom
Kondo, Jiro
Häkkinen, Hannu
Copp, Stacy M.
Chloride Ligands on DNA-Stabilized Silver Nanoclusters
title Chloride Ligands on DNA-Stabilized Silver Nanoclusters
title_full Chloride Ligands on DNA-Stabilized Silver Nanoclusters
title_fullStr Chloride Ligands on DNA-Stabilized Silver Nanoclusters
title_full_unstemmed Chloride Ligands on DNA-Stabilized Silver Nanoclusters
title_short Chloride Ligands on DNA-Stabilized Silver Nanoclusters
title_sort chloride ligands on dna-stabilized silver nanoclusters
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10197127/
https://www.ncbi.nlm.nih.gov/pubmed/37155337
http://dx.doi.org/10.1021/jacs.3c01366
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