A Dinuclear Osmium(II) Complex Near-Infrared Nanoscopy Probe for Nuclear DNA
Journal article
Authors | Dröge, F., Noakes, F.F., Archer, S.A., Sreedharan, S., Raza, A., Robertson, C.C., MacNeil, S., Haycock, J.W., Carson, H., Meijer, A.J. and Smythe, C.G. |
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Abstract | With the aim of developing photostable near-infrared cell imaging probes, a convenient route to the synthesis of heteroleptic OsII complexes containing the Os(TAP)2 fragment is reported. This method was used to synthesize the dinuclear OsII complex, [{Os(TAP)2}2tpphz]4+ (where tpphz = tetrapyrido[3,2-a:2′,3′-c:3″,2′′-h:2‴,3′′′-j]phenazine and TAP = 1,4,5,8- tetraazaphenanthrene). Using a combination of resonance Raman and time-resolved absorption spectroscopy, as well as computational studies, the excited state dynamics of the new complex were dissected. These studies revealed that, although the complex has several close lying excited states, its near-infrared, NIR, emission (λmax = 780 nm) is due to a low-lying Os → TAP based 3MCLT state. Cell-based studies revealed that unlike its RuII analogue, the new complex is neither cytotoxic nor photocytotoxic. However, as it is highly photostable as well as live-cell permeant and displays NIR luminescence within the biological optical window, its properties make it an ideal probe for optical microscopy, demonstrated by its use as a super-resolution NIR STED probe for nuclear DNA. |
Keywords | nuclear DNA; optical microscopy; near-infrared cell imaging probes |
Year | 2021 |
Journal | Journal of the American Chemical Society |
Journal citation | 143 (48), p. 20442–20453 |
Publisher | American Chemical Society |
ISSN | 1520-5126 |
Digital Object Identifier (DOI) | https://doi.org/10.1021/jacs.1c10325 |
Web address (URL) | https://eprints.whiterose.ac.uk/185761/1/OsOsTAP%205%2011%2021.pdf |
https://pubs.acs.org/doi/10.1021/jacs.1c10325# | |
Output status | Published |
Publication dates | |
Online | 22 Nov 2021 |
Publication process dates | |
Deposited | 12 Jul 2024 |
https://repository.derby.ac.uk/item/q73z9/a-dinuclear-osmium-ii-complex-near-infrared-nanoscopy-probe-for-nuclear-dna
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