Electronically Perturbed Vibrational Excitations of the Luminescing Stable Blatter Radical

Stable radicals are spin-active species with a plethora of proposed applications in fields from energy storage and molecular electronics to quantum communications. However, their optical properties and vibrational modes are so far not well understood. Furthermore, it is not yet clear how these are affected by the radical oxidation state, which is key to understanding their electronic transport. Here, we identify the properties of 1,2,4-benzotriazin-4-yl, a stable doubly thiolated variant of the Blatter radical, using surface-enhanced Raman scattering (SERS). Embedding molecular monolayers in plasmonic nanocavities gives access to their vibrational modes, photoluminescence, and optical response during redox processes. We reveal the influence of the adjacent metallic surfaces and identify fluctuating SERS signals that suggest a coupling between the unpaired radical electron and a spatially overlapping vibrational mode. This can potentially be exploited for information-storage devices and chemically designed molecular qubits.

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Publication Details

Journal
ACS Nano
Published
2025-02-21
DOI
https://doi.org/10.1021/acsnano.4c09661
Citations
2
Primary Topic
Molecular Junctions and Nanostructures
Type
article
Field-Weighted Citation Impact
1.46

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article

Electronically Perturbed Vibrational Excitations of the Luminescing Stable Blatter Radical

Sara Rocchetti, Sara Sangtarash, Niclas S. Mueller, Rebecca J. Salthouse et al.
2 citations
ACS Nano
Molecular Junctions and Nanostructures
1.46
article

Electronically Perturbed Vibrational Excitations of the Luminescing Stable Blatter Radical

Sara Rocchetti, Sara Sangtarash, Niclas S. Mueller, Rebecca J. Salthouse, Martin R. Bryce, Hatef Sadeghi, Abdalghani Daaoub, Ross J. Davidson, Sarah May Sibug‐Torres, Gyeongwon Kang, Jeremy J. Baumberg, Shangzhi Chen, Jonathan Bar-David, Chenyang Guo
article en
2 citations

Abstract

Stable radicals are spin-active species with a plethora of proposed applications in fields from energy storage and molecular electronics to quantum communications. However, their optical properties and vibrational modes are so far not well understood. Furthermore, it is not yet clear how these are affected by the radical oxidation state, which is key to understanding their electronic transport. Here, we identify the properties of 1,2,4-benzotriazin-4-yl, a stable doubly thiolated variant of the Blatter radical, using surface-enhanced Raman scattering (SERS). Embedding molecular monolayers in plasmonic nanocavities gives access to their vibrational modes, photoluminescence, and optical response during redox processes. We reveal the influence of the adjacent metallic surfaces and identify fluctuating SERS signals that suggest a coupling between the unpaired radical electron and a spatially overlapping vibrational mode. This can potentially be exploited for information-storage devices and chemically designed molecular qubits.

ACS NanoVol. 19(8)
Durham University (GB), University of Cambridge (GB), University of Warwick (GB), Bridge University (SS)
Engineering and Physical Sciences Research Council
Openalex Percentile: Top 19%
Molecular Junctions and Nanostructures
1.46
DOIOpen Access PDFOpenAlex
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