{
  "abstract": "Luminescent organic diradicals based on tris(2,4,6-trichlorophenyl)methyl (TTM) radicals have shown promise as optical-spin interfaces important for quantum sensing. The optically driven spin polarization mechanisms of existing TTM diradicals remain limited by non-selective singlet-triplet intersystem crossing (ISC) pathways, which restrict optically detected magnetic resonance (ODMR) contrast. Two TTM-based diradicals were prepared in which the two TTM subunits are linked at the para positions of one of their phenyls. Fully substituting the resulting biphenyl linkage between the radical centers with chlorines gives diradical 1, in which the two phenyls constituting the linkage are nearly orthogonal to one another. Subsequent replacement of the remaining four para positions of the TTM phenyls with p-tolyl groups gives diradical 2. Following photoexcitation of these diradicals to their triplet excited states, they undergo symmetry-breaking charge transfer to form a diamagnetic ion pair followed by charge recombination to form a spinpolarized triplet state. Diradical 2 shows spin-selective intersystem crossing from the triplet excited state resulting in an ODMR spectrum, while diradical 1 does not. These results show that spin-selective decay channels from the triplet excited state are a necessary requirement for establishing a spin-optical interface in TTM-based diradicals.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "name": "Yixi Wang"
    },
    {
      "name": "Kathryn R. Peinkofer"
    },
    {
      "name": "Jonathan R. Palmer"
    },
    {
      "name": "Kyle T. Kairys"
    },
    {
      "name": "Rafael López-Arteaga"
    },
    {
      "name": "Ryan M. Young"
    },
    {
      "name": "Matthew D. Krzyaniak"
    },
    {
      "name": "Michael R Wasielewski",
      "orcid": "0000-0003-2920-5440"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/08bqm3kbygjye.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009671/v1",
  "fulltext_url": null,
  "id": "08bqm3kbygjye",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009671/v1",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2504|Magnetism in coordination complexes"
    ]
  ],
  "openalex": "W7214927277",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/08bqm3kbygjye.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:21Z",
      "native_id": "10.26434/chemrxiv.15009671",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009671/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2504|Magnetism in coordination complexes",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Establishing Optical-Spin Interfaces in Luminescent Organic Diradicals using Spin-selective Symmetry-breaking Charge Transfer",
  "title_text": "Establishing Optical-Spin Interfaces in Luminescent Organic Diradicals using Spin-selective Symmetry-breaking Charge Transfer",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:21Z",
  "url": "https://research.draconitic.com/paper/08bqm3kbygjye",
  "venue": "ChemRxiv",
  "versions": []
}