{
  "abstract": "Singlet fission (SF) can overcome efficiency limits in solar cells by converting one photon into two triplet excitons. Only a few organic chromophores, however, possess triplet energies compatible with Si- and GaAs-based semiconductors commonly used in photovoltaic devices. Peropyrene fulfills these energetic requirements, but excimer formation in its unsubstituted form stabilizes the singlet excited state. This lowers its energy below the threshold required for SF, necessitating control over intermolecular interactions. Contorting chromophores reduces their ability to achieve effective π-surface overlap with neighboring molecules, but the most common strategy, twisting, comes at the cost of a lower triplet energy. We overcome this trade-off by bending peropyrene into a bow via selective π-radical cascade reactions. This approach enables progressive deformation to the limit attainable with this method, a regime hitherto inaccessible by strategies developed for shorter and longer homologs. Bending reorganizes the solid-state crystal packing and reduces the extent of red-shifted emission in concentrated solution and in the solid state, consistent with reduced excimer stabilization. Calculations show a slight increase in triplet energy, desirable for improved compatibility with relevant semiconductors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "name": "Paula L. Widmer"
    },
    {
      "name": "Daniel Čavlović"
    },
    {
      "name": "Tara Matic"
    },
    {
      "name": "Olivier Blacque"
    },
    {
      "name": "Michal Juríček",
      "orcid": "0000-0001-5595-431X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fsjfbmddz8ygw.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009928/v1",
  "fulltext_url": null,
  "id": "fsjfbmddz8ygw",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009928/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",
      "2208|Organic Electronics and Photovoltaics"
    ]
  ],
  "openalex": "W7220451082",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/fsjfbmddz8ygw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "10.26434/chemrxiv.15009928",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009928/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Drawing the Bow: Bending Peropyrene for Singlet Fission",
  "title_text": "Drawing the Bow: Bending Peropyrene for Singlet Fission",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/fsjfbmddz8ygw",
  "venue": "ChemRxiv",
  "versions": []
}