{
  "abstract": "Neutral, globally aromatic boron-containing macrocycles are exceptionally rare, with the 10-bora-21,22,23,24-tetraoxacorroles reported herein representing only the second class of such compounds known to date, following the 5-bora-21,22-dioxaporphyrin we recently described, and are also the first neutral, globally aromatic boracorroles. Here, we present a furan-based 10-bora-21,22,23,24-tetraoxacorrole and an oxadiborepin-fused derivative thereof. The global aromaticity of both macrocyclic boranes in the neutral state is supported by experimental data and NICS and ACID cal­culations. They exhibit intense absorption spanning the ultraviolet to near-infrared (NIR) regions of the electromagnetic spectrum. Notably, the novel boracorroles display bright red and red-to-NIR fluorescence, achiev­ing quantum yields more than twice (Φ fl = 35–46%) that of conventional triphenylcorrole (Φ fl = 19%). DFT analysis reveals that the frontier orbital en­ergies are strongly modulated by the meso- B atom, generating a large HOMO to HOMO−1 energy gap and, consequently, mark­edly enhanced Q-band extinction coefficients arising from the predominantly single-configurational character of the S 0 →S 1 transition (HOMO to LUMO). Incorporation of the BOB bridge in the oxadiborepin-fused derivative significantly stabilizes the LUMO, giving rise to red-shifted absorption and emission alongside distinct electrochemical behavior. In addition, the BOB unit further amplifies the global aromaticity of the boracorrole, underscoring efficient π-conjugation across this heteroatomic bridge.",
  "abstract_shown": true,
  "affiliations": [
    "Institute of Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, Würzburg, Germany, 97074",
    "Institute for Sustainable Chemistry & Catalysis with Boron (ICB)",
    "Julius-Maximilians-Universität Würzburg"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Jonas Fehler"
    },
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Lukas Swoboda",
      "orcid": "0009-0001-2381-9372"
    },
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Alexandra Friedrich",
      "orcid": "0000-0002-1411-7336"
    },
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Vivien Schütz"
    },
    {
      "affs": [
        0,
        1,
        2
      ],
      "name": "Holger Helten",
      "orcid": "0000-0003-1273-3685"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9rh1zdj38mqtf.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15004419/v2",
  "fulltext_url": null,
  "id": "9rh1zdj38mqtf",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15004419/v2",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|Porphyrin and Phthalocyanine Chemistry"
    ]
  ],
  "openalex": "W7213467781",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15004419/v2",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/9rh1zdj38mqtf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:19Z",
      "native_id": "10.26434/chemrxiv.15004419",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15004419/v2"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Porphyrin and Phthalocyanine Chemistry",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Globally Aromatic 10-Boratetraoxacorroles: Boron-Doped Macrocyclic Chromophores with Intense Red-to-Near-Infrared Emission",
  "title_text": "Globally Aromatic 10-Boratetraoxacorroles: Boron-Doped Macrocyclic Chromophores with Intense Red-to-Near-Infrared Emission",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:19Z",
  "url": "https://research.draconitic.com/paper/9rh1zdj38mqtf",
  "venue": "ChemRxiv",
  "versions": []
}