{
  "abstract": "Multiple resonance emitters are highly sought after for their intrinsically narrowband emission, yet achieving long-wavelength emission without spectral broadening remains a critical challenge. Herein, we report a naphthalene fused rigid π-extension strategy based on the meta-positioned dual boron framework BBCz-DB by replacing its peripheral carbazole units with naphthalene fragments to develop the yellow MR emitter DB-CzNa. This molecular design leverages the dual aromaticity of naphthalene: while the global π-delocalization effectively narrows the energy gap, the preserved local aromaticity maintains a highly rigid molecular framework, which significantly suppresses excited-state vibronic coupling. This synergistic effect allows the MR emitters to achieve a pronounced emission redshift without sacrificing their narrow emission characteristics. Consequently, DB-CzNa achieves an 80 nm redshift relative to BBCz-DB, delivering yellow emission at 546 nm with an ultra-narrow full width at half maximum of 16 nm (0.07 eV) in toluene. A sensitized fluorescence organic light emitting diode device based on DB-CzNa affords a yellow electroluminescence at 556 nm with a FWHM of 24 nm and a maximum external quantum efficiency of 26.9%. This work demonstrates that judicious naphthalene fusion on meta-dual boron frameworks provides a powerful strategy to overcome the trade-off between spectral redshift and broadening.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "name": "Chuanqin Cheng",
      "orcid": "0009-0008-2340-053X"
    },
    {
      "name": "Zhongbo Xiang"
    },
    {
      "name": "Wenting Sun"
    },
    {
      "name": "Meiyan Liu"
    },
    {
      "name": "Haowen Chen"
    },
    {
      "name": "Haowen Li"
    },
    {
      "name": "Minqiang Mai"
    },
    {
      "name": "Dongdong Zhang"
    },
    {
      "name": "Lian Duan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5801n45ee5744.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15008223/v1",
  "fulltext_url": null,
  "id": "5801n45ee5744",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008223/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 Light-Emitting Diodes Research"
    ]
  ],
  "openalex": "W7207592512",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15008223/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/5801n45ee5744.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:17Z",
      "native_id": "10.26434/chemrxiv.15008223",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008223/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "Naphthalene-Fused Meta-Dual-Boron Compounds Enable an 80 nm Redshift with Concurrently Narrowed Full Widths at Half Maximum",
  "title_text": "Naphthalene-Fused Meta-Dual-Boron Compounds Enable an 80 nm Redshift with Concurrently Narrowed Full Widths at Half Maximum",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:17Z",
  "url": "https://research.draconitic.com/paper/5801n45ee5744",
  "venue": "ChemRxiv",
  "versions": []
}