{
  "abstract": "Shape-persistent pyrene-embedded macrocycles remain scarce, and tubular conjugated molecules with intrinsic donor-acceptor (D-A) character have only recently emerged, largely within [n]-cyclo-para-phenylene-based systems. Here we introduce a structurally distinct pyrene-containing nanotube (Pyr4 ), synthesized through a templated approach using an n-pentyl resorcin[4]-arene, in which pyrene units and quinoxaline walls form an integrated D-A framework. Upon light excitation, Pyr4 displays behavior consistent with internal charge-transfer (ICT) between the pyrene donor (D) and the quinoxaline acceptor (A). The analogue with tolyl groups replacing pyrene (Tol4 ) shows markedly weaker D-A behavior. This assignment is supported by electrochemical studies, frontier molecular orbital analysis, and fluorescence solvatochromism, where emission shifts bathochromically by roughly 100 nm from 468 nm in hexane to 564 nm in DMSO. The fluorescence quantum yield (ϕf) falls with increasing solvent polarity, consistent with a stabilized charge-transfer state. In DCM, Pyr4 emits at 528 nm (ϕf = 0.2), red-shifted relative to previously reported pyrene-containing conjugated macrocycles.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States.",
    "Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States.",
    "School of Engineering and Sciences, Tecnologico de Monterrey, Monterrey 64849, Mexico.",
    "Rice Advanced Materials Institute, Rice Sustainability Institute, Rice WaTER Institute, Rice University, Houston, Texas 77005, United States."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Saber Mirzaei",
      "orcid": "0000-0001-9651-9197"
    },
    {
      "affs": [
        0
      ],
      "name": "M Saeed Mirzaei"
    },
    {
      "affs": [
        0
      ],
      "name": "Victor M Espinoza Castro"
    },
    {
      "affs": [
        0,
        2
      ],
      "name": "Marcelo Videa",
      "orcid": "0000-0003-2146-2127"
    },
    {
      "affs": [
        0
      ],
      "name": "Hormoz Khosravi",
      "orcid": "0000-0002-6588-448X"
    },
    {
      "affs": [
        0,
        1,
        3
      ],
      "name": "Raúl Hernández Sánchez",
      "orcid": "0000-0001-6013-2708"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/31bemjdtzx824.bib",
  "cited_by": 0,
  "doi": "10.1021/prechem.6c00084",
  "fulltext_url": "https://europepmc.org/articles/PMC13715350",
  "id": "31bemjdtzx824",
  "issns": [
    "2771-9316"
  ],
  "landing_url": "https://europepmc.org/article/MED/42953273",
  "language": "eng",
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Letter"
    ],
    [
      "lcc",
      "QD1-999"
    ],
    [
      "openalex",
      "1605|Supramolecular Chemistry and Complexes"
    ]
  ],
  "openalex": "W7213918693",
  "pdf_url": "https://europepmc.org/articles/PMC13715350?pdf=render",
  "pmcid": "PMC13715350",
  "pmid": "42953273",
  "published": "2026-09-01",
  "publisher": "American Chemical Society",
  "ris": "https://research.draconitic.com/paper/31bemjdtzx824.ris",
  "sources": [
    {
      "first_seen": "2026-10-31T00:20:41Z",
      "native_id": "MED:42953273",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42953273"
    },
    {
      "first_seen": "2026-10-31T14:21:14Z",
      "native_id": "13445f4ec3384a028fdb01f7c5d23861",
      "source": "doaj",
      "url": "https://doi.org/10.1021/prechem.6c00084"
    },
    {
      "first_seen": "2026-11-01T12:22:41Z",
      "native_id": "PMC13715350",
      "source": "pmc",
      "url": "https://doi.org/10.1021/prechem.6c00084"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1605|Supramolecular Chemistry and Complexes",
      "subfield": "organic"
    }
  ],
  "title": "A Pyrene-Embedded Molecular Nanotube with Donor-Acceptor Properties.",
  "title_text": "A Pyrene-Embedded Molecular Nanotube with Donor-Acceptor Properties.",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T12:22:41Z",
  "url": "https://research.draconitic.com/paper/31bemjdtzx824",
  "venue": "Precision chemistry",
  "versions": []
}