{
  "abstract": "Photoinduced electron transfer (PET) along a π-scaffold with breaks remains poorly understood. To address this, we showed that a step-π-conjugated polymer (SPP)─made of alternating pyrrole rings and a single sp3 carbon─enables fast PET through its backbone. In this system, fluorescence quenching occurred when a perylene (Pe) donor was photoexcited in the presence of an anthraquinone (AQ) acceptor. To clarify the quenching mechanism, we considered four possibilities: (i) long-range (pseudo) through-bond PET, (ii) intermolecular through-space PET, (iii) short-range PET (through-space and through-bond), and (iv) intramolecular through-space PET. To systematically test which process dominated, we synthesized three polymers: water-soluble SPP, amphiphilic SPP, and poly(methacrylic acid) sodium salt (PMANa), which lacks π-conjugation. The fluorescence data of these polymers indicate that long-range (pseudo) through-bond PET is the main mechanism in the SPP system. Moreover, femtosecond transient absorption spectroscopy reveals a Pe radical cation (Pe•+) and AQ radical anion (AQ•–), confirming charge separation through the step-π-conjugated backbone. The PET (kET) and charge recombination (kCR) rate constants for RDA ≈ 1.8 nm are estimated to be kET > 2 × 1012 s–1 and kCR ≈ 1011 s–1 order, respectively. Thus, SPP enables long-range, fast PFT via a new π-way mechanism.",
  "abstract_shown": true,
  "affiliations": [
    "Kansai University , Suita , ,"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Daisuke Kitayama"
    },
    {
      "affs": [
        0
      ],
      "name": "Kazuki Takeuchi"
    },
    {
      "affs": [
        0
      ],
      "name": "Akari Terada"
    },
    {
      "affs": [
        0
      ],
      "name": "Shota Shimaoka"
    },
    {
      "affs": [
        0
      ],
      "name": "Hao-xuan Guo"
    },
    {
      "affs": [
        0
      ],
      "name": "Hiroyuki Aota",
      "orcid": "0000-0001-7786-4104"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dmdj5wg5z5e15.bib",
  "cited_by": 0,
  "doi": "10.1021/acsomega.6c06841",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13717650/?tool=EBI",
  "id": "dmdj5wg5z5e15",
  "issns": [
    "2470-1343"
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  "landing_url": "https://pubs.acs.org/acsodf/article/11/42/65145/5451782/Intramolecular-Long-Range-Photoinduced-Electron",
  "language": "eng",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Article"
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      "openalex",
      "1606|Photochemistry and Electron Transfer Studies"
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  "openalex": "W7222267740",
  "pdf_url": "https://pubs.acs.org/doi/pdf/10.1021/acsomega.6c06841",
  "pmcid": "PMC13717650",
  "pmid": "42959852",
  "published": "2026-10-15",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/dmdj5wg5z5e15.ris",
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    {
      "first_seen": "2026-10-30T12:18:39Z",
      "native_id": "10.1021/acsomega.6c06841",
      "source": "crossref",
      "url": "https://pubs.acs.org/acsodf/article/11/42/65145/5451782/Intramolecular-Long-Range-Photoinduced-Electron"
    },
    {
      "first_seen": "2026-10-31T00:20:37Z",
      "native_id": "PMC:PMC13717650",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13717650"
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    {
      "first_seen": "2026-11-01T00:20:52Z",
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      "url": "https://europepmc.org/article/MED/42959852"
    },
    {
      "first_seen": "2026-11-02T12:21:56Z",
      "native_id": "PMC13717650",
      "source": "pmc",
      "url": "https://doi.org/10.1021/acsomega.6c06841"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1606|Photochemistry and Electron Transfer Studies",
      "subfield": "physical"
    }
  ],
  "title": "Intramolecular Long-Range Photoinduced Electron Transfer Using π-Way of a Step-π-Conjugated Polymer",
  "title_text": "Intramolecular Long-Range Photoinduced Electron Transfer Using π-Way of a Step-π-Conjugated Polymer",
  "type": "peer-reviewed",
  "updated_at": "2026-11-02T12:21:56Z",
  "url": "https://research.draconitic.com/paper/dmdj5wg5z5e15",
  "venue": "ACS Omega",
  "versions": []
}