{
  "abstract": "Anions are inherently basic, and the use of counteranions of photocatalysts in substrate activation relies heavily on the Brønsted-basic nature of the anions. Here we present ion-paired dual catalysis using Ru(bpy)₃ ²⁺ with a stable, strongly Lewis-acidic, yet non-nucleophilic anion BBcat. BBcat captures Lewis-basic substrates at the tricoordinated catechol borane (Bcat) centers and keeps them in close proximity to Ru(bpy)₃ ²⁺, affording chemoselective and concentration-independent rate enhancement. In [2+2] photocycloaddition of pyridyl enones, Ru(bpy)₃(BBcat)₂ affords 8.7-times higher yield than Ru(bpy)₃(BArF)₂, and product selectivity is reversed in competitive reactions with a simple chalcone. Quenching experiments and NMR studies confirmed that BBcat facilitates substrate capture by acid-base interactions and the proximity of the ion pair by electrostatic interactions.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo Japan nozaki@chembio.t.u-tokyo.ac.jp.",
    "Department of Applied Chemistry, Graduate School of Engineering, Kyushu University 744 Motooka, Nishi-ku Fukuoka Japan iwasaki@cstf.kyushu-u.ac.jp."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Ryo Mandai",
      "orcid": "0009-0000-3389-933X"
    },
    {
      "affs": [
        1
      ],
      "name": "Yuri Oyama"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Takanori Iwasaki",
      "orcid": "0000-0002-6663-3826"
    },
    {
      "affs": [
        0
      ],
      "name": "Kyoko Nozaki"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/41ydqvnp7fxkt.bib",
  "cited_by": 0,
  "doi": "10.1039/d6sc06879k",
  "fulltext_url": "https://europepmc.org/articles/PMC13688101",
  "id": "41ydqvnp7fxkt",
  "issns": [
    "2041-6520",
    "2041-6539"
  ],
  "landing_url": "https://europepmc.org/article/MED/42923726",
  "language": "eng",
  "licence": "CC-BY-NC",
  "licence_label": "CC BY-NC",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1605|Radical Photochemical Reactions"
    ]
  ],
  "openalex": "W7221004751",
  "pdf_url": "https://europepmc.org/articles/PMC13688101?pdf=render",
  "pmcid": "PMC13688101",
  "pmid": "42923726",
  "published": "2026-10-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/41ydqvnp7fxkt.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:33Z",
      "native_id": "MED:42923726",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42923726"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1605|Radical Photochemical Reactions",
      "subfield": "organic"
    }
  ],
  "title": "A Lewis-acidic anion enhances energy transfer from excited cationic photocatalysts to basic substrates.",
  "title_text": "A Lewis-acidic anion enhances energy transfer from excited cationic photocatalysts to basic substrates.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:20:33Z",
  "url": "https://research.draconitic.com/paper/41ydqvnp7fxkt",
  "venue": "Chemical science",
  "versions": []
}