{
  "abstract": "Linked photosensitizer-catalyst dyads based on earth-abundant metal complexes are currently potential candidates for sustainable proton reduction systems. Fe(III) carbene complexes showing low-lying ligand-to-metal charge transfer (LMCT) states with lifetimes in the 0.2-0.3 ns range are promising candidates for the photosensitizer side. The latter must be linked to a proton reduction catalyst, usually of cationic character, like cobaloxime. We explore the feasibility of this approach with a model compound mimicking the inductive effect of the cobaloxime moiety on the electronic state structure of a Fe(III) photosensitizer. Thus, the homoleptic pyridine-substituted [Fe(ImPPy) 2 ] + (HImPPy = 1,1 0 -(5-(pyridin-4-yl)-1,3-phenylene)bis(3-methyl-1H-imidazol-3-ium)) complex was modified by attaching a methyl group at the pyridinyl nitrogen, to model the inductive effect of a positively charged catalytic centre on the Fe(III) photosensitizer. Reduction of ligand electron density leads to stabilization of metal-toligand ( 2 MLCT) excited states, as predicted by TD-DFT calculations. Experimental support is provided by a combination of cyclic voltammetry and ultrafast spectroscopies. [Fe(ImPPyMe) 2 ] 3+ shows a characteristic lifetime of 80 AE 10 ps for the stabilized 2 MLCT state. This constitutes a promising starting point for later use of [Fe(ImPPy) 2 ] + as a photosensitizer in bimetallic one-component dyads for photoinduced hydrogen production.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 10,
  "authors": [
    {
      "name": "Lennart Schmitz"
    },
    {
      "name": "J. Luis Pérez Lustres"
    },
    {
      "name": "Ronan Viel"
    },
    {
      "name": "Jannik Löseke"
    },
    {
      "name": "Lorena Fritsch"
    },
    {
      "name": "Xiao-Hui Li"
    },
    {
      "name": "Roland Schoch"
    },
    {
      "name": "Stefan Haacke"
    },
    {
      "name": "Karsten Heyne"
    },
    {
      "name": "Matthias Bauer"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9mcxwak91qpgb.bib",
  "cited_by": 0,
  "doi": "10.1039/d6cp00443a",
  "fulltext_url": null,
  "id": "9mcxwak91qpgb",
  "issns": [
    "1463-9076",
    "1463-9084"
  ],
  "landing_url": "https://hal.science/hal-05780390v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "openalex",
      "2105|Metalloenzymes and iron-sulfur proteins"
    ]
  ],
  "openalex": "W7171384772",
  "pdf_url": "https://hal.science/hal-05780390/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-27",
  "publisher": "Royal Society of Chemistry",
  "ris": "https://research.draconitic.com/paper/9mcxwak91qpgb.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:48Z",
      "native_id": "hal-05780390",
      "source": "hal",
      "url": "https://hal.science/hal-05780390v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:0.chim",
      "subfield": "general"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Pyridine-substituted Fe( iii ) complexes – on the way to one-component photo-catalytical systems",
  "title_text": "Pyridine-substituted Fe( iii ) complexes – on the way to one-component photo-catalytical systems",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:48Z",
  "url": "https://research.draconitic.com/paper/9mcxwak91qpgb",
  "venue": "Physical Chemistry Chemical Physics",
  "versions": []
}