{
  "abstract": "We report a new class of heterovalent, homometallic ring complexes, with {TiIV 7TiIII} cores: [py‐CH2NH2Et][Ti7TiO8(O2CR)16] (R = tBu and cyclopropyl). The compounds are made from [Ti(OiPr)4] reacted with carboxylic acid and py‐CH2NHEt. We also show that {TiIV 7TiIII} rings can be generated by photoreduction of {TiIV 8} precursors in the presence of a suitable sacrificial electron donor, of relevance to photocatalysts. UV–vis/NIR spectroscopy of the {TiIV 7TiIII} rings reveal Robin and Day Class II mixed‐valent behavior at room temperature, while EPR spectroscopy is consistent with a localized 3d1 (s = 1/2) configuration, with C2 local symmetry, at low temperatures. We compare the EPR behavior of these new rings with the isostructural heterometallic {CrIII 7NiII} rings [py‐CH2NH2Et][Cr7NiF8(O2CR)16], which also have s = ½ ground states, due to strong intramolecular antiferromagnetic exchange interactions. We demonstrate that the electron spin lattice relaxation time constants (T 1) for {TiIV 7TiIII} are over two orders of magnitude longer at low temperatures than for the {Cr7Ni} equivalents, and that phase memory time constants (T m) are maintained to much higher temperatures.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemistry and Photon Science Institute The University of Manchester Manchester England"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Selena J. Lockyer"
    },
    {
      "affs": [
        0
      ],
      "name": "Lubomir Loci"
    },
    {
      "affs": [
        0
      ],
      "name": "Yingzhao Ma"
    },
    {
      "affs": [
        0
      ],
      "name": "Matthew P. Stevens"
    },
    {
      "affs": [
        0
      ],
      "name": "Grigore A. Timco"
    },
    {
      "affs": [
        0
      ],
      "name": "George F. S. Whitehead"
    },
    {
      "affs": [
        0
      ],
      "name": "Richard E. P. Winpenny",
      "orcid": "0000-0002-7101-3963"
    },
    {
      "affs": [
        0
      ],
      "name": "Alice M. Bowen"
    },
    {
      "affs": [
        0
      ],
      "name": "Eric J. L. McInnes",
      "orcid": "0000-0002-4090-7040"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dt25m7mcpzfyp.bib",
  "cited_by": 0,
  "doi": "10.1002/chem.71451",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13715050/",
  "id": "dt25m7mcpzfyp",
  "issns": [
    "0947-6539",
    "1521-3765"
  ],
  "landing_url": "https://doi.org/10.1002/chem.71451",
  "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": [
    [
      "heading",
      "Research Article"
    ],
    [
      "openalex",
      "2504|Magnetism in coordination complexes"
    ]
  ],
  "openalex": "W7169660016",
  "pdf_url": null,
  "pmcid": "PMC13715050",
  "pmid": "42470626",
  "published": "2026-07-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dt25m7mcpzfyp.ris",
  "sources": [
    {
      "first_seen": "2026-11-01T12:22:26Z",
      "native_id": "PMC13715050",
      "source": "pmc",
      "url": "https://doi.org/10.1002/chem.71451"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2504|Magnetism in coordination complexes",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Heterovalent, Homometallic Rings: Synthesis, Optical, and EPR Studies of {TiIV 7TiIII} Complexes",
  "title_text": "Heterovalent, Homometallic Rings: Synthesis, Optical, and EPR Studies of {TiIV 7TiIII} Complexes",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T12:22:26Z",
  "url": "https://research.draconitic.com/paper/dt25m7mcpzfyp",
  "venue": "Chemistry (Weinheim an Der Bergstrasse, Germany)",
  "versions": []
}