{
  "abstract": "The rich porosity of covalent organic frameworks (COFs) renders them abundant mass transport channels and easily accessible active sites. However, relatively low compact skeletons of COFs are unfavorable for in-plane and out-of-plane electron spin coupling. Herein, we report a new π-extended polyheterocyclic aromatic derivative by fusing three 2,3-dimethylpyrazine moieties to a triphenylene core, which serves as a D3h-symmetric hexatopic monomer to undergo Knoevenagel condensation smoothly with linear dialdehyde aromatics, forming a novel type of two-dimensional vinylene-linked COFs. Their three pairs of vinylene linkages at the adjacent positions of each disc-like vertex with seven fused aromatic rings tend to geometrically constrain the orientation and alleviate the congestion in the chain growth process, leading to in-plane compact Kagome motifs, alternatively patterned with the pseudohexagonal micropore and triangular ultramicropore. The as-prepared COFs enable efficient uptake of iodine molecules and generate a strong charge transfer complex at the pyridine nitrogen atoms, as revealed by electron paramagnetic resonance (EPR) signals. The resultant radicals, densely confined in the highly ordered reticular skeletons, allow for unidirectional electron spin alignment, which further induces a typical ferromagnetic phase transition, delivering metal-free magnetism with a tunable intensity through the compacting of the backbones of COFs.",
  "abstract_shown": true,
  "affiliations": [
    "School of Chemistry and Chemical Engineering, State Key Laboratory of Synergistic Chem-Bio Synthesis",
    "Shanghai Jiao Tong University",
    "Frontiers Science Center for Transformative Molecules",
    "Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University",
    "Yunnan Advanced Elastomer Industry Innovation Research Institute Co., Ltd"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Fancheng Meng",
      "orcid": "0000-0003-4424-9556"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Jinyu Zhao"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Jindong Wu"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Xuanzi Ye"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Xiaomeng Li"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Kaiyue Jiang"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Bai Xue"
    },
    {
      "affs": [
        0,
        1,
        2,
        3
      ],
      "name": "Xiaodong Zhuang"
    },
    {
      "affs": [
        4
      ],
      "name": "Jianneng Li"
    },
    {
      "affs": [
        4
      ],
      "name": "Kui Yang"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Fan Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6hq8x88nsbv92.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15010818/v1",
  "fulltext_url": null,
  "id": "6hq8x88nsbv92",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010818/v1",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|Covalent Organic Framework Applications"
    ]
  ],
  "openalex": "W7223178549",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15010818/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/6hq8x88nsbv92.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:24Z",
      "native_id": "10.26434/chemrxiv.15010818",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010818/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Covalent Organic Framework Applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Vinylene-Linked Covalent Organic Frameworks with Heteropore-Tuned Compact Motifs for Boosting Spin-Spin Interactions",
  "title_text": "Vinylene-Linked Covalent Organic Frameworks with Heteropore-Tuned Compact Motifs for Boosting Spin-Spin Interactions",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:24Z",
  "url": "https://research.draconitic.com/paper/6hq8x88nsbv92",
  "venue": "ChemRxiv",
  "versions": []
}