{
  "abstract": "Ammonia (NH 3 ) is an indispensable chemical commodity in modern society, but its nature as a toxic and corrosive gas makes its storage and transport difficult. Here, we report non-porous molecular nickel thiobenzoate [Ni 2 (PhCOS) 4 ] and derivatives, as a distinct class of phase-transformable adsorbents for reversible and high-density ammonia storage in ambient conditions. Despite lacking intrinsic porosity, [Ni 2 (PhCOS) 4 ] presented excellent sorption capacity of 23.5 mmol/g (effective reversible capacity: 22.0 mmol/g) at 298 K and 1 bar. The multi-sigmoidal adsorption profile, arising from solid-state chemical transformation into well-defined compounds of formulas {Ni 2 (PhCOS) 4 (NH 3 ) n } (n = 1, 8 and 16), provides a large pressure-swing working capacity (11.4 mmol/g between 0.1 and 1.0 bar) and enables complete, energy-efficient regeneration under remarkably mild conditions (60–80 °C). The transformation was associated with drastic changes in the coordination environment of Ni centers yet was fast and fully reversible. Phase transformation-induced self-fragmentation generates hierarchical diffusion pathways, driving rapid kinetics (50% uptake in 95 s). Furthermore, the complex demonstrates outstanding ambient moisture tolerance, 10-cycle durability, scalable one-pot synthesis exceeding 60 g (81% yield), and practical cartridge-level storage (+36wt% mass increase), demonstrating dynamic molecular complexes as a practical platform for gas management.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemistry",
    "Kyushu University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Benjamin Le Ouay",
      "orcid": "0000-0001-7053-4786"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Yume Matsumoto"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Ao Zhang"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Manami Ueno"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Ryo Ohtani"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Masaaki Ohba"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7c6wgym1jbxr6.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009231/v1",
  "fulltext_url": null,
  "id": "7c6wgym1jbxr6",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009231/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",
      "1604|Metal-Organic Frameworks: Synthesis and Applications"
    ]
  ],
  "openalex": "W7213986411",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15009231/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/7c6wgym1jbxr6.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:21Z",
      "native_id": "10.26434/chemrxiv.15009231",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009231/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1604|Metal-Organic Frameworks: Synthesis and Applications",
      "subfield": "inorganic"
    }
  ],
  "title": "Fully Reversible High-Capacity Ammonia Storage in a Series of Phase-Transformable Molecular Nickel Thiocarboxylates",
  "title_text": "Fully Reversible High-Capacity Ammonia Storage in a Series of Phase-Transformable Molecular Nickel Thiocarboxylates",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:21Z",
  "url": "https://research.draconitic.com/paper/7c6wgym1jbxr6",
  "venue": "ChemRxiv",
  "versions": []
}