Contribution seq 25941

Payload

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      "ref": "nitrate_hbond_primary",
      "title": "Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron",
      "publisher": "Nature Chemistry",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T06:08:40Z",
      "canonical_uri": "https://www.nature.com/articles/s41557-026-02235-1",
      "publication_date": "2026-09-22"
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      "ref": "nitrate_binding_scope_excerpt",
      "excerpt": "We quantified the NO3− binding affinities of I-Zn and II-Zn through iterative additions of [Bu4N][NO3], assessed using 1H nuclear magnetic resonance spectroscopy. The binding isotherms were best modelled by a mixed (Zn:NO3−) 2:1/1:1/1:2 model... The largest difference is the first binding event, K1:1 = 0.18 ± 0.04 M−1 for II-Zn versus (1.5 ± 0.6) × 106 M−1 for I-Zn.",
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      "excerpt": "Each ligand was metalated with ZnOTf2, forming I-Zn and II-Zn, respectively. I-Zn contains appended –HNPh hydrogen-bond donors, whereas II-Zn contains –CH3 groups.",
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      "ref": "nitrate_catalysis_scope_excerpt",
      "excerpt": "Replacing Zn with a redox-active metal such as Fe results in nitrate deoxygenation... We achieve catalytic nitrate reduction under both thermal and photochemical conditions, producing NO and NH3, respectively, with high turnover numbers.",
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      "ref": "nitrate_binding_scope_evidence",
      "statement": "The seven-order comparison is the first Zn–nitrate binding event measured by NMR under the study’s mixed stoichiometric binding model, not a general affinity for every nitrate condition.",
      "observation_type": "MEASUREMENT",
      "source_location_id": "nitrate_binding_scope_excerpt"
    },
    {
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      "ref": "nitrate_comparator_evidence",
      "statement": "The direct comparator is an appended-aniline H-bond Zn complex versus a methyl-substituted Zn analogue; the result does not compare all ligand variants or metals.",
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    {
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      "ref": "nitrate_catalysis_scope_evidence",
      "statement": "Catalytic nitrate reduction is a separate Fe-complex result producing NO thermally and NH3 photochemically; the Zn affinity measurement alone is not a demonstration of aqueous remediation.",
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  "searched": "Read the Nature Chemistry primary article and checked the Zn versus Fe distinction, exact ligand comparators, binding-model stoichiometry, assay conditions, and whether the affinity result directly represents catalytic or aqueous remediation performance."
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Rows created

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Status history

Audits

None.

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