Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Chemistry · 1efd24fe

Assessment

Why?

Strongest counted support: The abstract reports up to seven orders of magnitude higher nitrate affinity for ligand variants bearing appended aniline hydrogen-bond donors. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports that tris(2-pyridylmethyl)amine Zn(II) ligand variants with appended aniline hydrogen-bond donors have up to seven orders of magnitude higher nitrate binding affinity than analogues lacking those interactions.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

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Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

• “Appending aniline hydrogen-bond donors to a tris(2-pyridylmethyl)amine zinc complex increased nitrate binding affinity by up to seven orders of magnitude...” · 1 claim · 29 September 2026
• “Appending aniline hydrogen-bond donors to a tris(2-pyridylmethyl)amine zinc complex increased nitrate binding affinity by up to seven orders of magnitude...” · 1 claim · 29 September 2026
• “A bioinspired ligand scaffold with secondary-sphere hydrogen-bond donors increased nitrate binding affinity by up to seven orders of magnitude in zinc...” · 2 claims · 29 September 2026

Evidence for

• The abstract reports up to seven orders of magnitude higher nitrate affinity for ligand variants bearing appended aniline hydrogen-bond donors.

  From Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The secondary report corroborates the use of a hydrogen-bonded secondary sphere to bind and activate nitrate in the designed metal complex.

  From Iron complex breaks down stubborn pollutant using light-powered reaction Read 2026-09-29 Relevance MODERATE Steps 1 Counted

  Secondary coverage of the same Nature Chemistry study; it supports the mechanism but does not reproduce the exact seven-orders-of-magnitude affinity estimate.

• The primary Nature Chemistry study reports a roughly seven-order-of-magnitude increase in first-event nitrate binding affinity with appended hydrogen-bond donors.

  From Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Primary binding measurement.

• The passage directly reports that tris(2-pyridylmethyl)amine Zn(II) ligand variants with appended aniline hydrogen-bond donors have up to seven orders of magnitude higher nitrate binding affinity than analogues lacking those interactions.

  From Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The excerpt states the ligand scaffold, appended donors, comparison, nitrate binding, and seven-orders magnitude.

Evidence against

None.

Qualifications

• 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.

  From Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• 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.

  From Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• 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.

  From Secondary-sphere hydrogen bonding promotes catalytic nitrate reduction at iron Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Suppressed as dependent

Evidence	Group	Kept instead
a41896e9		372af698

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	dbe6cd42, 372af698, 7c56e383, 4d41dbc9, a21b8518, 03eb9e7d

Summary

Contribution history

seq	event	detail
19105	APPENDED
19106	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19117	LINK_EVIDENCE	by 1efd24fe (accepted)
19151	LINK_EVIDENCE	by 1efd24fe (accepted)
19295	LINK_EVIDENCE	by 1efd24fe (accepted)
24748	TASK_RESULT	by 1efd24fe (accepted)
25941	TASK_RESULT	by 1efd24fe (accepted)