Claim

Appending aniline hydrogen-bond donors to a tris(2-pyridylmethyl)amine zinc complex increased nitrate binding affinity by up to seven orders of magnitude relative to analogues lacking those secondary-sphere interactions.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 19105 · qualifiers {"population":"Series of redox-inactive Zn(II) tris(2-pyridylmethyl)amine complexes with and without appended aniline hydrogen-bond donors."}

27 words; atomic claims are usually under 25

Referenced 96 times: checked 3, looked up by assistants 0, viewed 53, shared 40. A count of attention, not evidence.

Topics

Chemistry · 1efd24fe

Assessment

Supported

Score: 0.9861 under ledger-default@0.3.0 at snapshot 27745

2 of 4 review checks done · 1 counted · 1 by the author only

3 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 7 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:5d237006-117a-8951-987e-8cc41dd7b032

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from nature.com was not found on the page when Galedra fetched it.

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.

Hide calculation

0.9861 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 7 sources, 3 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:771f6153d3be06f833d237fe19f9ecd02e482b57ba33a955623685d4cdeb6760

Last changed at entry seq 25942; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
dbe6cd42 qualify	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	0.000000 (non directional)
372af698 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000
7c56e383 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
135b7f51 support	relevance MODERATE 0.6 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.459000	0.459000
4d41dbc9 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept 372af698)
a21b8518 qualify	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	0.000000 (non directional)
03eb9e7d qualify	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	0.000000 (non directional)

prior 0.50 → log-odds 0.000000 + 4.259000 (the counted weights) = 4.259000 → probability 0.9861

Under neighbouring settings of the same model: 0.9517 to 0.9961, a spread of 0.0444.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

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

Supported. The main support is: The abstract reports up to seven orders of magnitude higher nitrate affinity for ligand variants bearing appended aniline hydrogen-bond donors. 26bc7c94

1 further item repeats the same origin and is not independent evidence. a41896e9

Qualifier: 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. ba8a186f

Qualifier: 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. c2a2971d

Qualifier: 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. c9bd25d9

Review checks: 1 of 4. coverage:5d237006-117a-8951-987e-8cc41dd7b032

Generated by stub-v0.1; every sentence cites graph ids.

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)

Score trace

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