Intercalation and Complexation of Co(II) and Ni(II) by Chelating Ligands Incorporated in Zn-Al Layered Double Hydroxides
Why this work is in the frame
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Bibliographic record
Abstract
Zn,Al layered double hydroxides (LDHs) intercalated by a series of organic chelating ligands (L), including anionic ethylenediamine-N,N-diacetate (EDDA), nitrilotriacetate (NTA), ethylenediaminetetraaetate (EDTA), and diethylenetriaminepentaacetate (DTPA) as guests, were prepared by co-precipitation and anion exchange of precursor Zn,Al-NO3 LDHs. The chelation of transition metal ions (Co 2+ and Ni 2+ ) from aqueous solution and the intercalation of pre-formed complexes of the type (M(edda)) 2- , (M(nta)) - , (M(edta)) 2- and (M(dtpa)) 3- , have been investigated. Powder X-ray diffraction (PXRD) showed that the basal spacing increased from 9.0 A for the precursor materials to 12.0-15.3 A for the pillared hybrids. Elemental analysis and FT-IR spectroscopy indicated that most of the interlayer nitrate anions were displaced by L anions to form LDHs-L, which then reacted with the metal ions to form (M(L)) n- complexes between the LDHs layers. The compounds were studied by thermal gravimetric (TG) and differential thermal analysis (DTA).
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it