Europium(III) bis(terpyridine-trioxide) tetracyanoaurate(III) complexes supporting high nuclearity water clusters and exhibiting hydration-dependent quantum yields
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Bibliographic record
Abstract
Assembly of europium(III) bis(terpyridine-trioxide) complexes supports high nuclearity water clusters and subsequent step-wise dehydration produces compounds showing hydrationdependent quantum yields. Using the ligand 2,2′;6′,2″-terpyridine- N , N ’ ,N”- trioxide (terpyO 3 ), the series of hydrates [Eu(terpyO 3 ) 2 ] 2 (OH 2 ) y (OH)[Au(CN) 4 ] 5 ·xH 2 O (y = 3, x = 10, 1 · 13H 2 O ; y = 3, x = 6, 1 · 9H 2 O ; y = 2, x = 4, 1 · 6H 2 O ; and y = 2, x = 1, 1 · 3H 2 O ) was synthesized, with 1 · 13H 2 O crystallizing out of water, 1 · 9H 2 O forming after removal from the mother liquor, 1 · 6H 2 O forming at 60 °C, and 1 · 3H 2 O generated at 160 °C. The first three compounds were structurally characterized and feature large water clusters supported between the Eu-terpyO 3 metal–ligand complexes, and 2-D or 1-D motifs of [Au(CN) 4 ] − anions assembled via Au· N -cyano interactions. 1 · 3H 2 O was amorphous. Crystallographic evidence showed that the [Au(CN) 4 ] − N -cyano groups replace Eu(III)-bound aqua ligands as dehydration proceeds. The photoluminescence properties of 1 · 9H 2 O and 1 · 3H 2 O show ligand-sensitized Eu(III)-based emission and quantum yields of 20.5(11) and 49(2)% and lifetimes of 277.5(6) and 445(17) μs, respectively, with these differences likely due to the decrease in number of OH oscillators nearby the Eu(III) centres in the lower hydrate form.
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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 | 0.001 | 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 | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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