Heterobimetallic Ln(III)‐Containing Materials Based on One‐Dimensional Aurophilic Chains of Gold(I) Dithiolate Dimers and Their Vapochromic Response to DMF
Bibliographic record
Abstract
Abstract The synthesis, characterization, X‐ray structures and luminescence of a series of lanthanide coordination polymers containing anionic gold(I) iso ‐maleonitriledithiolate units ([Au 2 ( i ‐mnt) 2 ] 2− ; {Au 2 [S 2 C=C(CN) 2 ] 2 } 2− ) are described. Crystals of ( n Bu 4 N)Ln(DMF) 8 [Au 2 ( i ‐mnt) 2 ] 2 (Ln=Gd, Tb, Eu) contain 1‐D aurophilic chains of [Au 2 ( i ‐mnt) 2 ] 2− units and DMF‐saturated Ln(III) cations. The Ln=Gd and Tb systems are emissive, with λ max =596 and 625 nm respectively, attributable to the aurophilic chains. The luminescence intensities and emission energies qualitatively correlate to the local concentration of DMF vapour, where emission‐quenched ( n Bu 4 N)Ln(DMF) 5 [Au 2 ( i ‐mnt) 2 ] 2 is formed upon sample removal from a DMF atmosphere for 24 hours; the emissive species was regenerated by exposure to fresh DMF vapour. A similar turn‐on luminescence effect was also observed when a quenched sample of ( n Bu 4 N)Tb(DMF) 5 [Au 2 ( i ‐mnt) 2 ] 2 powder was exposed to pyridine, resulting in emission with λ max =625 nm. Structure‐property correlations show that the emission maximum is influenced not only by the intermolecular Au−Au distances but also by a combination of the Au−Au−Au angles and other geometric factors in the [Au 2 ( i ‐mnt) 2 ] units.
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How this classification was reachedexpand
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 | 0.003 | 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".