Etude de systèmes supramoléculaires pour l'optimisation de la conversion ascendante de photons
Bibliographic record
Abstract
The realization of this thesis was possible thanks to the funding of the ministère de l’enseignement supérieur, de la recherche et de l’innovation, through the France-Canada Research Fund. The aim of this thesis is to study supramolecular systems in order to increase the efficiency of photon upconversion (UC).The first system studied is constituted of Tb(III) ions in the presence of Yb(III) complexes according to the cooperative sensitization mechanism and allowed to understand the UC process. An interest was then focused on nonanuclear clusters of Yb(III) and Tb(III) ions which confer an increased proximity between the ions. The optimization of these systems has led to the best UC quantum yield (2.8×10-6 @ 2.86 W.cm-2) at the molecular scale at present. By using homonuclear clusters of Yb(III), the observation for the first time of the cooperative luminescence mechanism with supramolecular systems was possible. A more detailed study, allowing to confirm the realization of this mechanism with at least two Yb(III) ions was then carried out, by the use of Yb(III) dimers. Finally, an assembly between Yb(III) complexes and a Ru(II) complex was synthesized, resulting in the observation of the UC for the first time with energy transfer from an f element to a d one.
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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 | 0.006 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.003 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.012 | 0.001 |
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; both teacher heads agree on what is shown here.
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".