Thermally Activated Dual‐Room‐Temperature Phosphorescence: Triplet Up‐Converted Anti‐Kasha in Dendrimers Enabled by Rigid Matrix Stabilization
Why this work is in the frame
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Bibliographic record
Abstract
ABSTRACT Room‐temperature phosphorescence (RTP) materials are a significant research field for anti‐counterfeiting, bioimaging, and optoelectronic devices, but anti‐Kasha RTP still lacks clear molecular design strategies, and conventional rigid polymer matrices fail to break Kasha's rule. To address these issues, this work proposes an acceptor dendronization strategy to synthesize the dendrimer emitter dTC‐BPSAF. Carbazole dendrons regulate triplet hybridization, enabling dTC‐BPSAF to form near‐degenerate lowest triplet ( T 1 ) and high‐lying triplet ( T 2 ) states with hybrid local‐charge transfer (HLCT) character and large spin‐orbit coupling. Integrating dTC‐BPSAF into rigid polymers further stabilizes T 2 by suppressing non‐radiative decay. Temperature‐dependent time‐resolved phosphorescence spectra and transient absorption spectra confirm that rigid matrix‐based films exhibit thermally activated endothermic T 1 → T 2 up‐conversion and dual‐band anti‐Kasha RTP. In contrast, a moderately rigid polymer matrix shows weak T 2 emission, while a soft polymer matrix only produces T 1 emission. This study establishes a dendrimer‐matrix synergy strategy combining molecular‐level triplet engineering, providing a generalizable approach for efficient anti‐Kasha RTP materials and new avenues for advanced photonics.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 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