Organoplatinum Polymorphs with Varying Molecular Conformation, Intermolecular Interaction, and Luminescence
Bibliographic record
Abstract
Two mononuclear organoplatinum complexes based on the 2,2‘-dipyridylamino derivative ligands (2,2‘-dipyridylamino)phenyl triphenyl methane (dm) and (2,2‘-dipyridylamino)phenyl triphenyl silane (dsi) with the formula PtPh 2 (dm) ( 1 ) and PtPh 2 (dsi) ( 2 ), respectively, have been synthesized. Both 1 and 2 have been found to form two polymorphs concomitantly: a colorless blue-luminescent form A (space group I 4 1 / a ) ( 1A and 2A ) and a yellow nonluminescent form B (space group P 2 1 / c ) ( 1B and 2B ). The crystal structures of 1A, 1B, and 2A were determined by single-crystal X-ray diffraction analyses. The CPh 3 group was found to display different conformations in the crystal lattices of 1A and 1B . Considerable variations in intermolecular interactions were also observed for the crystals of 1A and 1B . 2A was found to be isostructural to 1A . Spectroscopic study (UV−vis and luminescence) and molecular orbital calculations (Gaussian98) were performed to understand the color and luminescent differences between 1A and 1B . Intermolecular π−π stacking interactions between a phenyl of the CPh 3 group and the pyridyl of the 2,2‘-dipyridylamino group were found to be the most likely cause for the absence of emission in the crystals of 1B .
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 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".