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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 | 0.000 |
| 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 source (direct Gemma or distilled Codex), 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".