Interaction of 2-(2′-pyridyl)benzimidazolyl derivative ligands with group 12 metal ions: coordination, structures and luminescence
Bibliographic record
Abstract
The coordination chemistry of the group 12 metal ions with two 2-(2'-pyridyl)benzimidazolyl derivative ligands 1,3,5-tris[2-(2'-pyridyl)benzimidazolyl]benzene (tmb) and 2-(2'-pyridyl)benzimidazolylbenzene (mb) has been investigated. The crystal structures of two coordination compounds (HgCl(2))(2)(tmb) and [Zn(mb)(2)(H(2)O)][ClO(4)](2) have been determined by single-crystal X-ray diffraction analysis which established the chelate bonding mode by the group 12 metal ions to the tmb or mb ligand. The luminescent response of tmb and mb toward group 12 metal ions, Zn(II), Cd(II) and Hg(II) has been examined by fluorescent titration experiments which established that the three group 12 metal ions have distinct luminescent response toward the tmb or mb ligand. The addition of the Hg(II) ion resulted in fluorescence quenching. In contrast, the addition of Zn(II) or Cd(II) led to a red shift and dramatic intensity increase of the emission spectrum of the ligand.
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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 | 0.000 |
| 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 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".