Bis(cyclopentadienyl)chromium and Bis(cyclopentadienylvanadium) Composites of Mesoporous Niobium Oxide with Pseudo-One-Dimensional Organometallic Wires in the Pores
Bibliographic record
Abstract
New composites of mesoporous niobium oxide with mixed oxidation state bis(cyclopentadienyl)vanadium and -chromium phases in the pores were synthesized and characterized by X-ray powder diffraction, nitrogen adsorption, UV, electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), and superconducting quantum interference device magnetometry. The XPS and EPR revealed that the walls of the mesostructure in both composites were reduced and that the organometallic had retained its structural integrity as a combination of neutral and cationic metallocene species. The conductivity of these materials ranged from 10 - 4 to 10 - 6 Ω - 1 cm - 1 and was attributed to the mixed oxidation state organometallic phase since previous studies showed that the reduced niobium oxide mesostructure is inherently insulating. The Hubbard model involving the bandwidth and the Hubbard potential was invoked using electron affinities, ionization potentials, and bandwidths of the organometallic species to verify the model involving electron mobility through the mixed oxidation state organometallic phase. Comparisons to previously studied insulating cobaltocene composites of mesoporous niobium oxide were made in an effort to determine the main factors governing conductivity in these systems.
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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) | 0.001 | 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 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".