SYNTHESIS AND CHARACTERIZATION OF AB_2 AN TYPE FUNCTIONAL β-CYCLODEXTRIN MONOMER AND ITS WATER-SOLUBLE HYPERBRANCHED POLYMER
Bibliographic record
Abstract
To obtain well-defined structures of a β-cyclodextrin based monomer and its hyperbranched polymer,an AB_2 type monomer carrying Si—H and —CHCH_2 groups was first synthesized via modification of C-2 and C-6 hydroxyl groups in β-cyclodextrin,respectively.And then,the water-soluble hyperbranched polymer was prepared via hydrosilylation using N,N-dimethylformamide as the solvent and H_2PtCl_6 as the catalyst at 100℃.The molecular structures for both monomer and polymer were characterized by 1H-NMR,13C-NMR,MALDI-TOF MS and elemental analysis.It was found that the actual molecular structures for both monomer and polymer were identical with the designed structures,and there also existed α hydrosilylation and β hydrosilylation during polymerization,as a result,the hyperbranched polymer possesses a large amount of functional vinyl bonds around its end chains.The polymer synthesized is soluble in tetrahydrofuran slightly and insoluble in nonpolar solvents such as hexane.The molecular weight,molecular weight distribution and intrinsic viscosity of the polymer were measured as 36690,1.887 and 15.8 mL/g,respectively by using size exclusion chromatography/multi-angle laser light scattering(SEC/MALLS) instrument.Due to two different cavities which are from β-cyclodextrin and the hyperbranched polymer,a possible novel spuramolecular system which may capsulize two more different molecules in a single polymer can be constructed.
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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".