研究目的
To elevate the profile of Raman spectroscopy in the undergraduate chemistry curriculum by integrating it with students’ experiences in organic and physical chemistry laboratories, highlighting its role in structure elucidation and its complementarity with infrared spectroscopy.
研究成果
The integration of Raman spectroscopy into the undergraduate chemistry curriculum complements the study of IR spectroscopy and prepares students for advanced studies in physical chemistry. The technique offers unique insights into molecular structure and symmetry, enhancing students' understanding of vibrational spectroscopy.
研究不足
The study is limited by the challenge of synthesizing authentic samples of certain isomers for comparison and the need for computational support to assign some Raman signals. Future work includes synthesizing authentic samples and further computational analysis.
1:Experimental Design and Method Selection:
The study integrates Raman spectroscopy into the analysis of compounds synthesized in organic chemistry courses, comparing it with infrared spectroscopy to elucidate molecular structure.
2:Sample Selection and Data Sources:
Reaction products from electrophilic aromatic substitution, Diels-Alder, and aldol condensation reactions, including site-specific deuteration, are analyzed.
3:List of Experimental Equipment and Materials:
Raman spectra were obtained on a B&W Tek I-Raman Plus 532nm excitation system with a 20x objective. Infrared spectra were obtained on a Perkin-Elmer Frontier FT-IR fitted with an ATR accessory.
4:Experimental Procedures and Operational Workflow:
Laser power was varied between 20 – 50 mW and 10-20 second integrations for Raman spectra. IR spectra consisted of 16 scans and were background subtracted.
5:Data Analysis Methods:
Spectra were analyzed to compare Raman and IR signals, focusing on changes in dipole moment and polarizability.
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