Cyclohexane Raman Spectra: Analyzing the 802 cm-1 and 2853 cm-1 Peaks

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The discussion centers on the Raman spectra of cyclohexane, specifically the 802 cm-1 and 2853 cm-1 peaks, which show conflicting intensity results across different sources and instruments. Participants explore the factors influencing peak intensity, including excitation laser wavelength, sample preparation, and instrument calibration. The 802 cm-1 peak corresponds to ring breathing, while the 2853 cm-1 peak relates to symmetric CH2 stretching. There is no definitive answer regarding which peak should consistently be higher, as variations can arise from different spectrometer responses and calibration methods. Calibration is essential for achieving comparable results across instruments, but the inherent wavelength dependence of Raman cross-sections complicates this process. The conversation highlights the importance of understanding instrument response and calibration techniques, particularly when using luminescent sources for accurate intensity measurements. Ultimately, the discussion emphasizes the need for careful calibration and the challenges of achieving consistent results across different Raman systems.
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TeethWhitener said:
I’ve reached the end of what I can tell you about Raman calibration standards. Maybe someone else here can better address your concerns.

I have understood it all already now. And I found out my wine purity raman analyzer software can take calibration spectra of light luminescent sources and do the internal response calibration for right intensity. Without all the stuff you shared. I couldn't have gotten the idea especially i'd be calibrating focus too. And I will order the luminescent reference material for it. Thanks a lot for all the help. Appreciate it so much! Here is a toast to the favorite century-old wine :)
 

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