Raman Spectra of Typical Solvents at Room Temperature and Under Liquid Nitrogen

Compton, R. N.; Hammer, Nathan I.; Lambert, Ethan C.; Hager, Josef

doi:10.1007/978-3-030-99395-5_8

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“…As increases in Raman activity have yet to be demonstrated in any RUN studies and are not present in the room temperature sample, we accredit these increases to the encapsulation of C 60 in the ice matrix. This is supported by the loss of water's vibrational mode seen under liquid nitrogen [42] as aggregation around C 60 limits the degrees of freedom within the hydrogen bonded lattice (see Supporting Information). High dielectrics provide an opportunity for the scattered light to undergo whispering‐gallery modes (WGM), [43,44] causing light waves to resonate within dielectric spheres much larger than the wavelength of the incident light through a series of total internal reflections.…”

Section: Resultsmentioning

confidence: 90%

Guest‐Host Raman under Liquid Nitrogen Spectroscopy for the Acquisition of Improved Vibrational Spectra of Solids

et al. 2022

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Guest‐host Raman under liquid nitrogen spectroscopy (GHRUNS) is introduced whereby solid‐state guest molecules are isolated inside cage‐like host environments for the facile acquisition of their Raman spectra. This convenient method features reduced fluorescence, the analysis of populations in their ground states, and increased signal to noise ratios. Samples are also preserved through the reduction of thermal degradation and oxidation. To demonstrate the benefits of this new method, Raman spectra of the ubiquitous molecule C60 inside a cage of water ice are presented. Using this technique, a new normal mode of C60 is elucidated. The GHRUNS methodology is of interest to those seeking to acquire and characterize the vibrational spectra, structure, and properties of emissive, air‐sensitive molecules.

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Section: Resultsmentioning

confidence: 90%