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Low-temperature SIMS mass spectra of diethyl ether
Marina V Kosevich1, Vadim S Shelkovsky, Oleg A Boryak
1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine. mvkosevich@ilt.kharkov.ua
Journal of Mass Spectrometry : JMS
|June 10, 2003
Summary
Researchers obtained the first low-temperature secondary ion mass spectrum of diethyl ether. This involved carefully controlling experimental conditions to capture cluster-type spectra within minutes, revealing abundant protonated clusters and fragment ions.
Area of Science:
- Analytical Chemistry
- Physical Chemistry
- Spectroscopy
Background:
- Secondary ion mass spectrometry (SIMS) is a powerful surface analysis technique.
- Studying organic solvents at low temperatures provides insights into their molecular behavior and interactions.
- Diethyl ether is a common organic solvent with applications in various chemical processes.
Purpose of the Study:
- To obtain and analyze the secondary ion mass spectrum of diethyl ether at low temperatures.
- To investigate the formation and characteristics of cluster ions and fragment ions under these conditions.
- To compare the fragmentation patterns with those observed under high-energy electron impact.
Main Methods:
- Low-temperature secondary ion mass spectrometry (SIMS) was employed.
- Experimental conditions were optimized to achieve cluster-type spectra.
- Rapid spectrum detection was necessary due to the short lifetime of the liquid sample.
Main Results:
- The first low-temperature SIMS spectrum of diethyl ether was successfully recorded.
- Abundant protonated clusters (M(n).H+), fragment ions ([M(n)-H]+, [M(n)-15]+, etc.), and monohydrates were observed.
- The fragmentation pattern showed qualitative similarity to high-energy electron impact fragmentation.
Conclusions:
- Low-temperature SIMS is feasible for analyzing diethyl ether and similar organic solvents.
- The observed cluster and fragment ions provide valuable information about diethyl ether's behavior in the condensed phase.
- The findings contribute to understanding the fundamental properties of organic solvents under cryogenic conditions.