Open AccessThe absorption spectrum of acetaldehyde in the vacuum ultra-violet
Author(s) -
Arthur Donald Walsh
Publication year - 1946
Publication title -
proceedings of the royal society of london a mathematical and physical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.814
H-Index - 135
eISSN - 2053-9169
pISSN - 0080-4630
DOI - 10.1098/rspa.1946.0011
Subject(s) - rydberg formula , polyatomic ion , excited state , ultra violet , absorption spectroscopy , atomic physics , ionization , electron , absorption (acoustics) , molecule , chemistry , ion , materials science , physics , optoelectronics , optics , quantum mechanics , organic chemistry
The absorption spectrum of acetaldehyde has been photographed in the vacuum ultra violet. Three Rydberg series were found, all leading to the same limit. For the first of these no less than sixteen members were observed, enabling the ionization potential to be given as 10·1811 ±0·0007 V. This is the most extensive Rydberg series so far found in polyatomic molecules. The excited electron is one of the non-bonding 2p y oxygen electrons. The nature of the electronic transitions responsible for the various regions of the spectrum is discussed.
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