The Vapor Phase Fluorescence and its Relationship to the Photolysis of Propionaldehyde and the Butyraldehydes

Abstract

The effects of pressure, temperature and wavelength of the fluorescence of n-butyraldehyde and iso-butyraldehyde have been investigated (l). At 3340 A, the fluorescence yield decreases slightly with increase

Gas phase UV and IR absorption spectra of CxF2x+1CHO (x = 1–4)

“…1, the spectra of C 2 F 5 CHO and C 3 F 7 CHO measured in the present work are in good agreement with the absorption cross-sections reported by Borkowski and Ausloos [12], and Pritchard et al [46] for these species. There are no literature data for C 4 F 9 CHO with which we can compare our results.…”

“…1, our spectrum for CF 3 CHO agrees well with the previous measurements by Borkowski and Ausloos [12], Francisco and Williams [14], Meller et al [15], and Sellevåg et al [16]. The spectrum for CF 3 CHO reported by Lucazeau and Sandorfy [13] is similar in shape to that measured herein but is approximately 30% less intense.…”

“…The spectrum for CF 3 CHO reported by Lucazeau and Sandorfy [13] is similar in shape to that measured herein but is approximately 30% less intense. In light of the excellent agreement between the spectral data reported herein and by Borkowski and Ausloos [12], Francisco and Williams [14], Meller et al [13], and Sellevåg et al [16] it would appear that Lucazeau and Sandorfy [13] underestimated the absorption of CF 3 CHO by approximately 30%.…”

“…The filled triangles, open triangles, open circles, and blue circles in the middle panel are the data for CF 3 CHO from Borkowski and Ausloos [12], Francisco and Williams [14], Meller et al [13], and Sellevåg et al [16], respectively. Triangles and diamond in the top panel are data for C 2 F 5 CHO from Borkowski and Ausloos [12] and Pritchard et al [46], respectively. The inverted open triangle is a datum for C 3 F 7 CHO from Pritchard et al [46].…”

“…While the UV absorption spectrum of CF 3 CHO has been measured in several studies [12][13][14][15][16] and is well defined, there is little information available concerning the UV absorption spectra of longer chain, and potentially environmentally more significant, perfluoroaldehydes. At the start of the present work there was no information available concerning the photodissociation quantum yields of C x F 2x+1 CHO.…”