Open AccessPhysico-chemical studies of complex organic molecules. Part II.— Absorption spectra at low temperatures.
Author(s) -
F. P. Bowden,
S. D. D. Morris
Publication year - 1934
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1934.0241
Subject(s) - molecule , chemistry , spectral line , absorption (acoustics) , absorption spectroscopy , alcohol , analytical chemistry (journal) , absorption band , optics , environmental chemistry , organic chemistry , physics , astronomy
The absorption spectra of some important biological molecules have been measured at liquid air temperature. The bands of β carotene (in ethyl alcohol) become narrower and shift to 4990 A., 4670 A., and 4350 A., and a new band appears at 4.060 A. The ultra-violet band at 2700 A. becomes sharper but is little displaced. The main band of vitamin A concentrates at 3280 A. is shifted to 3350 A. and new bands appear at 2900 A., 2770 A., 2580 A, 2510 A., and 2430 A.