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THE PROTONATION OF A RETINYL SCHIFF BASE
Author(s) -
BADILESCU SIMONA,
ALENCASTRO RICARDO BICCA,
LETHANH HOA,
RlCHER GUY,
SANDORFY CAMILLE,
VAUDREUIL PIERREPAUL,
VOCELLE DANIEL
Publication year - 1989
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1989.tb04112.x
Subject(s) - protonation , schiff base , chemistry , stereochemistry , organic chemistry , ion
The hydrogen bonding‐protonation equilibrium for retinyl Schiff base/propionic acid or 3‐chloropropionic acid systems was examined by Fourier transform infrared spectroscopy in non polar solutions at temperatures ranging from 25°C to about ‐150°C. The spectra give evidence for the gradual increase in the degree of protonation as temperature is lowered. The bearing of this on applying low temperature spectroscopic results to physiological conditions in rhodopsin research is discussed.