INVESTIGATIONS ON THE POLARITY OF AQUEOUS -SOLUTIONS OF UREA AND VARIOUS SUGARS BY MEANS OF THE SOLVATOCHROMIC TECHNIQUE

Authors
SPANGE S KEUTEL D
Citation
S. Spange et D. Keutel, INVESTIGATIONS ON THE POLARITY OF AQUEOUS -SOLUTIONS OF UREA AND VARIOUS SUGARS BY MEANS OF THE SOLVATOCHROMIC TECHNIQUE, Liebigs Annalen der Chemie, (9), 1993, pp. 981-985
Citations number
39
Categorie Soggetti
Chemistry
Journal title
Liebigs Annalen der Chemie → ACNP
ISSN journal
01702041
Issue
9
Year of publication
1993
Pages
981 - 985
Database
ISI
SICI code
0170-2041(1993):9<981:IOTPOA>2.0.ZU;2-W
Abstract
The dipolarity/polarizability and acidity of aqueous solutions of urea derivatives and sugars have been investigated by means of the solvato chromic technique employing several indicator dyes such as various pyr idinium N-phenoxide betaine dyes, Michler's ketone and Fe(phen)2(CN)2. Increasing concentration of both urea and sugars decreases the polari ty and acidity of the aqueous solution as a whole. Advantageously, in the case of urea derivatives, increasing concentration significantly i mproves the polarizability of aqueous solutions, which is responsible for the solubility of hydrophobic compounds in water.