TY - JOUR
T1 - Study of the interaction of KF with carbohydrates in DMSO-d6 by 1H and 13C NMR spectroscopy
AU - Qrtiz, Pedro
AU - Reguera, Edilso
AU - Fernández-Bertraán, José
PY - 2002/1/28
Y1 - 2002/1/28
N2 - The interaction of KF with sugars (D-glucose, D-xylose, D-galactose, D-ribose, D-mannose, D-lyxose, cellobiose, maltose, maltotriose, amylose, saccharose and γ-cyclodextrin) were studied by 1H and 13C NMR spectroscopies in DMSO-d6. The main interactions are of the hydrogen bonding type between the sugar hydroxyl protons and the F- anions of KF. The shifts in mutarotation toward the β anomers are due to the breaking of the (OH)1· · ·(OH)2 intramolecular hydrogen bonds by F-, which destabilizes the α form in glucose, xylose, galactose and ribose. KF also attacks and breaks intermolecular hydrogen bond bridges as those observed between (OH)2 and (OH)3′ groups of neighboring hexose units in amylose.
AB - The interaction of KF with sugars (D-glucose, D-xylose, D-galactose, D-ribose, D-mannose, D-lyxose, cellobiose, maltose, maltotriose, amylose, saccharose and γ-cyclodextrin) were studied by 1H and 13C NMR spectroscopies in DMSO-d6. The main interactions are of the hydrogen bonding type between the sugar hydroxyl protons and the F- anions of KF. The shifts in mutarotation toward the β anomers are due to the breaking of the (OH)1· · ·(OH)2 intramolecular hydrogen bonds by F-, which destabilizes the α form in glucose, xylose, galactose and ribose. KF also attacks and breaks intermolecular hydrogen bond bridges as those observed between (OH)2 and (OH)3′ groups of neighboring hexose units in amylose.
KW - H and C NMR
KW - Hydrogen bonding
KW - Mutarotation
KW - Potassium fluoride
KW - Sugars
UR - http://www.scopus.com/inward/record.url?scp=0036007752&partnerID=8YFLogxK
U2 - 10.1016/S0022-1139(01)00399-2
DO - 10.1016/S0022-1139(01)00399-2
M3 - Artículo
SN - 0022-1139
VL - 113
SP - 7
EP - 12
JO - Journal of Fluorine Chemistry
JF - Journal of Fluorine Chemistry
IS - 1
ER -