Temperature dependent vibrational modes of glycosidic bond in disaccharide sugars.
We studied the temperature dependent vibrational modes of the glycosidic bond in trehalose, sucrose, and maltose at wavenumbers ranging from 1000 to 1200 cm(-1). We found that the slope of temperature dependent Raman shifts of the glycosidic bond in trehalose and sucrose changed at temperatures around 120 degrees C, indicating a bond length or a bond angle (dihedral and torsional angles) change. However, we did not observe any slope change in maltose because the melting temperature of maltose is very close to 120 degrees C. We also found, at temperatures below 120 degrees C, that Raman shifts of the vibrational modes of the glycosidic bond in trehalose showed the strongest temperature dependence among the three disaccharides.
Seo
Jeong-Ah
JA
Department of Nanomaterials and BK21Nano Fusion Technology Division, Pusan National University, Miryang 627-706, Republic of Korea.
Kwon
Hyun-Joung
HJ
Kim
Hyung Kook
HK
Hwang
Yoon-Hwae
YH
D004187:Disaccharides / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014732:Vibration; D014961:X-Ray Diffraction
D004187:Disaccharides; D006027:Glycosides