TY - JOUR
T1 - Low-frequency vibrational modes of riboflavin and related compounds
AU - Takahashi, Masae
AU - Ishikawa, Yoichi
AU - Nishizawa, Jun Ichi
AU - Ito, Hiromasa
N1 - Funding Information:
M.T. gratefully acknowledge the support of the Ministry of Education, Culture, Sports, Science and Technology of Japan (Grant No. 16310080) and the Hayashi Memorial Foundation. This work was partly supported by a special coordination fund (‘Terahertz Optics Project for Medical Application’, J.N.) of the Japan Ministry of Education, Culture, Sports, Science and Technology.
PY - 2005/1/11
Y1 - 2005/1/11
N2 - The low-frequency vibrations of riboflavin and related compounds (alloxazine, lumichrome, lumiflavin as the ring system and d-mannitol as the side-chain system) were observed by far-infrared (terahertz) spectroscopy. Vibrational mode assignments in this spectrally congested range were made using high precision quantum chemical calculations. These resonance frequencies located below 200 cm -1 indicate the existence of motions important for biological reactions. The observed absorption bands in the low-frequency region of riboflavin are assigned to the in-plane and out-of-plane-ring deformations of pyrimidine and isoalloxazine, and to the torsion modes of the ribityl chain.
AB - The low-frequency vibrations of riboflavin and related compounds (alloxazine, lumichrome, lumiflavin as the ring system and d-mannitol as the side-chain system) were observed by far-infrared (terahertz) spectroscopy. Vibrational mode assignments in this spectrally congested range were made using high precision quantum chemical calculations. These resonance frequencies located below 200 cm -1 indicate the existence of motions important for biological reactions. The observed absorption bands in the low-frequency region of riboflavin are assigned to the in-plane and out-of-plane-ring deformations of pyrimidine and isoalloxazine, and to the torsion modes of the ribityl chain.
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U2 - 10.1016/j.cplett.2004.11.108
DO - 10.1016/j.cplett.2004.11.108
M3 - Article
AN - SCOPUS:11144296965
SN - 0009-2614
VL - 401
SP - 475
EP - 482
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -