リボフラビン酪酸エステルの固相における色調と化学構造に関する研究(第2報)
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概要
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Riboflavin tetrabutyrate of yellow powder (RTB C) was prepared from a methanol-H_2O (45 : 55) solvent and various spectra were compared with those of RTB A. The emission spectra around 500-600 nm explained the color of RTB C; a maximum of RTB C was about 40 nm shorter than RTB A. Powder X-ray diffraction pattern of RTB C showed an aggregate of fine crystallites. The differences in infrared spectra between RTB A and C at 3430,1380,880-865 and 465-445 cm^<-1>, assigned as NH on isoalloxazine ring, suggested a weak hydrogen-bond formation of RTB C. RTB A, B (a charge transfer type) and C changed their phase each other by treating them with solvents or by heating.
- 公益社団法人日本薬学会の論文
- 1988-01-25