作者:Sandra Signorella、Rubén Lafarga、Laura Ciullo、Luis F. Sala
DOI:10.1016/0008-6215(94)84195-0
日期:1994.6
Abstract The oxidation of d -glucose by Cu(II) has been studied in NaAcO buffers within the pH range of 4–5 at 110°C. The observed pseudo-first-order rate constant is given by: a [AcO − ] + b /[H + ] + c [AcO − ][Glc] + d [Glc]/[H + ] 2 , where a = 5.3 ± 0.4 × 10 −4 s −1 M −1 , b = 1.30 ± 0.07 × 10 −8 s −1 M, c = 6.16 ± 0.04 × 10 −3 s −1 M −2 , and d = 3.2 ± 0.2 × 10 −13 s −1 M. This rate law corresponds
摘要研究了在110℃下pH范围为4-5的NaAcO缓冲液中Cu(II)对d-葡萄糖的氧化作用。观察到的拟一阶速率常数由下式给出:a [AcO-] + b / [H +] + c [AcO-] [Glc] + d [Glc] / [H +] 2,其中a = 5.3 ±0.4×10 -4 s -1 M -1,b = 1.30±0.07×10 -8 s -1 M,c = 6.16±0.04×10 -3 s -1 M -2,d = 3.2±0.2× 10 -13 s -1M。该速率定律对应于当使用比Cu(II)高十倍或更高的d-葡萄糖时葡萄糖酸和Cu(I)的形成。根据溶液中存在的CuOAc +氧化d-葡萄糖的可能机理,讨论了结果。