Time resolved FT EPR study of the decarboxylation following photo-induced electron transfer between α-amino acids and anthraquinone-2,6-disulfonic acid in aqueous solution
作者:Jian-Ming Lü、L. M. Wu、J. Geimer、D. Beckert
DOI:10.1039/b100931l
日期:——
Using laser photolysis of basic anaerobic aqueous solutions of α-glycine, L-α-alanine and α–aminoisobutyric acid containing anthraquinone-2,6-disulfonic acid the two spin-polarized (CIDEP) C•R1R2NH2 and NH2C•R1COO− radicals (R1, R2 = H or CH3) and the radical anion of anthraquinone-2,6-disulfonic acid were detected by time resolved Fourier transform electron paramagnetic resonance (FT EPR) spectroscopy
使用激光光解 α-甘氨酸、L-α-丙氨酸和含有蒽醌-2,6-二磺酸的 α-氨基异丁酸的碱性厌氧水溶液,两个自旋极化 (CIDEP) C•R1R2NH2 和 NH2C•R1COO- 自由基 (通过时间分辨傅里叶变换电子顺磁共振(FT EPR)光谱法检测R1、R2 = H或CH3)和蒽醌-2,6-二磺酸的自由基阴离子。FT EPR 结果表明,α-甘氨酸、L-α-丙氨酸和 α-氨基异丁酸被蒽醌-2,6-二磺酸的自旋极化光激发三重态通过单电子转移和快速氧化脱羧。在竞争反应通道中,醌三重态通过氢转移从 α-甘氨酸和 α-丙氨酸衰变,产生 NH2C•R1COO- 自由基。