Effect of nitroxide radicals on chemically induced dynamic electron polarization of spin-correlated radical pairs in aqueous micellar solutions of sodium dodecyl sulfate
作者:V. R. Gorelik、V. F. Tarasov、S. R. Shakirov、E. G. Bagryanskaya
DOI:10.1007/s11172-008-0184-7
日期:2008.7
studied by ESR and pulse laser photolysis techniques. In all the systems studied, the stable nitroxide radicals exert no effect on the shape of the ESR spectra of the SCRPs (in particular, on the shape of their antiphase structure) and on the decay kinetics of the ESR signal of the SCRPs. In the SDS micelles, the electron spin polarization transfer from the nonequilibrium electron spin states of the
通过 ESR 和脉冲激光光解技术研究了由自旋相关自由基对 (SCRP) 和稳定的氮氧自由基组成的多自旋系统,位于十二烷基硫酸钠 (SDS) 胶束中。在所有研究的系统中,稳定的氮氧自由基对 SCRP 的 ESR 光谱的形状(特别是它们的反相结构的形状)和 SCRP 的 ESR 信号的衰减动力学没有影响。在 SDS 胶束中,来自分子三联体(SCRP 前体)的非平衡电子自旋态的电子自旋极化转移是产生氮氧自由基电子自旋极化的最有效机制。实验数据还表明,氮氧自由基和 SCRP 自由基很可能均匀分布在胶束相中。