论文部分内容阅读
光化学诱导动态核极化(photo-CIDNP)是一种在光照条件下由于产生非玻尔兹曼核自旋极化而使核磁共振(NMR)波谱信号强度发生明显变化的效应。这种效应在液体NMR中已为人所熟知,并通过经典的自由基对机理得到解释。固态photo-CIDNP效应发现的较晚,本文介绍了在光合反应中心及蓝光受体中发现的固态photo-CIDNP效应,详细阐述了固态photo-CIDNP效应产生的自由基对自旋动力学的机理,包括三旋混合(TSM)、衰变差异(DD)和弛豫差异(DR),重点介绍了类球红杆菌光合反应中心固态photo-CIDNP效应的磁场依赖性,这种场依赖性在同一分子中的不同核之间表现出明显的差异。本文综述了固态photo-CIDNP效应的现象、理论及其磁场依赖特性的最新进展。
Photochemical-induced dynamic nuclear polarization (photo-CIDNP) is an effect that changes the signal intensity of nuclear magnetic resonance (NMR) spectra significantly under non-Boltzmann spin-polarization under illumination. This effect is well known in liquid NMR and is explained by classical free radical pair mechanisms. The photo-CIDNP effect of solid-state photo-CIDNP was found later, and the solid-state photo-CIDNP effect found in the photosynthetic reaction center and the blue photoreceptor was introduced. The mechanism of the spin-kinetics of free radicals generated by the solid- Including three-spin mixing (TSM), decay difference (DD), and relaxation difference (DR), highlighting the magnetic field dependence of the solid-state photo-CIDNP effect of the C. aeruginosa photosystem reaction center in the same molecule The differences between the different nuclei showed significant differences. This review summarizes the recent advances in the theory and field-dependent properties of solid-state photo-CIDNP effects.