Nitronyl nitroxides (NitR) are a family of persistent radicals widely used in molecular magnetism and recently suggested as potential candidates for spintronic applications. In this paper we characterize by X- and W- band Electron Paramagnetic Resonance (EPR) spectroscopy the new radical S-4-(nitronyl nitroxide) benzyl ethanethioate (NitSAc) designed for assembling on Au surfaces. We determined the radical magnetic tensors and studied by X-band pulse EPR its spin relaxation behaviour in fluid and glassy solutions of toluene. A comparison with the well known nitroxide 3-carbamoyl-2,2,5,5-tetramethyl-3-pyrrolin-1-oxyl (CTPO) is afforded. The advantages of using NitSAc in technological applications are discussed on the basis of the slow spin relaxation demonstrated by this study.
硝基亚硝基氧化物(NitR)是广泛应用于分子磁学的一类持久性自由基,最近被认为是自旋电子应用的潜在候选自由基。在本文中,我们通过 X 波段和 W 波段电子顺磁共振(EPR)光谱分析了设计用于在
金表面组装的新自由基 S-4-(硝基亚硝氧)乙
硫酸苄酯(Nit
SAc)的特性。我们测定了自由基的磁张量,并通过 X 波段脉冲 EPR 研究了其在
甲苯的流体和
玻璃溶液中的自旋弛豫行为。我们将其与众所周知的 3-
氨基甲酰基-2,2,5,5-四甲基-3-吡咯啉-1-氧基(CTPO)进行了比较。根据这项研究证明的缓慢自旋弛豫,讨论了在技术应用中使用 Nit
SAc 的优势。