Institut de Ciència de Materials de Barcelona ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Barcelona, Spain.
Org Lett. 2014 Oct 17;16(20):5402-5. doi: 10.1021/ol502644x. Epub 2014 Oct 3.
The synthesis and characterization of a novel trityl-TEMPO biradical and the investigation of its properties as Dynamic Nuclear Polarization (DNP) polarizing agent are reported. Comparison with a structurally related monoradical (PTM-TEMPE) or mixtures of the two monoradical components reveals that the biradical has a much higher polarization efficiency and a faster polarization buildup. This offers the possibility of faster recycling further contributing to its efficiency as a polarizing agent.
报道了一种新型三苯甲基-TEMPO 双自由基的合成与表征，并研究了其作为动态核极化（DNP）增敏剂的性质。与结构相关的单自由基（PTM-TEMPE）或两者的混合物进行比较，发现双自由基具有更高的极化效率和更快的极化建立速度。这为进一步提高其作为增敏剂的效率提供了更快的循环回收的可能性。
