Fujiwara Saiya, Hosoyamada Masanori, Tateishi Kenichiro, Uesaka Tomohiro, Ideta Keiko, Kimizuka Nobuo, Yanai Nobuhiro
Department of Chemistry and Biochemistry, Graduate School of Engineering, Center for Molecular Systems (CMS) , Kyushu University , 744 Moto-oka , Nishi-ku, Fukuoka 819-0395 , Japan.
Cluster for Pioneering Research , RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan.
J Am Chem Soc. 2018 Nov 21;140(46):15606-15610. doi: 10.1021/jacs.8b10121. Epub 2018 Nov 7.
While dynamic nuclear polarization based on photoexcited triplet electrons (triplet-DNP) has the potential to hyperpolarize nuclear spins of target substrates in the low magnetic field at room temperature, there has been no triplet-DNP system offering structural rigidity and substrate accessibility. Here, we report the first example of triplet-DNP of nanoporous metal-organic frameworks. Accommodation of a carboxylate-modified pentacene derivative in a partially deuterated ZIF-8 (D-ZIF-8) results in a clear H NMR signal enhancement over thermal equilibrium.
基于光激发三重态电子的动态核极化（三重态-DNP）有潜力在室温下的低磁场中使目标底物的核自旋超极化，但一直没有提供结构刚性和底物可及性的三重态-DNP系统。在此，我们报道了纳米多孔金属有机框架的三重态-DNP的首个实例。在部分氘代的ZIF-8（D-ZIF-8）中容纳羧酸盐修饰的并五苯衍生物，导致相对于热平衡有明显的氢核磁共振信号增强。
