Porous functionalized polymers enable generating and transporting hyperpolarized mixtures of metabolites. - El Daraï T; Cousin SF; Stern Q; Ceillier M; Kempf J; Eshchenko D; Melzi R; Schnell M; Gremillard L; Bornet A; Milani J; Vuichoud B; et al. (Nature communications, 2021)