Hf/porphyrin-based metal-organic framework PCN-224 for CO2 cycloaddition with epoxides - Carrasco, Sergio; Orcajo, Gisela; Martinez, Fernando; Imaz, Inhar; Arenas-Esteban, Daniel; Maspoch, Daniel; Bals, Sara; Calleja, Guillermo; Horcajada, Patricia (Materials Today Advances, 2023)