Ultralarge Free‐Standing Imine‐Based Covalent Organic Framework Membranes Fabricated via Compression oleh Jesús Á. Martín‐Illán, José Antonio Suárez, Julio Gómez‐Herrero, Pablo Ares, Daniel Gallego‐Fuente, Youdong Cheng, Dan Zhao, Daniel Maspoch, Félix Zamora