Fig. 2: Structure illustration and characterizations of PP-DEG-Acid.
From: Highly efficient solar steam evaporation via elastic polymer covalent organic frameworks monolith
a PP-DEG-Acid is synthesized by cyclic tetramerization of pyrrole with DEG-(Ph-CHO)2 to form porphyrin rings. b N2 and CO2 sorption isotherms of PP-DEG-Acid at 77 K and 273 K, respectively. c FT-IR spectroscopy of PP-DEG-Acid and DEG-(Ph-CHO)2 in the range of 400–2000 cm−1. d Solid-state 13C CP/MAS NMR spectrum of PP-DEG-Acid (the inset image shows the structure with labeled carbons). Digital photo (e), the water contact angle of the surface (f) and SEM image (g) of PP-DEG-Acid foam.
