Heteroporous 2D Covalent Organic Frameworks With Functional Differentiated Crown‐Amino Pores Constructed by Node Engineering for Gold Recovery
Based on network chemistry, diverse topological structures and synthetic building blocks provide multifaceted combinations for the construction of two‐dimensional covalent organic frameworks (2D COFs). Herein, we employ the hcb topology as a template, replacing the conventional C3 and C2 configurations with a combinati...