On Water Growth of Continuous Thin Films of Two‐Dimensional Covalent Organic Frameworks with Large Single‐Crystal Domains

Comprehensive Summary A core feature of two‐dimensional covalent organic frameworks is crystallinity, but it remains challenging to gain their thin films with high crystallinity. Here, we presented growth of thin films of two‐dimensional covalent organic frameworks with an average domain size of ~2.83 μm 2 and maximum domain size of up to ~26.19 μm 2 using amphiphilic glycine derivatives on water surface. We envisage that this work will inspire the growth of a wide variety of organic two‐dimensional materials with high crystallinity and boost their structure property investigations.