Insight into the crystallization of amorphous imine-linked polymer networks to 2D covalent organic frameworks

We explore the crystallization of a high surface area imine-linked two-dimensional covalent organic framework (2D COF). The growth process reveals rapid initial formation of an amorphous network that subsequently crystallizes into the layered 2D network. The metastable amorphous polymer may be isolated and resubjected to growth conditions to form the COF. These experiments provide the first mechanistic insight into the mechanism of imine-linked 2D COF formation, which is distinct from that of boronate-ester linked COFs.

• NS
  National Science Foundation

  Awards: DMR-1120296, CHE-1056657
• AP
  Alfred P. Sloan Foundation
• CA
  Camille and Henry Dreyfus Foundation
• RC
  Research Corporation for Scientific Advancement
• CC
  Cornell Center for Materials Research
• MR
  Materials Research Science and Engineering Center, Harvard University