Fig. 1: The structures of several HOFs.
From: Taming nitroformate through encapsulation with nitrogen-rich hydrogen-bonded organic frameworks
a HOF-19 strengthened by coupled N···H bonds with large pores and high thermostability; b HOF-TCBP strengthened by coupled O···H bonds with large pores and high thermostability; c Self-assembly of HOF-NF by melaminiumnitroformate, and 3,6,7-triamino-7H-[1,2,4]triazolo[4,3-b][1,2,4]triazole (in this work).
