Synthesis of ZIF‐8 and ZIF‐67 by Steam‐Assisted Conversion and an Investigation of Their Tribological Behaviors

Water difference: Using H2O as the reaction medium in a conventional hydrothermal synthesis gives two nonporous materials with dense dia frameworks, dia(Zn) and dia(Co), from 2-methylimidazole and M(OAc)2 (M=Zn, Co; see structures, left). However, separation of the H2O and a solid mixture of the same starting materials in a steam-assisted conversion gives open-framework porous materials, ZIF-8 and ZIF-67 (right). Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.