Figure 1.
Chemical structure of sulfonated poly(ether-ether-ketone) (SPEEK) polymer repeating unit and zeolitic imidazolate framework (ZIF)-8 and ZIF-67.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.