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.
Secondary-sphere strategies known to improve catalytic selectivity and activity include pendent proton donors/shuttles in the form of Brønsted sites, charged moieties, sterically demanding functional groups, bimetallic active species, and stoichiometric participation of alkali and alkaline earth metal cations.
