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.
a) Methods of altering macrocycle conformation: (1) metalation; (2) N‐substitution; (3) covalent strapping of macrocycle; (4) sterically demanding peripheral substituents; [5] b) Illustrations of the porphyrin macrocycle undergoing the saddle, ruffle, dome and wave out‐of‐plane distortions. [7]
