Microwave-Assisted Synthesis of Heteroleptic Ir(III)(+) Polypyridyl Complexes.
We report a rapid, one-pot, operationally simple, and scalable preparation of valuable cationic heteroleptic iridium(III) polypyridyl photosensitizers. This method takes advantage of two consecutive microwave irradiation steps in the same reactor vial, avoiding the need for additional reaction purifications. A number of known heteroleptic iridium(III) complexes are prepared in up to 96% yield. Notably, this method is demonstrated to provide the synthetically versatile photosensitizer [Ir(ppy)2(dtbbpy)]PF6 in >1 g quantities in less than 5 h of bench time. We envision this method will help accelerate future developments in visible-light-dependent chemistry.
Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.
Timothy M
TM
Monos
Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.
Alexandra C
AC
Sun
Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.
Rory C
RC
McAtee
Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.
James J
JJ
Devery
Department of Chemistry, Willard Henry Dow Laboratory, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.
Corey R J
CR
Stephenson