I have never seen iridium porphyrins before (I haven't seen rhoidum ones too.). So, it is interesting for me to read this.
Due to my lack of knowledge, there are a few things that I couldn't understand. For example, the article says "Iridium(III) porphyrins are thus only metastable reagents for substrate reactions in strongly basic methanol." I have no idea what "basic methanol" is.