The cyclometalated iridium(III) compounds have been widely explored due to outstanding photo-physical properties and multiple anticancer activity. In this paper, three cyclometalated iridium(III) compounds [Ir(ppy)2(DBDIP)]PF6 (5a), [Ir(bzq)2(DBDIP)]PF6 (5b), [Ir(piq)2(DBDIP)]PF6 (5c)...