Strong optical limiting capability of a triosmium cluster bonded indium porphyrin complex [(TPP)InOs3((mu)-H)2(CO)9 (µ-(eta)2-C5H4N)]

The metal–metal bonded indium porphyrin–osmium cluster complex [(TPP)InOs3((mu)-H)2(CO)9((mu)-(eta)2-C5H4N)] was first synthesized and characterized using the indium porphyrin hydride as the precursor. The complex has very good optical limiting performance with determined optical limiting threshold of 0.4 J cm–2.