The ability of a hexanuclear molybdenum cluster, [Mo6I8(CH3COO)6]2-, to carry out, upon irradiation, singlet oxygen mediated photocatalytic oxygenation reactions has been tested. This complex has been also supported on a solid polymeric matrix, yielding an immobilized photosensitizer with remarkable photostability and recyclability. Preliminary studies of antibacterial photoinactivation of Staphylococcus aureus have been conducted, with positive results. ; The work at Universitat Jaume I was financially supported by Fundació Caixa Castelló/UJI (P1-1B2015-76). Technical assistance from the SCIC-UJI is acknowledged. M. M. thanks the Russian Foundation for Basic Research for research grant No. 16-33-60016. This study was also supported by grant CTQ2013-48767-C3-2-R from the Spanish Ministry of Science and Innovation, Spain and the European Regional Development Fund.