US 12,343,455 B2
Photocatalytic generation of singlet oxygen for air purification
Robert H. Grubbs, South Pasadena, CA (US); Carl M. Blumenfeld, West Hills, CA (US); Harry B. Gray, Pasadena, CA (US); and George R. Rossman, Pasadena, CA (US)
Assigned to California Institute of Technology, Pasadena, CA (US)
Filed by California Institute of Technology, Pasadena, CA (US)
Filed on Nov. 11, 2021, as Appl. No. 17/524,654.
Claims priority of provisional application 63/112,732, filed on Nov. 12, 2020.
Prior Publication US 2022/0211894 A1, Jul. 7, 2022
Int. Cl. A61L 9/015 (2006.01); A61L 2/20 (2006.01); B01J 27/132 (2006.01); B01J 31/16 (2006.01); B01J 35/39 (2024.01); C01B 13/02 (2006.01); A61L 101/02 (2006.01)
CPC A61L 9/015 (2013.01) [A61L 2/20 (2013.01); B01J 27/132 (2013.01); B01J 31/16 (2013.01); B01J 35/39 (2024.01); C01B 13/02 (2013.01); A61L 2101/02 (2020.08); A61L 2202/11 (2013.01); A61L 2202/15 (2013.01); A61L 2209/16 (2013.01); A61L 2209/21 (2013.01); B01J 2531/64 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A system for generating singlet oxygen in a gas, the system comprising:
a substrate; and
hexanuclear clusters operably immobilized on at least a portion of the substrate;
wherein each of the hexanuclear clusters comprises a photosensitive octahedral core complex characterized by formula FX1a:
M6X8  (FX1a);
wherein each M is W;
wherein each X is independently a halide anion ligand;
wherein the hexanuclear clusters are exposed to the gas and the gas comprises at least O2 gas;
wherein the hexanuclear clusters are exposed to a light;
wherein each of the hexanuclear clusters is a photosensitizer configured to generate the gaseous singlet oxygen when irradiated by the light in the presence of the O2 gas; and
wherein the hexanuclear clusters are immobilized on the surface of the substrate via non-covalent association between the hexanuclear clusters and silane linker groups, the silane linker groups being covalently attached to the surface of the substrate.