Sensitized triplet-triplet annihilation upconversion in water and its application to photochemical transformations.

ABSTRACT: Sensitized triplet-triplet annihilation (TTA) is a promising mechanism for solar energy conversion, but so far its application has been practically completely limited to organic solvents and self-assembled or solid state systems. Combining water-soluble ruthenium complex-pyrene dyads with particularly long excited-state lifetimes as sensitizers and highly fluorescent commercial anthracenes as acceptors/annihilators, we were able to achieve green-to-violet upconversion with unprecedented quantum yields in pure water. Compared to the only known system exploiting sensitized TTA in homogeneous aqueous solution, we improve the overall photon upconversion efficiency by a full order of magnitude and present the very first example for a chemical transformation on a laboratory scale via upco

SUBMITTER: Kerzig C 

PROVIDER: S-EPMC6115628 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature