Jump to main content
Jump to site search

Issue 32, 2018
Previous Article Next Article

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

Author affiliations

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 upconversion in water. Specifically, we found that a thermodynamically challenging carbon–chlorine bond activation can be driven by green photons from an inexpensive continuous wave light source in the presence of dissolved oxygen. Our study is thus potentially relevant in the context of cleaning water from halogenated (toxic) contaminants and for sustainable photochemistry in the most environmentally friendly solvent.

Graphical abstract: Sensitized triplet–triplet annihilation upconversion in water and its application to photochemical transformations

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Apr 2018, accepted on 11 Jul 2018 and first published on 12 Jul 2018


Article type: Edge Article
DOI: 10.1039/C8SC01829D
Citation: Chem. Sci., 2018,9, 6670-6678
  • Open access: Creative Commons BY-NC license
  •   Request permissions

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

    C. Kerzig and O. S. Wenger, Chem. Sci., 2018, 9, 6670
    DOI: 10.1039/C8SC01829D

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements