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Photochemical upconversion in water.

Karim A El Roz1, Felix N Castellano

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Chemical Communications (Cambridge, England)
|October 13, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed water-soluble sensitizers for efficient photochemical upconversion in pure water. This breakthrough avoids the need for hydrophobic hosts or surfactants, advancing sustainable energy applications.

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Area of Science:

  • Photochemistry
  • Materials Science
  • Sustainable Energy

Background:

  • Photochemical upconversion (UC) is a promising technology for solar energy applications.
  • A key challenge is achieving UC in aqueous media without additives.
  • Existing methods often rely on hydrophobic hosts or surfactants, limiting environmental compatibility.

Purpose of the Study:

  • To identify suitable chromophore combinations for photochemical upconversion in neat water.
  • To demonstrate efficient UC in pure water, free from hydrophobic hosts or surfactants.
  • To advance the development of environmentally friendly UC systems.

Main Methods:

  • Utilized water-soluble Ruthenium(II) (Ru(ii)) metal-to-ligand charge transfer (MLCT) sensitizers.
  • Employed 9-anthracenecarboxylate (AnCO2-) and 1-pyrenecarboxylate (PyCO2-) as acceptor molecules.
  • Conducted experiments in neat H2O to assess UC efficiency.

Main Results:

  • Achieved successful photochemical upconversion in pure water using the designed sensitizer systems.
  • Demonstrated the efficacy of Ru(ii) MLCT sensitizers with AnCO2- and PyCO2- in aqueous media.
  • Confirmed the absence of required hydrophobic hosts or surfactant additives for UC.

Conclusions:

  • Developed a novel approach for photochemical upconversion in aqueous environments.
  • Overcame the challenge of performing UC in pure water, enhancing its practical applicability.
  • Paved the way for greener and more sustainable photochemical upconversion technologies.