Low-Power Upconversion in Poly(Mannitol-Sebacate) Networks with Tethered Diphenylanthracene and Palladium Porphyrin

  • Soo-Hyon Lee
  • Águeda Sonseca
  • Roberto Vadrucci
  • Enrique Giménez
  • E. Johan Foster
  • Yoan C. SimonEmail author


Efforts to fabricate low-power upconverting solid-state systems have rapidly increased in the past decade because of their possible application in several fields such as bio-imaging, drug delivery, solar harvesting or displays. The synthesis of upconverting cross-linked polyester rubbers with covalently tethered chromophores is presented here. Cross-linked films were prepared by reacting a poly(mannitol-sebacate) pre-polymer with 9,10-bis(4-hydroxymethylphenyl) anthracene (DPA-(CH2OH)2) and palladium mesoporphyrin IX. These chromophores served as emitters and sensitizers, respectively, and through a cascade of photophysical events, resulted in an anti-Stokes shifted emission. Indeed, blue emission (~440 nm) of these solid materials was detected upon excitation at 543 nm with a green laser and the power dependence of integrated upconverted intensity versus excitation was examined. The new materials display upconversion at power densities as low as 32 mW/cm2, and do not display phase de-mixing, which has been identified as an obstacle in rubbery blends comprising untethered chromophores.

Graphical Abstract

ToC Low-power upconverting cross-linked polyester with tethered chromophores was synthesized by polycondensation of poly(mannitol-sebacate) pre-polymers with 9,10-bis(4-hydroxymethylphenyl) anthracene and palladium mesoporphyrin IX. Upconverted blue fluorescence (440 nm) of these solid materials is detected upon excitation at 543 nm with a green laser and the power dependence of integrated upconverted intensity versus excitation is examined in this study.


Light upconversion Triplet–triplet annihilation Poly(mannitol-sebacate)s Polycondensation Upconverting elastomer 



The authors are thankful for the financial support of the Swiss National Science Foundation (200021_13540/1 and 200020_152968), Spanish Ministry of Economy and Competitiveness (Project MAT2010/21494-C03) and the Adolphe Merkle Foundation. The authors thank Prof. Christoph Weder for his help and support.

Supplementary material

10904_2014_63_MOESM1_ESM.docx (337 kb)
Absorption and fluorescence emission spectra, TGA, and DSC data.Supplementary material 1 (DOCX 336 kb)


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Soo-Hyon Lee
    • 1
  • Águeda Sonseca
    • 2
  • Roberto Vadrucci
    • 1
  • Enrique Giménez
    • 2
  • E. Johan Foster
    • 3
  • Yoan C. Simon
    • 1
    Email author
  1. 1.Adolphe Merkle InstituteUniversity of FribourgMarlySwitzerland
  2. 2.Instituto de Tecnología de MaterialesUniversidad Politécnica de ValenciaValenciaSpain
  3. 3.Department of Materials Science and EngineeringVirginia TechBlacksburgUSA

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