Low-Power Upconversion in Poly(Mannitol-Sebacate) Networks with Tethered Diphenylanthracene and Palladium Porphyrin
- 456 Downloads
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.
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.
KeywordsLight 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.
- 1.C. A. Parker, C. G. Hatchard. P. Chem. Soc. London, 386–387 (1962)Google Scholar
- 13.A. Monguzzi, J. Mezyk, F. Scotognella, R. Tubino, F. Meinardi, Phys. Rev. B 78(195112), 1–5 (2008)Google Scholar
- 14.A. Monguzzi, R. Tubino, F. Meinardi, Phys. Rev. B 77, 155122-1-4 (2008)Google Scholar
- 21.S. Baluschev, P.E. Keivanidis, G. Wegner, J. Jacob, A.C. Grimsdale, K. Mullen, T. Miteva, A. Yasuda, G. Nelles, Appl. Phys. Lett. 86, 1–3 (2005)Google Scholar
- 26.A. Mahdavi, L. Ferreira, C. Sundback, J.W. Nichol, E.P. Chan, D.J.D. Carter, C.J. Bettinger, S. Patanavanich, L. Chignozha, E. Ben-Joseph, A. Galakatos, H. Pryor, I. Pomerantseva, P.T. Masiakos, W. Faquin, A. Zumbuehl, S. Hong, J. Borenstein, J. Vacanti, R. Langer, J.M. Karp, Proc. Natl. Acad. Sci. USA 105, 2307–2312 (2008)CrossRefGoogle Scholar
- 27.A. Sonseca, S. Camarero-Espinosa, L. Peponi, C. Weder, E.J. Foster, J.M. Kenny, E. Giménez, J. Polym. Sci. Part A. (2014). doi: 10.1002/pola.27367
- 31.S. H. Lee, M. A. Ayer, R. Vadrucci, C. Weder, Y. C. Simon, Polym. Chem. (2014)Google Scholar
- 33.R. R. Islangulov, T. N. Singh, J. Lott, C. Weder, F. N. Castellano. Abstr. Pap. Am. Chem. Soc. 235 (2008)Google Scholar