Re(I) Complexes as Backbone Substituents and Cross-Linking Agents for Hybrid Luminescent Polysiloxanes and Silicone Rubbers |
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| Authors: | Egor M. Baranovskii Victoria V. Khistiaeva Konstantin V. Deriabin Stanislav K. Petrovskii Igor O. Koshevoy Ilya E. Kolesnikov Elena V. Grachova Regina M. Islamova |
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| Affiliation: | 1.Institute of Chemistry, St Petersburg University, 198504 St. Petersburg, Russia; (E.M.B.); (V.V.K.); (K.V.D.); (S.K.P.);2.Department of Chemistry, University of Eastern Finland, 80101 Joensuu, Finland;3.Center for Optical and Laser Materials Research, Research Park of St Petersburg University, 198504 St. Petersburg, Russia; |
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| Abstract: | This study focuses on the synthesis of hybrid luminescent polysiloxanes and silicone rubbers grafted by organometallic rhenium(I) complexes using Cu(I)-catalyzed azido-alkyne cycloaddition (CuAAC). The design of the rhenium(I) complexes includes using a diimine ligand to create an MLCT luminescent center and the introduction of a triple C≡C bond on the periphery of the ligand environment to provide click-reaction capability. Poly(3-azidopropylmethylsiloxane-co-dimethylsiloxane) (N3-PDMS) was synthesized for incorporation of azide function in polysiloxane chain. [Re(CO)3(MeCN)(5-(4-ethynylphenyl)-2,2′-bipyridine)]OTf (Re1) luminescent complex was used to prepare a luminescent copolymer with N3-PDMS (Re1-PDMS), while [Re(CO)3Cl(5,5′-diethynyl-2,2′-bipyridine)] (Re2) was used as a luminescent cross-linking agent of N3-PDMS to obtain luminescent silicone rubber (Re2-PDMS). The examination of photophysical properties of the hybrid polymer materials obtained show that emission profile of Re(I) moiety remains unchanged and metallocenter allows to control the creation of polysiloxane-based materials with specified properties. |
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| Keywords: | functional polysiloxanes rhenium complexes luminescent polysiloxanes luminescent silicone rubbers azide-alkyne cycloaddition |
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