Re(I) Complexes as Backbone Substituents and Cross-Linking Agents for Hybrid Luminescent Polysiloxanes and Silicone Rubbers

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 c...

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Bibliographic Details
Main 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
Format: Article
Language:English
Published: MDPI AG 2021-11-01
Series:Molecules
Subjects:
Online Access:https://www.mdpi.com/1420-3049/26/22/6866
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Summary: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-<i>co</i>-dimethylsiloxane) (N<sub>3</sub>-PDMS) was synthesized for incorporation of azide function in polysiloxane chain. [Re(CO)<sub>3</sub>(MeCN)(5-(4-ethynylphenyl)-2,2′-bipyridine)]OTf (Re1) luminescent complex was used to prepare a luminescent copolymer with N<sub>3</sub>-PDMS (Re1-PDMS), while [Re(CO)<sub>3</sub>Cl(5,5′-diethynyl-2,2′-bipyridine)] (Re2) was used as a luminescent cross-linking agent of N<sub>3</sub>-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.
ISSN:1420-3049