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.
Highlights
Polysiloxanes have unique and useful properties such as high elasticity, transparency, bioinertness, thermal resistance, and gas permeability [1,2,3,4]
Hybrid polysiloxane and silicone rubber were synthesized by a click chemistry approach using the developed procedure of Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) between polymer and organometallic Re(I) complexes
Functionalization of copolysiloxane with an organometallic complex Re1 containing terminal C≡C bond at the periphery resulted in the synthesis of a new copolymer Re1-PDMS
Summary
Polysiloxanes have unique and useful properties such as high elasticity, transparency, bioinertness, thermal resistance, and gas permeability [1,2,3,4]. Luminescent silicone materials show high potential in practical applications and are used in chemical sensors [11], photonics [12], optics [13], biomedicine [14] and optoelectronics [15]. The first one is to introduce luminophores into the polymer as fillers [21,24] This approach is the simplest; luminescent compounds can be extracted from the obtained materials upon contact with organic solvents. Molecules 2021, 26, 6866 the simplest; luminescent compounds can be extracted from the ob2taoifn1e1d materials upon contact with organic solvents. Dichlorodimethylsilane and dichloro(3-chloropropyl)methylsilane were used in a ratio of 3:1, respectively. Dichlorodimethylsilane and dichloro(3-chloropropyl)methylsilane were3uofs1e1d in a ratio of 3:1, respectively. OOnn tthhee ootthheerrhhaanndd,,ththeefafactcotor rofofrersetsrtircitcetdedinitnratrmaomleocluelcaurlamromtioontion fofrorRRee22-P-PDDMMSSdduueettoo ccrroossss--lliinnkkeeddssttrruuccttuurreeccaannpplalayyaarorloeleininthtehaepappepareaanracencoef doifffdeirfefenrceence ininpphhoottoolluummiinescceenncceeooffththeeobotbatianiendedReR-PeD-PMDSMsySstseymstse.mItsi.s aIltsoisimalpsooritmanptotortnanottettohantote thRaet1R-PeD1M-PSDaMnSd aRned2-PRDe2M-PSDarMe SstabrelesutanbdleerucnondteirnucounstiUnuVoiurrsaUdiVatiiornraadniadtiroentaiannldumreit-ain lunmesicneenscceeinnctenisnityennseiatyrlynueanrclhyanugnecdh,awnhgiecdh,mwahkiecshthmemakaetstrathcteimve faotrtrpaocteivnetiafloprrpacottiecanltial parapcptliiccaaltiaopnps.lications
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