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 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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Hybrid polymer composite materials. Part 2. Preparation technology

All the materials Encyclopedic Reference Book ◽

10.31044/1994-6260-2020-0-1-8-13 ◽

2020 ◽

pp. 8-13

Keyword(s):

Composite Materials ◽

Impact Toughness ◽

Polymer Composites ◽

The Other ◽

Polymer Materials ◽

Hybrid Polymer ◽

Preparation Technology ◽

Advantages And Disadvantages ◽

Hybrid Polymer Composite ◽

The One

The main methods (pressing and winding) of the processing of hybrid polymer composites to obtain items were examined. Advantages and disadvantages of the methods were noted. Good combinations of different-module fibers (carbon, glass, boron, organic) in hybrid polymer materials are described, which allow one to prepare materials with high compression strength on the one hand, and to increase fracture energy of samples and impact toughness on the other hand.

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Isoconversional kinetic analysis for determining the rate of cross-linking for Pt and peroxide cure silicone rubbers

Thermochimica Acta ◽

10.1016/j.tca.2021.178982 ◽

2021 ◽

pp. 178982

Author(s):

Tero Jalkanen

Keyword(s):

Kinetic Analysis ◽

Cross Linking ◽

Isoconversional Kinetic Analysis ◽

Silicone Rubbers

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Microwave-Assisted Synthesis of Hybrid Polymer Materials and Composites

Microwave-assisted Polymer Synthesis - Advances in Polymer Science ◽

10.1007/12_2014_296 ◽

2014 ◽

pp. 241-294 ◽

Cited By ~ 2

Author(s):

Dariusz Bogdal ◽

Szczepan Bednarz ◽

Katarzyna Matras-Postolek

Keyword(s):

Polymer Materials ◽

Microwave Assisted Synthesis ◽

Hybrid Polymer ◽

Microwave Assisted

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Synthesis and Properties of 6-Aryl-4-azidocinnolines and 6-Aryl-4-(1,2,3-1H-triazol-1-yl)cinnolines

Molecules ◽

10.3390/molecules24132386 ◽

2019 ◽

Vol 24 (13) ◽

pp. 2386 ◽

Cited By ~ 3

Author(s):

Natalia A. Danilkina ◽

Nina S. Bukhtiiarova ◽

Anastasia I. Govdi ◽

Anna A. Vasileva ◽

Andrey M. Rumyantsev ◽

...

Keyword(s):

Photoinduced Electron Transfer ◽

Functional Group ◽

Click Reaction ◽

Bromine Atom ◽

Photophysical Properties ◽

Triazole Ring ◽

Synthetic Approach ◽

Terminal Alkynes ◽

Reaction Products ◽

Fluorescent Properties

An efficient approach towards the synthesis of 6-aryl-4-azidocinnolines was developed with the aim of exploring the photophysical properties of 6-aryl-4-azidocinnolines and their click reaction products with alkynes, 6-aryl-4-(1,2,3-1H-triazol-1-yl)cinnolines. The synthetic route is based on the Richter-type cyclization of 2-ethynyl-4-aryltriazenes with the formation of 4-bromo-6-arylcinnolines and nucleophilic substitution of a bromine atom with an azide functional group. The developed synthetic approach is tolerant to variations of functional groups on the aryl moiety. The resulting azidocinnolines were found to be reactive in both CuAAC with terminal alkynes and SPAAC with diazacyclononyne, yielding 4-triazolylcinnolines. It was found that 4-azido-6-arylcinnolines possess weak fluorescent properties, while conversion of the azido function into a triazole ring led to complete fluorescence quenching. The lack of fluorescence in triazoles could be explained by the non-planar structure of triazolylcinnolines and a possible photoinduced electron transfer (PET) mechanism. Among the series of 4-triazolylcinnoline derivatives a compound bearing hydroxyalkyl substituent at triazole ring was found to be cytotoxic to HeLa cells.

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Improvement of PA6 Mechanical Properties by Radiation Cross-Linking

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1120-1121.1163 ◽

2015 ◽

Vol 1120-1121 ◽

pp. 1163-1166 ◽

Cited By ~ 2

Author(s):

Petr Kratky ◽

David Manas ◽

Miroslav Manas ◽

Michal Stanek ◽

Martin Ovsik ◽

...

Keyword(s):

Mechanical Properties ◽

Surface Layer ◽

Polymer Material ◽

Polyamide 6 ◽

Polymer Materials ◽

Cross Linking ◽

Depth Sensing ◽

Surface Layers ◽

Hard Surface ◽

End Use

Influence of mechanical properties of the hard surface layer of modified polyamide 6 is studied. Mechanical properties are acquired by nanohardness test with using the DSI method (Depth Sensing Indentation). Hard surface layers are created by radiation cross-linking technology. This technology allows polymer materials modification followed by the change of their end-use properties. The surface layer of polymer material is modified by ionizing β - radiation. When the polymer material is exposed to the β radiation, it is possible to observe changes of the surface layer at applied load. Radiation cross-linking usually improves strength, reduces creep, contributes to chemical resistance improvement, and in many cases improves tribological properties.

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Improvement of the transparency, mechanical, and shape memory properties of polymethylmethacrylate/titania hybrid films using tetrabutylphosphonium chloride

Polymer Chemistry ◽

10.1039/c9py00783k ◽

2019 ◽

Vol 10 (35) ◽

pp. 4779-4788 ◽

Cited By ~ 1

Author(s):

Shuta Hara ◽

Momohiro Ishizu ◽

Shota Watanabe ◽

Takehiro Kaneko ◽

Takeshi Toyama ◽

...

Keyword(s):

Shape Memory ◽

Crosslink Density ◽

Polymer Materials ◽

Hybrid Polymer ◽

Hybrid Films ◽

Adjustment Strategy ◽

Shape Memory Properties

The crosslink density adjustment strategy based on tetrabutylphosphonium chloride allows for the design of multifunctional hybrid polymer materials that are optically clear and combine excellent mechanical and shape memory properties.

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