Highly Active Visible-Light Photocatalysts for Curing a Ceramic Precursor<sup>1</sup>

Guo, Andrew; Fry, Bryan E.; Neckers, Douglas C.

doi:10.1021/cm970518a

Cited by 21 publications

(22 citation statements)

References 35 publications

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“…The platinum catalysts contained ligands such as benzylacetonate, trifluoroacetylacetonate, and benzoyltrifluoroacetonate and could be photoactivated by visible light [97].…”

Section: Light-initiated Hydrosilylation Reactionsmentioning

confidence: 99%

“…Neckers and coworkers demonstrated the use of various bis(β-diketonato)Pt II complexes for the hydrosilylation cross-linking reaction of oligo [methyl-silylene)-methylene] with tetravinylsilane. The platinum catalysts contained ligands such as benzylacetonate, trifluoroacetylacetonate, and benzoyltrifluoroacetonate and could be photoactivated by visible light [ 97 ].…”

Section: Non-thermal Stimuli For Hydrosilylation Reactionsmentioning

confidence: 99%

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Fifty Years of Hydrosilylation in Polymer Science: A Review of Current Trends of Low-Cost Transition-Metal and Metal-Free Catalysts, Non-Thermally Triggered Hydrosilylation Reactions, and Industrial Applications

2017

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Hydrosilylation reactions, the (commonly) anti-Markovnikov additions of silanes to unsaturated bonds present in compounds such as alkenes and alkynes, offer numerous unique and advantageous properties for the preparation of polymeric materials, such as high yields and stereoselectivity. These reactions require to be catalyzed, for which platinum compounds were used in the initial stages. Celebrating the 50th anniversary of hydrosilylations in polymer science and, concomitantly, five decades of continuously growing research, hydrosilylation reactions have advanced to a level that renders them predestined for transfer into commercial products on the large scale. Facing this potential transfer, this review addresses and discusses selected current trends of the scientific research in the area, namely low-cost transition metal catalysts (focusing on iron, cobalt, and nickel complexes), metal-free catalysts, non-thermally triggered hydrosilylation reactions (highlighting stimuli such as (UV-)light), and (potential) industrial applications (highlighting the catalysts used and products manufactured). This review focuses on the hydrosilylation reactions involving alkene reactants.

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“…The platinum catalysts contained ligands such as benzylacetonate, trifluoroacetylacetonate, and benzoyltrifluoroacetonate and could be photoactivated by visible light [97].…”

Section: Light-initiated Hydrosilylation Reactionsmentioning

confidence: 99%

Section: Non-thermal Stimuli For Hydrosilylation Reactionsmentioning

confidence: 99%

Fifty Years of Hydrosilylation in Polymer Science: A Review of Current Trends of Low-Cost Transition-Metal and Metal-Free Catalysts, Non-Thermally Triggered Hydrosilylation Reactions, and Industrial Applications

2017

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“…The curing of the material is able to proceed without any further irradiation. It was supposed that the UV‐irradiation induces the formation of a highly active homogeneous catalyst and the heat generated by the polymerization reaction induces the conversion into a colloidal platinum heterogeneous catalyst, which is able to catalyze the reaction in the dark.…”

Section: Resultsmentioning

confidence: 99%

UV‐cured silicone composites obtained via hydrosilation and in‐situ generation of inorganic particles

Marchi

Sangermano

Meier

et al. 2015

Polymer Engineering & Sci

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The in situ generation of particles is an efficient way to prepare organic‐inorganic hybrid materials. This approach has been widely used to enhance the dispersion within the matrix and therefore to improve the composites’ properties. This method was used in the present paper to produce silicone composites. The crosslinking of the polymer matrix was achieved by hydrosilation reaction that is typically the addition of a Si‐H bond across a double bond, in the presence of a platinum catalyst. The generation of silica particles was carried out prior the hydrosilation reaction. We previously demonstrated that this usually thermally activated reaction can also be induced under UV‐light and that a front propagation allows the formation of thick unfilled samples. However, the presence of inorganic particles directly dispersed in the matrix lead to a reduction of thickness curability. That is the reason why the addition of particles by sol‐gel process is studied in the present article. The lower dimension and better dispersion of the particles within the material promote the formation of thicker cured composites. The effect of the silica precursor's amount on the system's reactivity was evaluated and samples thick up to 2 cm were obtained with the most suitable conditions of reaction. POLYM. ENG. SCI., 56:3–8, 2016. © 2015 Society of Plastics Engineers

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“…These compounds have been used as photoactivated hydrosilylation catalysts for solution reactions, polymerization of vinyldimethylsilane in solution, and for curing and patterning preceramic polymer films. [50][51][52][53][54][55] Photoactivated catalysis initiates hydrosilylation chemistry that crosslinks the film only in those regions exposed to the UV light.…”

Section: Photopatterning Sorptive Polymeric Layersmentioning

confidence: 99%

Sorptive Polymers and Photopatterned Films for Gas Phase Chemical Microsensors and Arrays

Grate¹,

Nelson²

2002

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The selective layer on a gas phase chemical microsensor plays a critical role in the sensitivity and selectivity of the sensor's response. Polymers can rapidly and reversibly absorb vapor molecules. As sorptive layers on chemical sensors, polymers are useful for a variety of chemical microsensor types and transduction mechanisms, either as is or as composites with conductive particles or dyes. The performance requirements for polymers are described in terms of their chemical and physical properties. A versatile synthetic approach for preparing sensing polymers has been developed using hydrosilylation chemistry to prepare carbosiloxane polymers. Polymers with diverse chemical selectivities have been prepared by this method. Furthermore, sorptive polymer materials can be photopatterned into defined areas on surfaces using a photoactivated catalyst and hydrosilylation chemistry. Polymer films with diverse chemical selectivities have been patterned with this new method.

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Highly Active Visible-Light Photocatalysts for Curing a Ceramic Precursor¹

Cited by 21 publications

References 35 publications

Fifty Years of Hydrosilylation in Polymer Science: A Review of Current Trends of Low-Cost Transition-Metal and Metal-Free Catalysts, Non-Thermally Triggered Hydrosilylation Reactions, and Industrial Applications

Fifty Years of Hydrosilylation in Polymer Science: A Review of Current Trends of Low-Cost Transition-Metal and Metal-Free Catalysts, Non-Thermally Triggered Hydrosilylation Reactions, and Industrial Applications

UV‐cured silicone composites obtained via hydrosilation and in‐situ generation of inorganic particles

Sorptive Polymers and Photopatterned Films for Gas Phase Chemical Microsensors and Arrays

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Highly Active Visible-Light Photocatalysts for Curing a Ceramic Precursor1

Cited by 21 publications

References 35 publications

Fifty Years of Hydrosilylation in Polymer Science: A Review of Current Trends of Low-Cost Transition-Metal and Metal-Free Catalysts, Non-Thermally Triggered Hydrosilylation Reactions, and Industrial Applications

Fifty Years of Hydrosilylation in Polymer Science: A Review of Current Trends of Low-Cost Transition-Metal and Metal-Free Catalysts, Non-Thermally Triggered Hydrosilylation Reactions, and Industrial Applications

UV‐cured silicone composites obtained via hydrosilation and in‐situ generation of inorganic particles

Sorptive Polymers and Photopatterned Films for Gas Phase Chemical Microsensors and Arrays

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Product

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Highly Active Visible-Light Photocatalysts for Curing a Ceramic Precursor¹