Multifunctional biphenyl derivatives as photosensitisers in various types of photopolymerization processes, including IPN formation, 3D printing of photocurable multiwalled carbon nanotubes (MWCNTs) fluorescent composites

Tomal, Wiktoria; Chachaj‐Brekiesz, Anna; Popielarz, Roman; Ortyl, Joanna

doi:10.1039/d0ra04146g

Cited by 25 publications

(23 citation statements)

References 65 publications

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“…Reactivity of the phenyl radicals can be further improved by reaction with NVK, promoting the formation of the highly reactive Ph-NVK • radicals. [46][47][48][49][50] These radicals Ph-NVK • can also react with the oxidized photosensitizer so that the cations Ph-NVK + can be generated, these cations being capable to initiate a free radical-promoted cationic polymerization (FRPCP) of epoxides.…”

Section: Type I Photoinitiators Type Ii Photoinitiatorsmentioning

confidence: 99%

Recent advances on ferrocene-based photoinitiating systems

Dumur

2021

European Polymer Journal

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Photoinitiators of polymerization with reversible electrochemical properties are actively researched as these molecules can advantageously be used in photocatalytic systems, enabling to reduce the photoinitiators content within the photocurable resins. In this field, ferrocene which is extensively used by electrochemists as a reference compound for cyclic voltammetry also exhibits a significant absorption in the visible range as well as a low oxidation potential so that this metallocene was used as a potential candidate for the design of photoinitiators of polymerization. Over the years, ferrocene has been examined in numerous polymerization processes going from anionic to cationic polymerizations, but also for the freeradical polymerization of acrylates or as a sacrificial electron donor in free radical polymerization processes. Parallel to this, the development of cheap, compact and energysaving irradiation setups based on light-emitting diodes (LEDs) have clearly favored the development of visible light photoinitiators and this technology has nowadays the potential to replace the well-established UV photopolymerization. In this review, an overview of the recent development of the ferrocene-based photoinitiating systems is provided. To evidence the interest of the ferrocene derivatives recently developed, comparisons with benchmark photoinitiators will be provided.

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Section: Type I Photoinitiators Type Ii Photoinitiatorsmentioning

confidence: 99%

Recent advances on ferrocene-based photoinitiating systems

Dumur

2021

European Polymer Journal

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“…These radicals can also react with the iodonium salt (Ph2I + ), generating Ph-NVK + cations, capable to initiate a cationic polymerization. [16,[160][161][162] Considering that radicals and cations can be simultaneously generated within the photocurable resins, interpenetrated polymer networks (IPN) can be thus prepared with these dual curing systems. [88,163,164] Parallel to this, with regards to the environmental and safety concerns, the development of biosourced and/or bioinspired photoinitiators has become an active research field.…”

Section: Figure 1 the Characteristic Features Of Photopolymerizationmentioning

confidence: 99%

Recent advances on chalcone-based photoinitiators of polymerization

Ibrahim‐Ouali

Dumur

2021

European Polymer Journal

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Photopolymerization is an active research field facing a revolution due to the recent availability of cheap, lightweight, compact and energy-saving light sources that constitutes light-emitting diodes (LEDs). With regards to the low light intensity delivered by these new irradiation setups, the demand for photoinitiating systems activable under low light intensity, in the visible range, and exhibiting a high reactivity even under air are actively researched.With aim at developing dyes fitting the above requirements while remaining relatively uncoloured, chalcones are one of those. In this review, an overview of the recent development concerning chalcone-based photoinitiating systems is reported. With aim at evidencing the crucial interest of this family of dyes, comparisons with benchmark photoinitiators will be presented.

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“…Scientists around the world are currently working on new molecules, the so-called iodine salt photosensitizers, to efficiently transfer electrons to the iodine salt and thus effectively trigger light-initiated polymerization. 19 Many types of compounds are available as effective photosensitizers of iodine salts, including biphenyl, 20,21 terphenyl, 1,22,28 thioxanthone, 23 pyridine [24][25][26] or 1,8-naphthalimide 27 derivatives. However, it is a constant challenge to develop more "greener" sensitizers derived from natural resources that are non-toxic and highly effective and can be successfully exploited in biomedical applications.…”

Section: Introductionmentioning

confidence: 99%