Recent Advances on Furan-Based Visible Light Photoinitiators of Polymerization

Dumur, Frédéric

doi:10.3390/catal13030493

Cited by 11 publications

(4 citation statements)

References 263 publications

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“…It is worth remarking the very low amount of photoinitiator needed as compared to the conventional photoinitiator systems which are added in a typical dose of 1−5 wt %. 27 Control experiments demonstrated that both light and CPNs are necessary to achieve polymerization (Figure S3).…”

Section: Synthesis and Characterization Of Conjugated Polymer Nanopar...mentioning

confidence: 99%

Conjugated Polymer Nanoparticles as Visible Light Panchromatic Photoinitiators for 3D Printing of Acrylic Hydrogels

Cagnetta,

Gallastegui,

Martínez

et al. 2023

Macromolecules

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Conjugated polymers (CPs) are known to generate radical reactive oxygen species (ROS) such as hydrogen peroxide through photoinduced charge transfer processes involving water. In this work, this ability to generate radicals is utilized here to use conducting polymer nanoparticles (CPNs) as photoinitiator systems (PIS) for the polymerization of acrylic monomers in aqueous media. The CPNs do not require co-initiators and also act as cross-linkers. CPNs with different light-absorption properties effectively initiate photopolymerization across the entire visible light spectrum, reaching high monomer conversion yields (60− 99%) under blue, green, or red LED exposure. The resulting hydrogels demonstrate remarkable characteristics, including a significant water absorption swelling capacity (900−1600%) and substantial gel formation percentages (70−97%). Notably, the CPNs are evenly dispersed within the hydrogel matrix after photopolymerization, maintaining their photophysical properties and their ability to generate reactive species, potentially rendering the hydrogel suitable for bacterial photodynamic inactivation. Furthermore, PIS CPNs enable 3D printing with a fine resolution of up to 100 μm using a digital light processing technique.

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Section: Synthesis and Characterization Of Conjugated Polymer Nanopar...mentioning

confidence: 99%

Conjugated Polymer Nanoparticles as Visible Light Panchromatic Photoinitiators for 3D Printing of Acrylic Hydrogels

Cagnetta,

Gallastegui,

Martínez

et al. 2023

Macromolecules

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“…The lone pairs of electrons on the oxygen and sulfur atoms can engage in p−π conjugation with the double bond in the ring, leading to the formation of a delocalized π bond. This characteristic makes these heterocyclic compounds effective chromophores, enhancing the light absorption capability of molecules. − Karace et al synthesized a series of type II PIs of thiophene conjugated with thioxanthenone. The absorption of these molecules was red-shifted to 460 nm compared with thioxanthenone, and when complexed with tertiary amines, such molecules could efficiently initiate the polymerization of MMA.…”

Section: Introductionmentioning

confidence: 99%

Heteroatom/Heterocycle-Substituted Ketone Dyes as Efficient Photoinitiators in Visible Light-Emitting Diode/Near Infrared Light Photopolymerization with Enhanced Two-Photon Lithography Capability

Guo,

Zhou,

Fan

et al. 2024

ACS Appl. Polym. Mater.

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Photopolymerization is a burgeoning technology with a wide range of applications from coatings and inks to nanotechnology. The development of photosensitized systems that can work at long wavelengths with safety and environmental friendliness, such as visible light-emitting diodes and near infrared light, is essential. In this study, a series of ketone dyes containing heteroatom/heterocyclic substituents were designed on the basis of the carbazole−coumarin backbone to compare with aryl ring-substituted ones. The photophysical and photochemical properties of the dyes were studied by UV−vis spectroscopy, time-dependent density functional theory calculations, fluorescence spectroscopy, and steady-state photolysis. The potential application of dyes in one/two-photon polymerization was investigated. Results showed that the introduction of heterocycles/heteroatoms has a considerable influence on the absorption and polymerization properties of dyes. CCK−Th, which contains a thiophene substitute, exhibits the most excellent light absorption properties as well as the fastest reaction efficiency with amine additives. Notably, when comparing the two-photon lithography capability, the photoresist containing 0.1 wt % CCK− Th, which can achieve a writing speed of 46 mm s −1 , exhibits high two-photon sensitivity, about two times that of the benzene ringsubstituted CCK−Ben. In addition, CCK−Th shows outstanding ability to construct complex three-dimensional patterns. These modified CCKs show great application potential in nanotechnology, additive manufacturing, and optoelectronics and provide design concepts for the development of photoinitiators.

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“…Polymers 2023, 15, x FOR PEER REVIEW 2 of 4 [24,[59][60][61][62][63][64], dithienophosphole derivatives [65], thioxanthones [66][67][68][69][70][71][72][73][74][75][76][77][78][79][80], benzophenones [81][82][83][84], cyanines [85], bodipy [66,[86][87][88][89][90], NIR dyes [91], anthraquinones [92], curcumin [93][94][95][96], furan derivatives [97], pyrenes [98][99][100][101], iodonium salts [66,[102][103][104][...…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Monocomponent Visible Light Photoinitiating Systems Based on Sulfonium Salts

Dumur

2023

Polymers

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During the last decades, multicomponent photoinitiating systems have been the focus of intense research efforts, especially for the design of visible light photoinitiating systems. Although highly reactive three-component and even four-component photoinitiating systems have been designed, the complexity to elaborate such mixtures has incited researchers to design monocomponent Type II photoinitiators. Using this approach, the photosensitizer and the radical/cation generator can be combined within a unique molecule, greatly simplifying the elaboration of the photocurable resins. In this field, sulfonium salts are remarkable photoinitiators but these structures lack absorption in the visible range. Over the years, various structural modifications have been carried out in order to redshift their absorptions in the visible region. In this work, an overview of the different sulfonium salts activable under visible light and reported to date is proposed.

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Recent Advances on Furan-Based Visible Light Photoinitiators of Polymerization

Cited by 11 publications

References 263 publications

Conjugated Polymer Nanoparticles as Visible Light Panchromatic Photoinitiators for 3D Printing of Acrylic Hydrogels

Conjugated Polymer Nanoparticles as Visible Light Panchromatic Photoinitiators for 3D Printing of Acrylic Hydrogels

Heteroatom/Heterocycle-Substituted Ketone Dyes as Efficient Photoinitiators in Visible Light-Emitting Diode/Near Infrared Light Photopolymerization with Enhanced Two-Photon Lithography Capability

Recent Advances in Monocomponent Visible Light Photoinitiating Systems Based on Sulfonium Salts

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