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Papers by Monika Topa
International Journal of Molecular Sciences, Jun 23, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Polymer Chemistry
Herein, a review of the literature on polymerization shrinkage occurring in dental composites was... more Herein, a review of the literature on polymerization shrinkage occurring in dental composites was presented.
Polymer Chemistry
The suitability of new 9-[(E)-2-phenyl]anthracene derivatives with iodonium salt as high-performa... more The suitability of new 9-[(E)-2-phenyl]anthracene derivatives with iodonium salt as high-performance photoinitiating systems for obtaining novel multi-material photo-curable nanocomposites resins containing dedicated to 3D-VAT printing.
International Journal of Molecular Sciences
Three-dimensional printing in SLA (stereolithography) and DLP (digital light processing) technolo... more Three-dimensional printing in SLA (stereolithography) and DLP (digital light processing) technologies has recently been experiencing a period of extremely rapid development. This is due to the fact that researchers recognise the many advantages of 3D printing, such as the high resolution and speed of the modelling and printing processes. However, there is still a search for new resin formulations dedicated to specific 3D printers allowing for high-resolution prints. Therefore, in the following paper, the effects of dyes such as BODIPY, europium complex, and Coumarin 1 added to light-cured compositions polymerised according to the radical mechanism on the photopolymerisation process speed, polymerisation shrinkage, and the final properties of the printouts were investigated. The kinetics of the photopolymerisation of light-cured materials using real-time FT-IR methods, as well as printouts that tangibly demonstrate the potential application of 3D printing technology in Industry 4.0, ...
Sensors
Novel fluorescent sensors with electron-donating or electron-withdrawing substituents incorporate... more Novel fluorescent sensors with electron-donating or electron-withdrawing substituents incorporated into a chromophore group based on 2,6-diphenylpyridine were designed and synthesised. The spectroscopic properties of these compounds were studied. Moreover, the positive solvatochromism of 2,6-bis-(4-methylsulphanylphenyl)pyridine (PT-SCH3) in selected solvents was studied by measurement of the absorption and emission spectra and analysed using the Dimroth–Reichardt solvent parameter set. After that, the performance of a series of 2,6-diphenylpyridine derivatives as fluorescent molecular sensors for monitoring free-radical and cationic photopolymerization processes by the Fluorescence Probe Technique (FPT) was studied. As a consequence of this stage of research, the effect of substituents on the sensitivity of the 2,6-diphenylpyridine derivatives as sensors during photopolymerization has been evaluated and discussed. It has been found that compounds containing strong electron-donating...
Polymer Testing
Abstract A method for determination of relative initiation efficiency of free-radical photoinitia... more Abstract A method for determination of relative initiation efficiency of free-radical photoinitiators directly in monomers by Fluorescence Probe Technique (FPT) has been expanded into cationic photoinitiators and the use of LEDs instead of monochromatic light sources. The relative initiation efficiency of a series of cationic photoinitiators relative to diphenyliodonium hexafluorophosphate, and a series of free-radical photoinitiators relative to 2,2-dimethoxy-2-phenylacetophenone (Irgacure 651), in cationic and free-radical photopolymerization of 2-(2-vinyloxyethoxy)ethyl acrylate (VEEA) and 3,4-epoxycyclohexylmethyl methacrylate (Cyclomer M100) hybrid monomers has been determined. It was found that the initiation efficiency of cationic photoinitiators does not depend on the type of monomer, while the type of monomer affects initiation efficiency of free-radical photoinitiators.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Applicability of 15 trivalent samarium complexes as novel luminescent probes for monitoring progr... more Applicability of 15 trivalent samarium complexes as novel luminescent probes for monitoring progress of photopolymerization processes or thickness of polymer coatings by the Fluorescence Probe Technique (FPT) was studied. Three groups of samarium(III) complexes were evaluated in cationic photopolymerization of triethylene glycol divinyl ether monomer (TEGDVE) and free-radical photopolymerization of trimethylolpropane triacrylate (TMPTA). The complexes were the derivatives of tris(4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedionate)samarium(III), tris(4,4,4-trifluoro-1-phenyl-1,3-butanedionate)samarium(III) and tris(4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedionate)samarium(III), which were further coordinated with auxiliary ligands, such as 1,10-phenanthroline, triphenylphosphine oxide, tributylphosphine oxide and trioctylphosphine oxide. It has been found that most of the complexes studied are sensitive enough to be used as luminescent probes for monitoring progress of cationic photopolymerization of vinyl ether monomers over entire range of monomer conversions. In the case of free-radical polymerization processes, the samarium(III) complexes are not sensitive enough to changes of microviscosity and/or micropolarity of the medium, so they cannot be used to monitor progress of the polymerization. However, high stability of luminescence intensity of some of these complexes under free-radical polymerization conditions makes them good candidates for application as thickness sensors for polymer coatings prepared by free-radical photopolymerization. A quantitative relationship between a coating thickness and the luminescence intensity of the samarium(III) probes has been derived and verified experimentally within a broad range of the thicknesses.
European Polymer Journal
Abstract Applicability of a series of coumarin derivatives as fluorescent probes for monitoring p... more Abstract Applicability of a series of coumarin derivatives as fluorescent probes for monitoring progress of cationic photopolymerization processes by Fluorescence Probe Technique (FPT) has been studied using triethylene glycol divinyl ether as a model monomer and diphenyliodonium hexafluorophospate as a cationic photoinitiator. The following coumarins were evaluated: Coumarin 1, Coumarin 6H, Coumarin 102, Coumarin 120, Coumarin 151, Coumarin 343 and Coumarin 466. It has been found that despite the presence of an amino group in their structure, at low concentrations of the order of 0.1%, the Coumarins 1, 102, 343 and 466 can be used as the fluorescent probes for the cationic photopolymerization, while Coumarin 343 exhibits the best performance. At high concentrations, the aminocoumarins slow down the photopolymerization rate and extend induction period. All of the aminocoumarins are applicable as long-wavelength sensitizers for diphenyliodonium photoinitiators, enabling photopolymerization at the irradiation wavelengths, where the photoinitiator does not absorb. At short wavelengths, where both photoinitiator and probe absorb light, and at the probe concentrations below 0.1%, Coumarin 343 and Coumarin 1 accelerate the cationic photopolymerization by supplying an additional route for the photoinitiator cleavage beside its direct cleavage upon light absorption. The direct initiation and sensitization mechanisms are proposed.
Polymer Testing
Abstract Photopolymerization of the hybrid monomers: 3,4-epoxycyclohexylmethyl methacrylate (Cycl... more Abstract Photopolymerization of the hybrid monomers: 3,4-epoxycyclohexylmethyl methacrylate (Cyclomer M100) and 2-(2-vinyloxyethoxy)ethyl acrylate (VEEA) was studied by Fluorescence Probe Technique (FPT). Kinetics of cationic and free-radical photopolymerization of the hybrid monomers in the presence of the same molar concentration of various photoinitiators was compared, using UV LEDs as the curing light source. The performance of the following photoinitiators was tested in the cationic photopolymerization: Sylanto 7M-S, Sylanto 7M-P, Speedcure 938, Irgacure 250, HIP, Esacure 1187, and the following photoinitiators were used to induce free radical photopolymerization: Irgacure 184, Irgacure 127, Irgacure 651, Irgacure 907, Irgacure 819 and Speedcure TPO. It was found that, among the cationic photoinitiators, Sylanto 7M-S and Sylanto 7M-P are the most effective photoinitiators of the cationic polymerization for use with 320 nm and 365 nm UV LEDs, while Irgacure 819 and Speedcure TPO perform best in free radical photopolymerization of the hybrid monomers. Some structural factors and parameters affecting the photoinitiators performance are discussed.
Polymers
The applicability of new 1,6-diphenylquinolin-2-oneas derivatives as fluorescent molecular sensor... more The applicability of new 1,6-diphenylquinolin-2-oneas derivatives as fluorescent molecular sensors for monitoring the progress of photopolymerisation processes by Fluorescence Probe Technique (FPT) has been tested. The progress of cationic, free-radical and thiol-ene photopolymerisation for commercially available monomers: triethylene glycol divinyl ether (TEGDVE), trimethylolpropane triacrylate (TMPTA) and trimethylpropane tris(3-mercaptopropropionate) (MERCAPTO) was monitored. It was found that new derivatives of 1,6-diphenylquinolin-2-one shifted their fluorescence spectra towards shorter wavelengths with the progress of polymerisation, which enabled monitoring the progress in terms of fluorescence intensity ratios as the progress indicator. Derivatives of 1,6-diphenylquinolin-2-one show sensitivity to changes in both polarity and viscosity in the surrounding microenvironment during photopolymerisation processes. Therefore, it was shown that they are good candidates to act as flu...
Journal of Photopolymer Science and Technology
Photopolymerization is an environmentally-friendly, non-destructive, safe and solvent-free method... more Photopolymerization is an environmentally-friendly, non-destructive, safe and solvent-free method. Moreover it guarantees low energy consumption. Therefore the photopolymerization is used in many scientific disciplines, including dentistry for production photocurable dental materials. In this work, the new photoinitiating systems based on camphoroquinone (CQ) and iodonium salts with tosyl anion for initiation of photopolymerization of the acrylates monomers bisphenol A-glycidyl methacrylate (BisGMA) and triethyleneglycol dimethacrylate (TEGDMA) was studied. As a reference, camphorquinone (CQ) and ethyl 4-(dimethylamino)benzoate (EDB) photoinitiating system was used.
Polymer Chemistry
This paper describes the development of new coumarin chromophore-based iodonium salts as efficien... more This paper describes the development of new coumarin chromophore-based iodonium salts as efficient one-component cationic photoinitiators upon LEDs irradiation with maximum emission under the UV-A region at 365 nm and under visible light at 405 nm.
European Polymer Journal
Abstract Herein, novel 1H-quinolin-2-ones derivatives dedicated to polymer chemistry have been re... more Abstract Herein, novel 1H-quinolin-2-ones derivatives dedicated to polymer chemistry have been reported. Essential spectroscopic studies including absorbance, fluorescence emission and excitation spectra were carried out. Subsequently, a number of studies on the suitability of new compounds for the role of fluorescent molecular probes using Fluorescence Probe Technology were performed. The research present also the suitability of these compounds as co-initiators in a two-component system: 1H-quinolin-2-ones/4,4′-dimethyl-diphenyl iodonium hexafluorophosphate (OMNICAT 440). Cationic photopolymerisation processes of CADE epoxy and vinyl TEGDVE monomers, free-radical photopolymerisation of TMPTA acrylic monomer as well as thiol-ene photopolymerisation of a mixture of monomers: TATATO/MERCAPTO when exposed to UV light with maximum emission at 365 nm and visible light with maximum emission at 405 nm were carried out. Finally, the applicability of novel initiating systems to obtain fluorescent 3D prints was introduced.
Progress in Organic Coatings
Proceedings, Dec 11, 2017
Materials
The photoinduced polymerization of monomers is currently an essential tool in various industries.... more The photoinduced polymerization of monomers is currently an essential tool in various industries. The photopolymerization process plays an increasingly important role in biomedical applications. It is especially used in the production of dental composites. It also exhibits unique properties, such as a short time of polymerization of composites (up to a few seconds), low energy consumption, and spatial resolution (polymerization only in irradiated areas). This paper describes a short overview of the history and classification of different typical monomers and photoinitiating systems such as bimolecular photoinitiator system containing camphorquinone and aromatic amine, 1-phenyl-1,2-propanedione, phosphine derivatives, germanium derivatives, hexaarylbiimidazole derivatives, silane-based derivatives and thioxanthone derivatives used in the production of dental composites with their limitations and disadvantages. Moreover, this article represents the challenges faced when using the late...
RSC Advances
1-Amino-4-methyl-naphthalene-2-carbonitrile derivatives are proposed for the role of photosensiti... more 1-Amino-4-methyl-naphthalene-2-carbonitrile derivatives are proposed for the role of photosensitizers of iodonium salt during the photopolymerization processes upon near UV-A and visible ranges.
RSC Advances
1-Amino-4-methyl-naphthalene-2-carbonitrile derivatives are proposed for the role of photosensiti... more 1-Amino-4-methyl-naphthalene-2-carbonitrile derivatives are proposed for the role of photosensitizers of iodonium salt during the photopolymerization processes upon near UV-A and visible ranges.
International Journal of Molecular Sciences, Jun 23, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Polymer Chemistry
Herein, a review of the literature on polymerization shrinkage occurring in dental composites was... more Herein, a review of the literature on polymerization shrinkage occurring in dental composites was presented.
Polymer Chemistry
The suitability of new 9-[(E)-2-phenyl]anthracene derivatives with iodonium salt as high-performa... more The suitability of new 9-[(E)-2-phenyl]anthracene derivatives with iodonium salt as high-performance photoinitiating systems for obtaining novel multi-material photo-curable nanocomposites resins containing dedicated to 3D-VAT printing.
International Journal of Molecular Sciences
Three-dimensional printing in SLA (stereolithography) and DLP (digital light processing) technolo... more Three-dimensional printing in SLA (stereolithography) and DLP (digital light processing) technologies has recently been experiencing a period of extremely rapid development. This is due to the fact that researchers recognise the many advantages of 3D printing, such as the high resolution and speed of the modelling and printing processes. However, there is still a search for new resin formulations dedicated to specific 3D printers allowing for high-resolution prints. Therefore, in the following paper, the effects of dyes such as BODIPY, europium complex, and Coumarin 1 added to light-cured compositions polymerised according to the radical mechanism on the photopolymerisation process speed, polymerisation shrinkage, and the final properties of the printouts were investigated. The kinetics of the photopolymerisation of light-cured materials using real-time FT-IR methods, as well as printouts that tangibly demonstrate the potential application of 3D printing technology in Industry 4.0, ...
Sensors
Novel fluorescent sensors with electron-donating or electron-withdrawing substituents incorporate... more Novel fluorescent sensors with electron-donating or electron-withdrawing substituents incorporated into a chromophore group based on 2,6-diphenylpyridine were designed and synthesised. The spectroscopic properties of these compounds were studied. Moreover, the positive solvatochromism of 2,6-bis-(4-methylsulphanylphenyl)pyridine (PT-SCH3) in selected solvents was studied by measurement of the absorption and emission spectra and analysed using the Dimroth–Reichardt solvent parameter set. After that, the performance of a series of 2,6-diphenylpyridine derivatives as fluorescent molecular sensors for monitoring free-radical and cationic photopolymerization processes by the Fluorescence Probe Technique (FPT) was studied. As a consequence of this stage of research, the effect of substituents on the sensitivity of the 2,6-diphenylpyridine derivatives as sensors during photopolymerization has been evaluated and discussed. It has been found that compounds containing strong electron-donating...
Polymer Testing
Abstract A method for determination of relative initiation efficiency of free-radical photoinitia... more Abstract A method for determination of relative initiation efficiency of free-radical photoinitiators directly in monomers by Fluorescence Probe Technique (FPT) has been expanded into cationic photoinitiators and the use of LEDs instead of monochromatic light sources. The relative initiation efficiency of a series of cationic photoinitiators relative to diphenyliodonium hexafluorophosphate, and a series of free-radical photoinitiators relative to 2,2-dimethoxy-2-phenylacetophenone (Irgacure 651), in cationic and free-radical photopolymerization of 2-(2-vinyloxyethoxy)ethyl acrylate (VEEA) and 3,4-epoxycyclohexylmethyl methacrylate (Cyclomer M100) hybrid monomers has been determined. It was found that the initiation efficiency of cationic photoinitiators does not depend on the type of monomer, while the type of monomer affects initiation efficiency of free-radical photoinitiators.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Applicability of 15 trivalent samarium complexes as novel luminescent probes for monitoring progr... more Applicability of 15 trivalent samarium complexes as novel luminescent probes for monitoring progress of photopolymerization processes or thickness of polymer coatings by the Fluorescence Probe Technique (FPT) was studied. Three groups of samarium(III) complexes were evaluated in cationic photopolymerization of triethylene glycol divinyl ether monomer (TEGDVE) and free-radical photopolymerization of trimethylolpropane triacrylate (TMPTA). The complexes were the derivatives of tris(4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedionate)samarium(III), tris(4,4,4-trifluoro-1-phenyl-1,3-butanedionate)samarium(III) and tris(4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedionate)samarium(III), which were further coordinated with auxiliary ligands, such as 1,10-phenanthroline, triphenylphosphine oxide, tributylphosphine oxide and trioctylphosphine oxide. It has been found that most of the complexes studied are sensitive enough to be used as luminescent probes for monitoring progress of cationic photopolymerization of vinyl ether monomers over entire range of monomer conversions. In the case of free-radical polymerization processes, the samarium(III) complexes are not sensitive enough to changes of microviscosity and/or micropolarity of the medium, so they cannot be used to monitor progress of the polymerization. However, high stability of luminescence intensity of some of these complexes under free-radical polymerization conditions makes them good candidates for application as thickness sensors for polymer coatings prepared by free-radical photopolymerization. A quantitative relationship between a coating thickness and the luminescence intensity of the samarium(III) probes has been derived and verified experimentally within a broad range of the thicknesses.
European Polymer Journal
Abstract Applicability of a series of coumarin derivatives as fluorescent probes for monitoring p... more Abstract Applicability of a series of coumarin derivatives as fluorescent probes for monitoring progress of cationic photopolymerization processes by Fluorescence Probe Technique (FPT) has been studied using triethylene glycol divinyl ether as a model monomer and diphenyliodonium hexafluorophospate as a cationic photoinitiator. The following coumarins were evaluated: Coumarin 1, Coumarin 6H, Coumarin 102, Coumarin 120, Coumarin 151, Coumarin 343 and Coumarin 466. It has been found that despite the presence of an amino group in their structure, at low concentrations of the order of 0.1%, the Coumarins 1, 102, 343 and 466 can be used as the fluorescent probes for the cationic photopolymerization, while Coumarin 343 exhibits the best performance. At high concentrations, the aminocoumarins slow down the photopolymerization rate and extend induction period. All of the aminocoumarins are applicable as long-wavelength sensitizers for diphenyliodonium photoinitiators, enabling photopolymerization at the irradiation wavelengths, where the photoinitiator does not absorb. At short wavelengths, where both photoinitiator and probe absorb light, and at the probe concentrations below 0.1%, Coumarin 343 and Coumarin 1 accelerate the cationic photopolymerization by supplying an additional route for the photoinitiator cleavage beside its direct cleavage upon light absorption. The direct initiation and sensitization mechanisms are proposed.
Polymer Testing
Abstract Photopolymerization of the hybrid monomers: 3,4-epoxycyclohexylmethyl methacrylate (Cycl... more Abstract Photopolymerization of the hybrid monomers: 3,4-epoxycyclohexylmethyl methacrylate (Cyclomer M100) and 2-(2-vinyloxyethoxy)ethyl acrylate (VEEA) was studied by Fluorescence Probe Technique (FPT). Kinetics of cationic and free-radical photopolymerization of the hybrid monomers in the presence of the same molar concentration of various photoinitiators was compared, using UV LEDs as the curing light source. The performance of the following photoinitiators was tested in the cationic photopolymerization: Sylanto 7M-S, Sylanto 7M-P, Speedcure 938, Irgacure 250, HIP, Esacure 1187, and the following photoinitiators were used to induce free radical photopolymerization: Irgacure 184, Irgacure 127, Irgacure 651, Irgacure 907, Irgacure 819 and Speedcure TPO. It was found that, among the cationic photoinitiators, Sylanto 7M-S and Sylanto 7M-P are the most effective photoinitiators of the cationic polymerization for use with 320 nm and 365 nm UV LEDs, while Irgacure 819 and Speedcure TPO perform best in free radical photopolymerization of the hybrid monomers. Some structural factors and parameters affecting the photoinitiators performance are discussed.
Polymers
The applicability of new 1,6-diphenylquinolin-2-oneas derivatives as fluorescent molecular sensor... more The applicability of new 1,6-diphenylquinolin-2-oneas derivatives as fluorescent molecular sensors for monitoring the progress of photopolymerisation processes by Fluorescence Probe Technique (FPT) has been tested. The progress of cationic, free-radical and thiol-ene photopolymerisation for commercially available monomers: triethylene glycol divinyl ether (TEGDVE), trimethylolpropane triacrylate (TMPTA) and trimethylpropane tris(3-mercaptopropropionate) (MERCAPTO) was monitored. It was found that new derivatives of 1,6-diphenylquinolin-2-one shifted their fluorescence spectra towards shorter wavelengths with the progress of polymerisation, which enabled monitoring the progress in terms of fluorescence intensity ratios as the progress indicator. Derivatives of 1,6-diphenylquinolin-2-one show sensitivity to changes in both polarity and viscosity in the surrounding microenvironment during photopolymerisation processes. Therefore, it was shown that they are good candidates to act as flu...
Journal of Photopolymer Science and Technology
Photopolymerization is an environmentally-friendly, non-destructive, safe and solvent-free method... more Photopolymerization is an environmentally-friendly, non-destructive, safe and solvent-free method. Moreover it guarantees low energy consumption. Therefore the photopolymerization is used in many scientific disciplines, including dentistry for production photocurable dental materials. In this work, the new photoinitiating systems based on camphoroquinone (CQ) and iodonium salts with tosyl anion for initiation of photopolymerization of the acrylates monomers bisphenol A-glycidyl methacrylate (BisGMA) and triethyleneglycol dimethacrylate (TEGDMA) was studied. As a reference, camphorquinone (CQ) and ethyl 4-(dimethylamino)benzoate (EDB) photoinitiating system was used.
Polymer Chemistry
This paper describes the development of new coumarin chromophore-based iodonium salts as efficien... more This paper describes the development of new coumarin chromophore-based iodonium salts as efficient one-component cationic photoinitiators upon LEDs irradiation with maximum emission under the UV-A region at 365 nm and under visible light at 405 nm.
European Polymer Journal
Abstract Herein, novel 1H-quinolin-2-ones derivatives dedicated to polymer chemistry have been re... more Abstract Herein, novel 1H-quinolin-2-ones derivatives dedicated to polymer chemistry have been reported. Essential spectroscopic studies including absorbance, fluorescence emission and excitation spectra were carried out. Subsequently, a number of studies on the suitability of new compounds for the role of fluorescent molecular probes using Fluorescence Probe Technology were performed. The research present also the suitability of these compounds as co-initiators in a two-component system: 1H-quinolin-2-ones/4,4′-dimethyl-diphenyl iodonium hexafluorophosphate (OMNICAT 440). Cationic photopolymerisation processes of CADE epoxy and vinyl TEGDVE monomers, free-radical photopolymerisation of TMPTA acrylic monomer as well as thiol-ene photopolymerisation of a mixture of monomers: TATATO/MERCAPTO when exposed to UV light with maximum emission at 365 nm and visible light with maximum emission at 405 nm were carried out. Finally, the applicability of novel initiating systems to obtain fluorescent 3D prints was introduced.
Progress in Organic Coatings
Proceedings, Dec 11, 2017
Materials
The photoinduced polymerization of monomers is currently an essential tool in various industries.... more The photoinduced polymerization of monomers is currently an essential tool in various industries. The photopolymerization process plays an increasingly important role in biomedical applications. It is especially used in the production of dental composites. It also exhibits unique properties, such as a short time of polymerization of composites (up to a few seconds), low energy consumption, and spatial resolution (polymerization only in irradiated areas). This paper describes a short overview of the history and classification of different typical monomers and photoinitiating systems such as bimolecular photoinitiator system containing camphorquinone and aromatic amine, 1-phenyl-1,2-propanedione, phosphine derivatives, germanium derivatives, hexaarylbiimidazole derivatives, silane-based derivatives and thioxanthone derivatives used in the production of dental composites with their limitations and disadvantages. Moreover, this article represents the challenges faced when using the late...
RSC Advances
1-Amino-4-methyl-naphthalene-2-carbonitrile derivatives are proposed for the role of photosensiti... more 1-Amino-4-methyl-naphthalene-2-carbonitrile derivatives are proposed for the role of photosensitizers of iodonium salt during the photopolymerization processes upon near UV-A and visible ranges.
RSC Advances
1-Amino-4-methyl-naphthalene-2-carbonitrile derivatives are proposed for the role of photosensiti... more 1-Amino-4-methyl-naphthalene-2-carbonitrile derivatives are proposed for the role of photosensitizers of iodonium salt during the photopolymerization processes upon near UV-A and visible ranges.