Article
Chemistry, Physical
Mahmoud Rahal, Bernadette Graff, Joumana Toufaily, Tayssir Hamieh, Malika Ibrahim-Ouali, Frederic Dumur, Jacques Lalevee
Summary: In this article, five new organic dyes based on the naphthalimide scaffold were synthesized and tested as high-performance photoinitiators. These dyes exhibited good photopolymerization profiles, enabling the generation of interpenetrating polymer networks to improve mechanical properties of materials.
Article
Materials Science, Multidisciplinary
Emilia Hola, Pawel Fiedor, Andrzej Dzienia, Joanna Ortyl
Summary: The study focused on the synthesis and application of thioxanthone derivatives as photosensitizers for photopolymerization processes, as well as their potential use as metal-free photoredox catalysts in organocatalyzed atom transfer radical polymerization (ATRP). Additionally, the properties of these compounds were investigated, including absorption, fluorescence, and electrochemical properties, along with their performance in 3D printing applications.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Polymer Science
Yu-Hao Wu, Adel Noon, Fatima Hammoud, Tayssir Hamieh, Joumana Toufaily, Bernadette Graff, Jacques Lalevee, Yung-Chung Chen
Summary: We have synthesized a series of oxime esters with different electron-donating groups connected to the triphenylamine. The compounds were successfully prepared and their absorption region, theoretical calculations, and photochemical properties were studied. Among them, TPA-CZ and TPA-PT based formulations showed better photochemical and photoreactive properties. Additionally, the oxime ester/iodonium salt two-component photoinitiating systems exhibited efficient photopolymerization behavior under 405 nm LED irradiation.
Article
Chemistry, Applied
Baoling Tang, Xiaowei Ge, Qinwen Wang
Summary: Thioxanthone derivatives are synthesized as one-component photoinitiators via a simple condensation reaction. TX-N-I and TX-I exhibit a similar absorption characteristic to thioxanthone, with a red-shifted maximum absorption wavelength. TX-N-I acts as an efficient initiator in the photopolymerization reaction.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2022)
Article
Polymer Science
Mahmoud Rahal, Guillaume Noirbent, Bernadette Graff, Joumana Toufaily, Tayssir Hamieh, Didier Gigmes, Frederic Dumur, Jacques Lalevee
Summary: This study focuses on the investigation of two new copper complexes as visible light photoinitiators for free radical photopolymerization of acrylates, showing promising results in combination with iodonium salts and/or amines in multi-component photoinitiating systems.
Article
Chemistry, Applied
Weijie Wang, Ming Jin, Haiyan Pan, Decheng Wan
Summary: These four new photoinitiators demonstrate excellent absorption and high radical generation efficiency under LED irradiation, efficiently initiating polymerization reactions with higher efficiency and potential in photocuring applications.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Polymer Science
Marika Morone, Stephen Postle, Vincenzo Razzano, Charles Deguines, X. Allonas
Summary: A new class of photoinitiators based on 3-ketoquinolone chromophoric group for free radical photopolymerization is presented in this study. The spectroscopic properties, quantum yield in triplet state, and efficiency in formation of initiating radicals were measured. The results of photopolymerization experiments showed that the 3-ketoquinolones are effective photoinitiators for LED curing. Additional properties such as yellowing of cured films were also examined. These compounds appear to be interesting alternatives to conventional type II photoinitiators.
Review
Chemistry, Physical
Frederic Dumur
Summary: Photopolymerization is an active research field focused on polymerizing in greener conditions using visible light instead of traditional UV light. Furane is an interesting candidate for designing photocatalysts of polymerization due to its low cost and easy chemical modification. This review provides an overview of furane-based photoinitiator design and compares them to reference systems to demonstrate their potential in innovative structures.
Article
Chemistry, Multidisciplinary
Hong Chen, Guillaume Noirbent, Shaohui Liu, Damien Brunel, Bernadette Graff, Didier Gigmes, Yijun Zhang, Ke Sun, Fabrice Morlet-Savary, Pu Xiao, Frederic Dumur, Jacques Lalevee
Summary: Four series of bis-chalcone compounds based on benzylpiperidinone, tetrahydrothiopyranone, pyridine or biphenyl central parts were designed and synthesized, showing potential as new near-UV/visible light sensitive photoinitiators for free radical photopolymerization and cationic photopolymerization. Among them, pyridine-based bis-chalcones proved to be the most efficient photoinitiators under 375 nm LED irradiation.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Polymer Science
Shih-Chieh Yen, Jen-Shyang Ni, Yung-Chung Chen
Summary: Four new one-component Type II visible-light-absorbing chalcones (CY6-CY9) with triphenylamine substitute and dimethylaniline have been prepared for free radical photopolymerization. The position and methoxy-substituted of triphenylamines have significant influence on their properties. The designed chemical structure can fine-tune the photopolymerization character in one-component Type II triphenylamine-functionalized chalcones.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Polymer Science
Xinyue Guo, Huanv Mao, Chunyan Bao, Decheng Wan, Ming Jin
Summary: In this study, three dyes based on fused carbazole-coumarin-ketone structures were designed and synthesized. Their excellent absorption properties matching visible light-emitting diodes (LEDs) wavelength band were demonstrated. These dyes can serve as efficient photoinitiators for polymerization reactions and exhibit excellent photobleaching ability and low cytotoxicity, making them suitable for various photocuring materials.
Article
Biochemistry & Molecular Biology
Mahmoud Rahal, Bernadette Graff, Joumana Toufaily, Tayssir Hamieh, Guillaume Noirbent, Didier Gigmes, Frederic Dumur, Jacques Lalevee
Summary: Nine organic compounds based on the coumarin scaffold with different substituents were synthesized and used as efficient photoinitiators for free radical photopolymerization of meth(acrylate) groups under visible light irradiation. These compounds demonstrated high initiation capacity and good polymerization profiles, and were also tested in direct laser write experiments and the synthesis of photocomposites.
Article
Materials Science, Multidisciplinary
Ziqiang Zhao, Junyu Ren, Yuan Yuan, Zeying Sun, Weiben Chen, Xi Su, Guang Zhang, Long Chen
Summary: In this study, a highly crystalline and two-dimensional covalent organic framework (PTz-An-COF) based on phenothiazine was developed, which exhibited a low bandgap (1.92 eV) and broad visible-light absorption. Interestingly, PTz-An-COF demonstrated efficient photoinitiation for visible-light-induced radical polymerization of methyl acrylate. Remarkably, PTz-An-COF as a photoinitiator could be easily recycled and maintained the same catalytic activity. This work provides new insights into the development of high-performance heterogeneous photocatalysts for radical polymerization.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Binghui Bao, Jian You, Dongxiao Li, Haitao Zhan, Luhang Zhang, Mingyang Li, Tao Wang
Summary: In this study, four novel double benzylidene ketone dyes were synthesized and demonstrated to have good charge transfer characteristics and high absorption capability. These dyes can be used as photoinitiators or charge transfer sensitizers to initiate photopolymerization under specific light sources. The experiments showed that the dyes with polyarylamine groups exhibited high sensitization and initiation activities under specific light sources.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Polymer Science
Arunjunai R. S. Santha Kumar, Stephanie Allison-Logan, John R. Finnegan, Nikhil K. Singha, Muthupandian Ashokkumar, Greg Qiao
Summary: The effect of ionic liquids on RAFT polymerization was investigated, and a considerable increase in the polymerization rate constants in ionic liquids was observed. Block copolymers with varying block ratios were synthesized with precise control over their molecular weight and chain-end fidelity provided by the photoiniferter polymerization in ionic liquids was described using MALDI-ToF MS analysis.
Review
Chemistry, Multidisciplinary
Cansu Aydogan, Gorkem Yilmaz, Ataulla Shegiwal, David M. Haddleton, Yusuf Yagci
Summary: The application of photochemistry in polymer synthesis offers unique advantages compared to thermochemistry, allowing for precise control over macromolecular structure and chain length while also being environmentally friendly. Recent research has focused on utilizing photocontrolled living radical and cationic polymerizations for polymer synthesis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Zeynep Deliballi, Rezan Demir-Cakan, Baris Kiskan, Yusuf Yagci
Summary: A new approach to vulcanize commercial PVC at room temperature using elemental sulfur and an initiator is reported. The obtained crosslinked polymer with polysulfide linkages shows potential for recycling/self-healing and as cathode material for Li-S battery.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Huseyin Cem Kiliclar, Emirhan Gencosman, Yusuf Yagci
Summary: This study presents a novel visible light induced step-growth polymerization mechanism and demonstrates the potential for grafting onto polymers containing epoxide at their side chains. By changing the molar ratios of the monomers, higher molecular weight polymers can be obtained, showing the effectiveness of the chain-growth condensation polymerization mechanism.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Polymer Science
Bahar T. Ercan, Sirin S. Gultekin, Tamer Yesil, Haluk Dincalp, Sermet Koyuncu, Yusuf Yagci, Ceylan Zafer
Summary: This study reports the photoinitiated cationic polymerization of epoxy resins using four new chromophoric dyes and diphenyliodonium hexafluorophosphate under sunlight. It is shown that ISOVIII and TPDC6, which have carbazole groups, exhibited higher initiation efficiency.
POLYMER INTERNATIONAL
(2022)
Article
Polymer Science
Cansu Aydogan, F. Simal Aykac, Gorkem Yilmaz, Ye Qiu Chew, Atsushi Goto, Yusuf Yagci
Summary: A versatile strategy for the fabrication of block copolymers using a combination of two discrete living polymerization techniques has been reported. The strategy involves reversible complexation mediated living radical polymerization (RCMP) and photoinduced radical oxidation addition deactivation (PROAD) processes. The formation of the block copolymers was confirmed through various characterization techniques.
Article
Polymer Science
Mehmet Bilgehan Bilgic, Kerem Kaya, Nermin Orakdogen, Yusuf Yagci
Summary: Hydrogels, with high water absorption, biocompatibility, and non-toxic characteristics, are important polymers for various technologies. In this study, a facile synthesis of clickable polyacrylamide hydrogel was reported using photopolymerization. The gel's properties were affected by the irradiation time.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Analytical
Tugba Celiker, Faezeh Ghorbanizamani, Hichem Moulahoum, Emine Guler Celik, Kerem Tok, Figen Zihnioglu, Candan Cicek, Ruchan Sertoz, Bilgin Arda, Tuncay Goksel, Kutsal Turhan, Suna Timur, Yusuf Yagci
Summary: A rapid and easy immunofluorescence bioassay for SARS-CoV-2 detection was developed using a one-pot synthetic approach for the production of a graft fluorescent copolymer PPy-g-PCL. The assay showed a detection range of 6.03-8.7 LOG viral copy mL(-1) and a high correlation with RT-PCR data. This study provides new insights for simplified synthesis procedures of reporter molecules and their potential applications in sensing and diagnosis.
Article
Polymer Science
Mahinur Alemdar, Deniz Ceylan Tuncaboylu, Hatice Kubra Batu, Binnur Aydogan Temel
Summary: Temperature responsive Pluronic F127 micelles were combined with light-responsive coumarin bearing amphiphilic copolymers to obtain injectable gels with mechanical strength. The gels were prepared using two different methods and their rheological properties were evaluated. The study suggests that hydrogels based on PF127 and coumarin functional terpolymer amphiphiles have potential as injectable biomaterials.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Public, Environmental & Occupational Health
Gozde Deveci, Mohd Kamil, Umit Kina, Binnur Aydogan Temel, Ahmed S. Aly
Summary: The researchers identified NT4 as an important nucleoside transporter in the infectivity of malaria parasite sporozoites, but not essential for replication and growth.
PATHOGENS AND GLOBAL HEALTH
(2023)
Article
Biochemistry & Molecular Biology
Zehra Gul Coban, Huseyin Cem Kiliclar, Yusuf Yagci
Summary: Photochemical techniques have seen a revival due to their adaptability and ability to produce complex macromolecular structures, although their application in the polymerization of cyclic siloxane monomers has been limited. This study investigated the cationic ring-opening polymerization of Octamethylcyclotetrasiloxane (D4) using diphenyl iodonium hexafluorophosphate (DPI) as the initiator. Both direct and indirect initiation systems were examined, using benzophenone and pyrene to generate photochemically induced protonic acids and silylium cations for the polymerization. Kinetics of the polymerization were monitored using viscosimetry and GPC analysis. This approach has potential industrial importance for polysiloxane fabrication due to its ability to overcome challenges associated with conventional methods.
Article
Polymer Science
Gizem Kahraman, Burcu Durcak, Nergis Arsu, Evamarie Hey-Hawkins, Tarik Eren
Summary: Random copolymers containing anthracene and carborane units were synthesized via ring-opening metathesis polymerization. They exhibited various emission behaviors and mechano-chromic properties in solution and as solids. The photodimerization and photocleavage of anthracene groups in the copolymers were investigated by UV-vis spectroscopy at 350 and 254 nm, respectively. The thermal properties of the copolymers were examined from 25 to 600 degrees C under nitrogen and in air.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
H. Mirac Dizman, Nergis Arsu
Summary: In this study, gold nanoparticles (AuNps) were prepared in-situ using thioxanthone disulfide [TX-S-]2 as a photoreducing agent. These AuNps solutions were used for colorimetric determination of dopamine (DA) and serotonin (SER), two important neurotransmitters, at a micromolar level. UV-Vis spectroscopy was employed to determine the formation of AuNps, and the change in Surface Plasmon Resonance (SPR) band was observed after the addition of DA and SER, indicating color changes. The size and morphology of the AuNps were characterized using Dynamic Light Scattering (DLS) and Scanning Electron Microscope (SEM) analysis. The method demonstrated linearity in the concentration range of 7.45-24.4 μM, with a limit of detection (LOD) and limit of quantification (LOQ) of 8.4 and 28 μM for DA, and 5.41 and 18.04 μM for SER, respectively. Additionally, in-situ synthesis of AuNps in a polymer matrix with DA and SER showed consistent sizes compared to previously prepared solutions, with the color of the polymer matrix changing from colorless to purple to dark purple in just 15 minutes of irradiation.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Polymer Science
Zuemruet Ceren Ozduman, Burcu Oglakci, Derya Merve Halacoglu Bagis, Binnur Aydogan Temel, Evrim Eliguzeloglu Dalkilic
Summary: The aim of this study was to compare the physical and mechanical properties of a newly developed nano-sized hydroxyapatite fiber-reinforced composite with other composites. The results showed that fiber-reinforced composites had higher hardness and flexural strength, while particle-filled composites had lower volumetric polymerization shrinkage. Additionally, there was a correlation between the content of inorganic filler and hardness as well as volumetric polymerization shrinkage.
Article
Polymer Science
Sevinc Gulyuz, Yusuf Yagci, Baris Kiskan
Summary: A new strategy for the synthesis of self-healable/recyclable polybenzoxazine networks by exploiting dynamic B-O bond exchanges is presented in this work. The obtained films exhibit good self-healing properties and hydrolysis stability under mild conditions.
Article
Polymer Science
Burcu Alkan, Ozgun Daglar, Binnur Aydogan Temel, Hakan Durmaz, Gokhan Temel
Summary: An alternative strategy for preparing intramolecularly crosslinked soft nanoparticles using the aza-Michael addition reaction was developed. The obtained polymeric nanoparticles showed smaller hydrodynamic radii and could be further modified.
