Category: 10287-53-3

Xu, Yuanyuan published the artcileRadical Photopolymerization Using 1,4-Dihydropyrrolo[3,2-b]pyrrole Derivatives Prepared via One-Pot Synthesis, Quality Control of 10287-53-3, the publication is ACS Omega (2021), 6(32), 20902-20911, database is CAplus and MEDLINE.

Radical photopolymerization has attracted significant attention for manufacturing products with complicated structures. Herein, the synthesized 1,4-bis(4-bromophenyl)-2,5-bis(4-nitrophenyl)-1,4-dihydropyrrole[3,2-b]pyrrole (PyBN, I, CAS Number 2561424-73-3) is found to show varying photoactivity upon irradiation at different wavelengths. PyBN affords two main absorption bands, and its maximum absorption peak is at 462 nm, attributing to its strong intramol. charge transfer property based on the donor-acceptor structure. It efficiently photoinitiates the radical photopolymerization of different (meth)acrylate materials under 365 and 395 nm LED irradiation The highest double bond conversion of 99.86% is achieved for these materials. Under 470 nm LED, PyBN does not show mol. structure change from photolysis results as a result of intramol. charge transfer. Therefore, PyBN shows wavelength-selective photoactivity with potential application in dual-wavelength volumetric additive manufacturing A unique solid product is successfully fabricated using a 365 nm LED with co-irradiation of a 470 nm LED. Addnl., PyBN incorporating camphorquinone (CQ) as a two-component visible light photoinitiator system is investigated under 470 nm LED irradiation As PyBN has a charge transfer activity at 470 nm, the combination with CQ exhibits a good synergistic interaction. Besides nitro-based PyBN, a methyl-based PyBC was prepared as a reference compound

ACS Omega published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C20H17FO4S, Quality Control of 10287-53-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sun, Ke published the artcileHigh-performance sunlight induced polymerization using novel push-pull dyes with high light absorption properties, Recommanded Product: Ethyl 4-dimethylaminobenzoate, the publication is European Polymer Journal (2021), 110410, database is CAplus.

In this article, a series of three-component photoinitiating systems (PISs) based on push-pull dyes are proposed. The systems are composed of the newly synthesized push-pull dyes and different co-initiators, namely an iodonium salt and a tertiary amine (Et dimethylaminobenzoate EDB). Photoinitiation abilities and photochem. properties of the different investigated photoinitiating systems were studied in detail. Notably, the mechanisms related to the polymerization efficiencies were determined using different techniques such as UV-visible absorption and fluorescence spectroscopy. Moreover, the photoinitiation abilities of the three-component systems for the sunlight-induced polymerization processes were also examined, indicating that sunlight can act as an effective light source for photopolymerization Finally, 3D patterns with a spatial resolution were successfully produced by the direct laser writing (DLW) approach, even with photosensitive resins containing silica fillers.

European Polymer Journal published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C10H15NS, Recommanded Product: Ethyl 4-dimethylaminobenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

You, Jian published the artcileNovel Norrish type I flavonoid photoinitiator for safe LED light with high activity and low toxicity by inhibiting the ESIPT process, HPLC of Formula: 10287-53-3, the publication is Dyes and Pigments (2021), 108865, database is CAplus.

In this study, flavonoid with N,N-diphenylamino group, 2-(4-(diphenylamino)phenyl)-3-hydroxy-4H-chromen-4-one (3HF-OH) was designed and synthesized as low-toxicity photoinitiator for photopolymerization under safe visible LED sources, however, low photoinitiation activity of 3HF-OH was found due to the excited state proton transfer (ESIPT) process. Hence, by replacing the 3-position hydroxyl group of 3HF-OH with benzoyl chloride and benzenesulfonyl chloride, flavonol carboxylate (3HF-C) and flavonol sulfonate (3HF-S) were synthesized, resp. 3HF-C and 3HF-S showed not only one-component photoinitiating activity but also two-component photoinitiating activity when they were used with triethanolamine (TEOA) and iodonium salt (ONI) under safe, long-wavelength LED soft light sources. Photopolymerization kinetics reveals that photoinitiator 3HFs at low concentration exhibits the high polymerization rate and conversion. Results also showed that 3HF-S has much higher photoinitiation activity during photopolymerization compared with 3HF-OH and 3HF-C. The high extinction coefficient and aggregation-induced emission (AIE) characteristics of 3HF-S were observed, which proved that reducing the photoinitiator usage can effectively progress the photopolymerization activity. At the same time, the low usage of 3HF-S further reduces the toxicity of the cured material. Through ESR (ESR) experiment, the photoinitiation and sensitization mechanisms of these photoinitiators were observed The school badge structure of hydrogels could be successfully 3D printed with 3HF-S and the stiffness of the structure was sufficient for further processing without breaking the structure. Moreover, the use of the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) method confirmed the lower toxicity for the final photopolymer provided.

Dyes and Pigments published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C14H10N2O, HPLC of Formula: 10287-53-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Sandomierski, Mariusz published the artcileSilica-filled methacrylic composites with extremely high compressive strength, Application of Ethyl 4-dimethylaminobenzoate, the publication is Journal of the Mechanical Behavior of Biomedical Materials (2021), 104319, database is CAplus and MEDLINE.

SYLOID 244 has never been applied as a filler in composites with potential dental application. Therefore, the aim of research was to apply this silica in its unmodified and diazonium salt-modified forms in different mass ratios as fillers in light-cured methacrylic composites. The effectiveness of modification process was confirmed with the use of Raman spectroscopy. Methacrylic composites with the modified and unmodified SYLOID 244, as well as unfilled resin as a control group were prepared Their basic physicochem. properties, such as depth of cure, mass stability during incubation in saline, flexural and compressive strengths were examined A pos. effect of SYLOID 244 modification on the properties of the examined composites was also demonstrated. The obtained results proved the high applicability of SYLOID 244 as a filler in composites with potential dental applications.

Journal of the Mechanical Behavior of Biomedical Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Application of Ethyl 4-dimethylaminobenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Liu, Shaohui published the artcileNew multifunctional benzophenone-based photoinitiators with high migration stability and their applications in 3D printing, Category: esters-buliding-blocks, the publication is Materials Chemistry Frontiers (2021), 5(4), 1982-1994, database is CAplus.

In this paper, seven new photoinitiators based on the benzophenone scaffold are specifically designed for photopolymerization under mild conditions upon light-emitting diode (LED) irradiation, i.e. four benzophenone-triphenylamine photoinitiators (denoted as BT1-BT4) and three benzophenone-carbazole photoinitiators (denoted as BC1-BC3). Noticeably, these structures have never been reported in the literature except for BT4, so these mols. have been specifically designed for photopolymerization applications. Remarkably, various combinations of chem. groups were investigated in this work to determine the effects of the substitution patterns on their photoinitiation abilities. The formation of benzophenone-triphenylamine and benzophenone-carbazole hybrid structures not only contributes to red-shift of the absorption maxima but also strongly enhances their molar extinction coefficients The different compounds showed high photoinitiation abilities upon irradiation with an LED@405 nm, and the free radical photopolymerization of acrylates and the cationic polymerization of epoxides could be promoted with high final function conversions (e.g. 77% for the BT3/iodonium salt/amine system in free radical photopolymerization). Remarkably, these new PIs are also able to sensitize sulfonium salts upon irradiation @405 nm. Markedly, because of the benzophenone moiety, a monocomponent Type II PI behavior could be observed, e.g. these compounds could initiate the polymerization alone. Remarkably, benzophenone-triphenylamine compounds BT2, BT3 and BT4 exhibited better hydrogen abstraction abilities as Type II photoinitiators than the benchmark and com. photoinitiator 2-isopropylthioxanthone in the absence of amines as well as in the presence of amines. Furthermore, the interaction between the photoinitiators and the different additives was investigated by steady state photolysis and fluorescence quenching experiments The free radical generation in the BT3/amine system was confirmed by the ESR-spin trapping technique, and the chem. mechanisms related to the polymerization efficiency are discussed. In addition, the migration stability of BT3 was investigated, which was excellent due to its high mol. weight and its trifunctional character. Finally, the three-component photoinitiating system based on BT3 was successfully applied in 3D printing and the 3D patterns showed a good spatial resolution

Materials Chemistry Frontiers published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Hermann, Aurelien published the artcileComparative study of the impact of additives against oxygen inhibition on pendulum hardness and abrasion resistance for UV-curable wood finishes, Name: Ethyl 4-dimethylaminobenzoate, the publication is Progress in Organic Coatings (2021), 106266, database is CAplus.

The multiple advantages of UV-curable coatings, such as high curing speeds and crosslinking densities, low VOC and energy consumption led to a widespread interest for a wide range of applications. Free-radical photopolymerization constitutes one of the most used methods of polymerization However, oxygen present in the atm. is able to inhibit radical formation and propagation, which is considered a major drawback. Among all the strategies developed for reducing the oxygen inhibition, the addition of reactive additives is often preferred. This method does not require major changes in the production lines of the industries or in the formulations compositions The efficiency of reactive additives against oxygen inhibition has been investigated in multiple studies, but in different exptl. conditions. The addition of the reactive additives can also influence coatings hardness and abrasion resistance, which are considered important mech. properties. The aim of this study is to evaluate additives overall performances. Eleven of the chosen additives were previously described in the literature. The four remaining are com. products never used for that application, such as a polyhedral oligomeric silsesquioxane bearing a thiol function, which later showed some of the best results. Reduction of oxygen inhibition was analyzed by photo differential scanning calorimetry (Photo-DSC) and Confocal Raman Micro-spectroscopy (CRM). Pendulum hardness and abrasion resistance measurements were used to determine the influence of the additives on the mech. properties of the coatings. The results obtained show that most of the additives tested had reducing effect on the pendulum hardness, but helped in improving the abrasion resistance.

Progress in Organic Coatings published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Name: Ethyl 4-dimethylaminobenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Peters, Marius published the artcileCationic Iridium(I) NHC-Phosphinidene Complexes and Their Application in Hydrogen Isotope Exchange Reactions, Quality Control of 10287-53-3, the publication is European Journal of Inorganic Chemistry (2022), 2022(16), e202200148, database is CAplus.

The reaction of the dimeric iridium complex [Ir(cod)Cl]₂ (cod=1,5-cyclooctadiene) with the N-heterocyclic carbene-phosphinidene adduct (IDipp)PH (1, IDipp = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene) afforded the neutral bimetallic iridium(I) complex [μ-{(IDipp)PH}{Ir(cod)Cl}₂] (2), and further addition of IDipp(PH) (1) yielded the corresponding monometallic iridium(I) complex [{(IDipp)PH}Ir(cod)Cl] (3). Dechlorination of these complexes with sodium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate (NaBAr^F₄) yielded their cationic derivatives [{μ-(IDipp)PH}{Ir(cod)}₂{μ-Cl}][BAr^F₄] (4) and [{(IDipp)PH}Ir(cod)(PPh₃)][BAr^F₄] (5). All complexes were structurally characterized and showed the expected square-planar coordination geometry and significant polarization of the P-C bond of the NHC-phosphinidene adduct upon metal coordination. The complexes 4 and 5 were tested for their applicability in catalytic H/D exchange reactions, and both complexes showed high activity for a broad range of aromatic substrates, ranging from ketones, amides, esters, nitro compounds and heterocycles.

European Journal of Inorganic Chemistry published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Quality Control of 10287-53-3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Cardoso, Ruthinea Faria de Moraes published the artcilePhysicochemical characterization, water sorption and solubility of adhesive systems incorporated with titanium tetrafluoride, and its influence on dentin permeability, Formula: C11H15NO2, the publication is Journal of the Mechanical Behavior of Biomedical Materials (2021), 104453, database is CAplus and MEDLINE.

Titanium tetrafluoride (TiF4) in an aqueous solution can decrease dentin permeability, but some effects of its incorporation into adhesive systems are not yet known. Therefore, the aim of this study was to characterize the physicochem., water sorption (WS) and solubility (SL) properties of two adhesive systems (Clearfil SE Bond/C and Scotchbond Universal/S) incorporated with 0.0% (T0), 2.5% (T2) and 4.0% (T4) titanium tetrafluoride (TiF4), and determine dentin permeability (L) after application of these adhesive systems both immediately afterwards (baseline) and after 6 mo of storage. The physicochem. analyses of the incorporated solutions were performed based on evaluating particle size (PS), polydispersity index (PDI) by dynamic light scattering, and zeta potential (ZP) by electrophoresis. WS and SL tests followed ISO 4049 standards, and used a 7-day water storage period. The L test was performed by analyzing human dentin disks before and after adhesive system application, and after storage. PS and PDI were higher for CT0 and ST4 (p < 0.0001; ANOVA, Tukey). ZP was lower for CT4, ST2 and ST4 (p < 0.0001; ANOVA, Tukey). A 4.0% TiF4 incorporation showed higher WS (p < 0.05; Mann Whitney, Kruskal Wallis, Dunn). Higher SL was observed for CT0 and ST4 (p < 0.05; Mann Whitney, Kruskal Wallis, Dunn). The L value at baseline was lower for ST4, but was not different from the CT4 groups after storage (p < 0.05; Mann Whitney, Kruskal Wallis, Dunn). It can be concluded that TiF4 affected the colloidal stability of Scotchbond, but did not alter the other properties. The 2.5% TiF4 did not affect the PDI, WS or L of the Clearfil, and can be considered an alternative for reducing hybrid layer degradation

Journal of the Mechanical Behavior of Biomedical Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Formula: C11H15NO2.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Alkattan, Rana published the artcileA multi-functional dentine bonding system combining a phosphate monomer with eugenyl methacrylate, Application of Ethyl 4-dimethylaminobenzoate, the publication is Dental Materials, database is CAplus and MEDLINE.

The tooth-resin composite interface is frequently associated with failure because of microbial contamination, hydrolytic and collagenolytic degradation Thus, designing a dentin bonding system (DBS) with an intrinsically antimicrobial polymerisable monomer is of significance especially if it can be used with self-etching primers enabling resistance to degradation of the interface.Exptl. adhesives were developed incorporating eugenyl methacrylate (EgMA) at concentrations of 0,10 or 20 wt%, designated as EgMA0, EgMA10 and EgMA20, resp., for use as a two-step self-etch DBS with the functional monomer bis[2-(methacryloyloxy) ethyl] phosphate (BMEP) in the primer. The curing, thermal and wettability properties of the adhesives were determined, and hybrid layer formation was characterised by confocal laser scanning microscopy, microtensile bond strengths (μTBS) and nanoleakage by back-scattered SEM. In situ zymog. was used to assess MMP inhibitory activity of the BMEP-EgMA DBS.EgMA in the adhesives lowered the polymerization exotherm and resulted in higher Tg, without neg. affecting degree of conversion. Water sorption and solubility were significantly lower with higher concentrations of EgMA in the adhesive. The formation of a distinct hybrid layer was evident from confocal images with the different adhesives, while EgMA20 yielded the highest μTBS post water storage challenges and lowest nanoleakage after 6 mo. The exptl. DBS exhibited minimal to no MMP activity at 3 mo.The hydrophobic nature of EgMA and high cross-link d. exerts considerable benefits in lowering water uptake and polymerization exotherm. The application of EgMA, adhesives in conjunction with BMEP in a multi-functional self-etching DBS can resist MMP activity, hence, enhance longevity of the dentin-resin composite interface.

Dental Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Application of Ethyl 4-dimethylaminobenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Bergeron, Clara published the artcileA low-shrinkage, hydrophobic, degradation-resistant, antimicrobial dental composite using a fluorinated acrylate and an oxirane, Recommanded Product: Ethyl 4-dimethylaminobenzoate, the publication is Journal of Applied Biomaterials & Functional Materials (2022), 1-14, database is CAplus and MEDLINE.

Objective: To develop a low shrinkage, hydrophobic, degradation-resistant, antimicrobial dental composite using a fluorinated acrylate, and a difunctional oxirane. Methods: The effects of a fluorinated acrylate (2-(perfluorooctyl)ethyl acrylate; PFOEA), a difunctional oxirane (EPALLOY 5001; EP5001), and a three-component initiator system (camphorquinone/ethyl 4-dimethylaminobenzoate/4- Isopropyl-4′-methyldiphenyl iodonium Tetrakis (pentafluorophenyl) borate; CQ/EDMAB/Borate) on bisphenol A glycidyl dimethacrylate: triethylene glycol dimethacrylate (BisGMA:TEGDMA) composite surface hardness, degree of monomerto- polymer conversion, hydrophobicity, translucency, mech. properties, polymerization shrinkage and shrinkage stress, degradation, water imbibition, and antimicrobial properties were determined Results: Overall the exptl. composites had comparable mech. properties and lower volumetric polymerization shrinkage and shrinkage stress as compared to BisGMA:TEGDMA controls. Addition of PFOEA increased composite hydrophobicity, but it decreased degree of cure, ultimate transverse strength, and translucency. It also decreased polymerization shrinkage and shrinkage stress. The use of the CQ/EDMAB/Borate initiator system was beneficial for the cure and mech. properties of the 30wt./weight PFOEA group. However, it decreased the hydrophobicity and translucency of those composites. The addition of EP5001, at the low concentration used in this work, did not contribute to reduced polymerization volumetric shrinkage or antimicrobial properties, but it did reduce shrinkage stress. Conclusions: A mech. viable hydrophobic composite system with reduced polymerization shrinkage and shrinkage stress has been developed by adding PFOEA and EP5001. However, the addition of EP5001 did not render the composite antimicrobial due to the low concentration used. Further research is needed to determine the lowest concentration at which EP5001 provides antimicrobial activity. The composites developed here have the potential to improve longevity of traditional BisGMA:TEGDMA composite systems.

Journal of Applied Biomaterials & Functional Materials published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Recommanded Product: Ethyl 4-dimethylaminobenzoate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics