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Pyszka I, Jędrzejewska B. Highly Efficient Photoinitiation Systems Based on Dibenzo[a,c]phenazine Sensitivity to Visible Light for Dentistry. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2597. [PMID: 38893862 PMCID: PMC11173425 DOI: 10.3390/ma17112597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 05/20/2024] [Accepted: 05/25/2024] [Indexed: 06/21/2024]
Abstract
In this work, photoinitiation systems based on dibenzo[a,c]phenazine sensitivity to visible light were designed for their potential application in dentistry. Modification of the structure of dibenzo[a,c]phenazine consisted of introducing electron-donating and electron-withdrawing substituents and heavy atoms into position 11. The synthesized compounds are able to absorb radiation emitted by dental lamps during photoinitiation of the polymerization process. In the presence of acrylates, dibenzo[a,c]phenazines show excellent photoinitiating abilities in systems containing an electron donor or a hydrogen-atom donor as a second component. The developed systems initiate the polymerization process comparable to a commercial photoinitiator, i.e., camphorquinone. Moreover, the performed studies showed a significant shortening of the polymerization time and a reduction in the amount of light absorber. This indicates that polymeric materials are obtained at a similar rate despite a significant reduction in the concentration of the newly developed two-component photoinitiating systems.
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Affiliation(s)
- Ilona Pyszka
- Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, ul. Seminaryjna 3, 85-326 Bydgoszcz, Poland
| | - Beata Jędrzejewska
- Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, ul. Seminaryjna 3, 85-326 Bydgoszcz, Poland
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Selvaraj K, Arumugam H, Muthukaruppan A, Kannaiyan SK, Krishnan S, Peethambaram P, Magaraphan R, Kannaiyan D. Supercapacitor and high k properties of CNT-PbS reinforced quinoxaline amine based polybenzoxazine composites. SOFT MATTER 2022; 18:8779-8791. [PMID: 36350261 DOI: 10.1039/d2sm00737a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The new 2,3-diphenylquinoxalin-6-amine (dpqa) was designed and synthesized through an efficient and high yield condensation process. Data from FTIR and 1H-NMR spectroscopy have been adopted to ascertain the molecular structure of benzoxazine compounds. Furthermore, the quinoxaline amine based benzoxazine (BA-dpqa) was synthesized using bisphenol-A and paraformaldehyde followed by combining different weight percentages (1, 5 and 10 wt%) of (3-glycidyloxypropyl)trimethoxysilane functionalized CNT-PbS with benzoxazine to obtain nanocomposites. The thermal and morphological properties of the quinoxaline amine based neat polybenzoxazine matrix poly(BA-dpqa) and CNT-PbS/poly(BA-dpqa) composites were analysed by XRD, TGA and SEM analysis. The values of the degradation temperature (Td) obtained for neat poly(BA-dpqa) and 10 wt% CNT-PbS/poly(BA-dpqa) composites are 414 °C and 424 °C. Furthermore, the chair yield percentage was calculated as 33% and 35% respectively. The water contact angle of polybenzoxazine gradually increased from 89° to 127° proportional to the content of CNT-PbS. Among the composites, 10 wt% CNT-PbS reinforced poly(BA-dpqa) nanocomposites possess higher dielectric constant (k = 11.0) than other composites. The pseudocapacitor nature of the prepared electrodes is demonstrated by the good electrochemical performance according to the CV curve. Also, the prepared 10 wt% CNT-PbS/poly(BA-dpqa) (637 F g-1 at 5 A g-1 and 11.8 Ω) electrode shows better capacitance and lower charge transfer resistance values than 5 wt% CNT-PbS/poly(BA-dpqa) (613 F g-1 at 5 A g-1 and 13.2 Ω) and neat poly(BA-dpqa) (105 F g-1 at 5 A g-1 and 15.6 Ω) according to the charge/discharge curves and EIS spectra. 10 wt% CNT-PbS/poly(BA-dpqa) shows 99.2% cycling efficiency even at the 2000th cycle, which indicates the good electrochemical performance of the prepared electrode.
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Affiliation(s)
- Kumar Selvaraj
- Department of Chemistry, Thiruvalluvar University, Vellore 632115, India.
- Polymer Processing and Polymer Nanomaterials Research Unit, Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
| | - Hariharan Arumugam
- Polymer Engineering Laboratory, PSG Institute of Technology and Applied Research, Neelambur, Coimbatore 641 062, India
| | - Alagar Muthukaruppan
- Polymer Engineering Laboratory, PSG Institute of Technology and Applied Research, Neelambur, Coimbatore 641 062, India
| | - Sathish Kumar Kannaiyan
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai, 603 110, India
| | | | | | - Rathanawan Magaraphan
- Polymer Processing and Polymer Nanomaterials Research Unit, Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
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Patil SP, Shinde SK, Patil SS. Coconut endocarp shell ash (CESA): a non-conventional catalyst for green synthesis of 2-amino-4H-benzochromenes. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04847-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Bakhtiarian M, Khodaei MM. Pyridinium-based dual acidic ionic liquid supported on the pectin for efficient synthesis of pyrazoles. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Coconut endocarp shell ash (CESA): a versatile and waste-originated catalyst for the synthesis of tetrahydrobenzo[b]pyrans and 1, 4-dihydropyridines. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04770-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Pyszka I, Kucybała Z, Jędrzejewska B. Effective Singlet Oxygen Sensitizers Based on the Phenazine Skeleton as Efficient Light Absorbers in Dye Photoinitiating Systems for Radical Polymerization of Acrylates. MATERIALS (BASEL, SWITZERLAND) 2021; 14:3085. [PMID: 34200054 PMCID: PMC8200244 DOI: 10.3390/ma14113085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/25/2021] [Accepted: 05/31/2021] [Indexed: 12/15/2022]
Abstract
A series of dyes based on the phenazine skeleton were synthesized. They differed in the number of conjugated double bonds, the arrangement of aromatic rings (linear and/or angular system), as well as the number and position of nitrogen atoms in the molecule. These compounds were investigated as potential singlet oxygen sensitizers and visible light absorbers in dye photoinitiating systems for radical polymerization. The quantum yield of the singlet oxygen formation was determined by the comparative method based on the 1H NMR spectra recorded for the tested dyes in the presence of 2,3-diphenyl-p-dioxene before and after irradiation. The quantum yield of the triplet state formation was estimated based on the transient absorption spectra recorded using the nanosecond flash photolysis technique. The effectiveness of the dye photoinitiating system was characterized by the initial rate of trimethylolpropane triacrylate (TMPTA) polymerization. In the investigated photoinitiating systems, the sensitizer was an electron acceptor, whereas the co-initiator was an electron donor. The effectiveness of TMPTA photoinitiated polymerization clearly depended on the arrangement of aromatic rings and the number of nitrogen atoms in the modified phenazine structure as well as the quantum yield of the triplet state formation of the photosensitizer in the visible light region.
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Affiliation(s)
- Ilona Pyszka
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, 85-326 Bydgoszcz, Poland;
| | | | - Beata Jędrzejewska
- Faculty of Chemical Technology and Engineering, UTP University of Science and Technology, 85-326 Bydgoszcz, Poland;
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Tamuli KJ, Nath S, Bordoloi M. In water organic synthesis: Introducing itaconic acid as a recyclable acidic promoter for efficient and scalable synthesis of quinoxaline derivatives at room temperature. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4231] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kashyap J. Tamuli
- Chemical Sciences and Technology Division CSIR‐North East Institute of Science & Technology Jorhat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
| | - Shyamalendu Nath
- Chemical Sciences and Technology Division CSIR‐North East Institute of Science & Technology Jorhat India
| | - Manobjyoti Bordoloi
- Chemical Sciences and Technology Division CSIR‐North East Institute of Science & Technology Jorhat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
- Department of Chemistry Assam University Silchar India
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