1
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Wang G, Zhang J, Hu L, Wang J, Zhu C. Polydentate hydrazones as multitasking catalysts in visible-light-induced coupling reactions of amines. Org Biomol Chem 2023; 21:754-760. [PMID: 36598776 DOI: 10.1039/d2ob02092k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A Cu/hydrazone catalyst has been applied in the coupling reactions of anilines for the synthesis of diarylamines and azobenzenes. The copper complex that is formed in situ plays a double duty by harnessing photon energy as a photocatalyst and then by catalysing organometallic elementary steps as a transition metal catalyst. By the selection of hydrazones and bases, the reaction selectivity of aniline can be tuned between homo-coupling and its cross-coupling with arylboronic acid, exhibiting the great potential of such hydrazones in organic synthesis.
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Affiliation(s)
- Ganghu Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Jianhua Zhang
- N.O.D topia (Guangzhou) Biotechnology Co. Ltd., Guangzhou, Guangdong 510599, PR China
| | - Legen Hu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Jiaquan Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Chunyin Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
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2
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Faujdar E, Singh RK. Comparative study of poly(acrylate-co-maleimide) copolymers and poly(α-olefins-co-maleimide) copolymers of hindered phenolic Schiff base amine for lubricant applications. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-02935-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Faujdar E, Singh RK. Studies on the application of poly(
acrylate‐co‐maleic
anhydride) amides with
N
‐phenyl‐p‐phenylenediamine
as multifunctional lube additives. J Appl Polym Sci 2022. [DOI: 10.1002/app.52195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ekta Faujdar
- Advanced Crude Oil Research Centre, Analytical Sciences Division CSIR‐Indian Institute of Petroleum Dehradun Uttrakhand India
- Academic of Scientific and Innovative Research (AcSIR) Ghaziabad Uttar Pradesh India
| | - Raj K. Singh
- Advanced Crude Oil Research Centre, Analytical Sciences Division CSIR‐Indian Institute of Petroleum Dehradun Uttrakhand India
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4
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Miao C, Wang Y, Ma Z, Luo Y, Miao Y, Yuan P, Guo J, Chen G, Liu H. Synthesizing Hindered Structure Poly (p‐Phenylenediamine) by Enzymatic Catalysis and Evaluating Its Antioxidation Mechanism in Biodegradable Castor Oils. J AM OIL CHEM SOC 2021. [DOI: 10.1002/aocs.12445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Changqing Miao
- College of Chemistry and Chemical Engineering Xinxiang University 191 Jinsui Avenue Xinxiang 453003 China
| | - Yanbo Wang
- College of Chemistry and Chemical Engineering Xinxiang University 191 Jinsui Avenue Xinxiang 453003 China
| | - Zhiying Ma
- Engineering Research Center for Nanomaterials Henan University Jinming Avenue Kaifeng 475000 China
| | - Yang Luo
- College of Chemistry and Chemical Engineering Xinxiang University 191 Jinsui Avenue Xinxiang 453003 China
| | - Yu Miao
- College of Chemistry and Chemical Engineering Xinxiang University 191 Jinsui Avenue Xinxiang 453003 China
| | - Pingfang Yuan
- College of Chemistry and Chemical Engineering Xinxiang University 191 Jinsui Avenue Xinxiang 453003 China
| | - Jiao Guo
- College of Chemistry and Chemical Engineering Xinxiang University 191 Jinsui Avenue Xinxiang 453003 China
| | - Gairong Chen
- College of Chemistry and Chemical Engineering Xinxiang University 191 Jinsui Avenue Xinxiang 453003 China
| | - Hongbo Liu
- College of Materials Science and Engineering Hunan University Lushan Road (S), Yuelu District Changsha Hunan 410082 China
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5
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Sazeli S, Nath AR, Ahmad MH, Zulkifli NWM, Johan MR, Yehye WA, Voon LH. Semicarbazide and thiosemicarbazide containing butylated hydroxytoluene moiety: new potential antioxidant additives for synthetic lubricating oil. RSC Adv 2021; 11:7138-7145. [PMID: 35423237 PMCID: PMC8691112 DOI: 10.1039/d0ra10626g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 02/01/2021] [Indexed: 01/20/2023] Open
Abstract
New multipotent antioxidants (MPAOs), namely semicarbazides and thiosemicarbazides bearing thiolated butylated hydroxytoluene (BHT), were synthesized. The antioxidant activity of the synthesized compounds was evaluated using in vitro DPPH assay. Compounds containing thiosemicarbazides (5a′–h′) were found more active in free radical scavenger than semicarbazides (5a–h). Among the other compounds, compound 5f′ (IC50 of 25.47 ± 0.42 μM) showed the best antioxidant activity against DPPH radicals compared to standard antioxidant butylated hydroxytoluene (BHT). Based on DPPH results, compound 5f′ and its corresponding semicarbazide 5f were blended into trimethylolpropane trioleate (TMPTO) and isothermal differential scanning calorimetry (DSC) was carried out for the investigation of oxidative stability. At 125 °C isothermal DSC, TMPTO with 0.25 wt% of 5f′ showed 1.5 times higher oxidation stability than its corresponding semicarbazide 5f and was 2 times better than BHT. It was anticipated that due to the strong auto-synergistic effect, compound 5f′ showed promising oxidative stability to TMPTO by protecting from pre-mature oxidative degradation. New multipotent antioxidants (MPAOs), namely semicarbazides and thiosemicarbazides bearing thiolated butylated hydroxytoluene (BHT), were synthesized.![]()
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Affiliation(s)
- Syabilah Sazeli
- Nanotechnology & Catalysis Research Centre (NANOCAT), Universiti Malaya Block 3A, Inst. for Advanced Studies 50603 Kuala Lumpur Malaysia
| | - Amit R Nath
- Nanotechnology & Catalysis Research Centre (NANOCAT), Universiti Malaya Block 3A, Inst. for Advanced Studies 50603 Kuala Lumpur Malaysia
| | - Mohd Hafiz Ahmad
- Nanotechnology & Catalysis Research Centre (NANOCAT), Universiti Malaya Block 3A, Inst. for Advanced Studies 50603 Kuala Lumpur Malaysia
| | - N W M Zulkifli
- Department of Mechanical Engineering, Universiti Malaya 50603 Kuala Lumpur Malaysia
| | - Mohd Rafie Johan
- Nanotechnology & Catalysis Research Centre (NANOCAT), Universiti Malaya Block 3A, Inst. for Advanced Studies 50603 Kuala Lumpur Malaysia
| | - Wageeh A Yehye
- Nanotechnology & Catalysis Research Centre (NANOCAT), Universiti Malaya Block 3A, Inst. for Advanced Studies 50603 Kuala Lumpur Malaysia
| | - Lee Hwei Voon
- Nanotechnology & Catalysis Research Centre (NANOCAT), Universiti Malaya Block 3A, Inst. for Advanced Studies 50603 Kuala Lumpur Malaysia
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6
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Chai L, Xu L, Zhang X, Li Y. Two dinuclear copper (II) and nickel (II) complexes based on 4‐(diethylamino)salicylaldehyde: X‐ray structures, spectroscopic, electrochemical, antibacterial, Hirshfeld surfaces analyses, and time‐dependent density functional theory calculations. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6068] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Lan‐Qin Chai
- School of Chemical and Biological Engineering Lanzhou Jiaotong University Lanzhou China
| | - Li‐Yan Xu
- School of Chemical and Biological Engineering Lanzhou Jiaotong University Lanzhou China
| | - Xiao‐Fang Zhang
- School of Chemical and Biological Engineering Lanzhou Jiaotong University Lanzhou China
| | - Yao‐Xin Li
- School of Chemical and Biological Engineering Lanzhou Jiaotong University Lanzhou China
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7
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Faujdar E, Negi H, Bhonsle A, Atray N, Singh RK. Efficiency of Dodecenylsuccinic Amide of n‐Phenyl‐p‐Phenylenediammine as Novel Multifunctional Lubricant Additive for Deposit Control and Lubricity. J SURFACTANTS DETERG 2020. [DOI: 10.1002/jsde.12456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ekta Faujdar
- Academy of Scientific and Innovative Research (AcSIR) Kamla Nehru Nagar, Ghaziabad Uttar Pradesh 201 002 India
- Analytical Sciences Division CSIR‐Indian Institute of Petroleum Mohkampur, Dehradun Uttarakhand 248 005 India
| | - Himani Negi
- Academy of Scientific and Innovative Research (AcSIR) Kamla Nehru Nagar, Ghaziabad Uttar Pradesh 201 002 India
- Analytical Sciences Division CSIR‐Indian Institute of Petroleum Mohkampur, Dehradun Uttarakhand 248 005 India
| | - Aman Bhonsle
- Academy of Scientific and Innovative Research (AcSIR) Kamla Nehru Nagar, Ghaziabad Uttar Pradesh 201 002 India
- Biofuel Division, CSIR‐Indian Institute of Petroleum Mohkampur, Dehradun Uttarakhand 248 005 India
| | - Neeraj Atray
- Biofuel Division, CSIR‐Indian Institute of Petroleum Mohkampur, Dehradun Uttarakhand 248 005 India
| | - Raj K. Singh
- Analytical Sciences Division CSIR‐Indian Institute of Petroleum Mohkampur, Dehradun Uttarakhand 248 005 India
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8
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Yüksel E, Bilici A, Geçibesler İH, Kaya İ. Synthesis and antioxidant activities of phenolic Schiff base monomers and polymers. CAN J CHEM 2020. [DOI: 10.1139/cjc-2019-0307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this work, synthesis, characterization, and antioxidant activities of two Schiff base monomers (1 and 2) and their corresponding oxidation products (3 and 4) were reported. The monomers were prepared by condensation of 8-amino-2-naphthol with 2,4-dihydroxybenzaldehyde and 3,4-dihydroxybenzaldehyde, and then, they were oxidized to in alkaline medium by NaOCl to obtain the corresponding oxidation products. The compounds 1–4 were characterized by various spectral techniques. The analysis results indicated that the oxidation products had a chain structure consisting of randomly ordered phenylene and oxyphenylene units. In vitro antioxidant activities of 1–4 were evaluated against a ABTS cation radical and a DPPH free radical and compared with standard natural antioxidants, vitamin C (ascorbic acid), and vitamin E (α-tocopherol). The ferric reducing antioxidant power and ferrous-ion chelating activities of 1–4 were also determined.
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Affiliation(s)
- Esranur Yüksel
- Ministry of National Education, Kapaklı Municipal Secondary School, Tekirdağ, Turkey
| | - Ali Bilici
- Çanakkale Onsekiz Mart University, Faculty of Sciences and Arts, Department of Chemistry, Çanakkale, Turkey
| | - İbrahim Halil Geçibesler
- Bingol University, Faculty of Health Sciences, Department of Occupational Health and Safety Laboratory of Natural Product Research, Bingol 12000, Turkey
| | - İsmet Kaya
- Çanakkale Onsekiz Mart University, Faculty of Sciences and Arts, Department of Chemistry, Çanakkale, Turkey
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9
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Wang S, Yu S, Feng J, Liu S. Multifunctional lubricant additive derived from polyisobutylene succinimide dispersant. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1729172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Shengpei Wang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Shasha Yu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, People’s Republic of China
| | - Jianxiang Feng
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, People’s Republic of China
| | - Shenggao Liu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, People’s Republic of China
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10
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Murmu M, Sengupta S, Pal R, Mandal S, Murmu NC, Banerjee P. Efficient tribological properties of azomethine-functionalized chitosan as a bio-lubricant additive in paraffin oil: experimental and theoretical analysis. RSC Adv 2020; 10:33401-33416. [PMID: 35515070 PMCID: PMC9056676 DOI: 10.1039/d0ra07011d] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 08/19/2020] [Indexed: 12/17/2022] Open
Abstract
A simple condensation of chitosan (from shrimp shells) and 4-hydroxybenzaldehyde was performed to yield bio-lubricant additive comprised of azomethine functional groups to be used with paraffin lube oil in industries. The synthesized Schiff base derivative of chitosan (SBC) additive was characterized using a CHN analyzer and FT-IR spectroscopy, and the thermal stability was explored using thermogravimetry. The rheological properties of SBC additives in paraffin oil were studied and are discussed herein. The tribological properties of SBC were tested in paraffin as the base oil employing a four-ball tester with different experimental conditions (viz. the concentration of the additive, applied load, speed and time duration), following ASTM D4172A standards. The optimum concentration of the additive in the base oil was found to be 150 ppm, exhibiting minimum coefficient of friction, but with higher concentrations of additive in base oils, the coefficient of friction increased. UV-Vis spectroscopy studies were also performed to confirm the formation of SBC and dispersion stability. The determined tribological parameters, such as the coefficient of friction, mean wear scar diameters and mean wear scar volumes, were found to significantly reduce the coefficient of friction of paraffin oil upon the addition of SBC. The state of steel balls upon exposure to various experimental conditions was analyzed and explained based on outcomes from FESEM, EDX, ferrography and AFM spectroscopy. The insights into interactions of the synthesized SBC with the metal surface were explored using ab initio density functional theory, Fukui indices, molecular dynamics simulation and radial distribution function. Schiff base derivative of chitosan as biolubricant additive explored in paraffin lube oil.![]()
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Affiliation(s)
- Manilal Murmu
- Surface Engineering and Tribology Division
- Central Mechanical Engineering Research Institute
- Durgapur 713209
- India
- Academy of Scientific and Innovative Research
| | - Sirsendu Sengupta
- Surface Engineering and Tribology Division
- Central Mechanical Engineering Research Institute
- Durgapur 713209
- India
- Academy of Scientific and Innovative Research
| | - Ritam Pal
- Department of Mechanical Engineering
- Jadavpur University
- Kolkata 700032
- India
| | - Sukdeb Mandal
- Surface Engineering and Tribology Division
- Central Mechanical Engineering Research Institute
- Durgapur 713209
- India
- Academy of Scientific and Innovative Research
| | - Naresh Chandra Murmu
- Surface Engineering and Tribology Division
- Central Mechanical Engineering Research Institute
- Durgapur 713209
- India
- Academy of Scientific and Innovative Research
| | - Priyabrata Banerjee
- Surface Engineering and Tribology Division
- Central Mechanical Engineering Research Institute
- Durgapur 713209
- India
- Academy of Scientific and Innovative Research
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11
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Higgins CL, Filip SV, Afsar A, Hayes W. Increasing the antioxidant capability via the synergistic effect of coupling diphenylamine with sterically hindered phenol. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130759] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Wang S, Yu S, Feng J, Liu S. Multifunctional lubricant additive based on difluoroboron derivatives of a diphenylamine antioxidant. RSC Adv 2019; 9:35059-35067. [PMID: 35530664 PMCID: PMC9074176 DOI: 10.1039/c9ra05490a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 10/16/2019] [Indexed: 11/21/2022] Open
Abstract
A metal-free and phosphorus-free novel multifunctional additive (E)-4-((3-(tert-butyl)-2-((difluoroboranyl)oxy)-5-((octylthio)methyl)benzylidene)amino)-N-phenylaniline (difluoroboron derivative 4a) was synthesized and characterized. The results show that its antioxidation and tribological properties are better than those of base oil, diphenylamine and zinc dialkyldithiophosphate (ZDDP), and it can also increase the extreme pressure performance of the base oil. In addition, it can be found that the diphenylamine functional group, boron and fluorine are the main contributors to the excellent antioxidation and antiwear properties of difluoroboron derivative 4a, respectively. Finally, the results of X-ray photoelectron spectroscopy on the worn surfaces reveal that B2O3, Fe2O3, a N-containing organic compound and iron fluoride comprise the boundary films, which effectively improve the difluoroboron derivative 4a's antiwear properties.
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Affiliation(s)
- Shengpei Wang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences No. 1219, Zhongguan West Road Ningbo Zhejiang 315201 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Shasha Yu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences No. 1219, Zhongguan West Road Ningbo Zhejiang 315201 P. R. China
| | - Jianxiang Feng
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences No. 1219, Zhongguan West Road Ningbo Zhejiang 315201 P. R. China
| | - Shenggao Liu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences No. 1219, Zhongguan West Road Ningbo Zhejiang 315201 P. R. China
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13
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Wang S, Yu S, Feng J, Liu S. A highly efficient antioxidant based on boron and a Schiff base bridged phenolic diphenylamine: synthesis, crystal structure and thermal and antioxidant properties. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2019; 75:1274-1279. [PMID: 31484816 DOI: 10.1107/s2053229619011331] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 08/13/2019] [Indexed: 11/10/2022]
Abstract
Antioxidants can effectively protect vegetable-oil-based lubricants against oxidative degradation and prolong their service life. A novel compound, (E)-4-({3,5-di-tert-butyl-2-[(diphenylboranyl)oxy]benzylidene}amino)-N-phenylaniline (BSPD) or {2-[(4-anilinophenyl)iminomethyl-κN]-4,6-di-tert-butylphenolato-κO}diphenylboron, C39H41BN2O, was synthesized by a one-pot reaction of the Schiff base bridged phenolic diphenylamine 2,4-di-tert-butyl-6-{N-[4-(phenylamino)phenyl]carboximidoyl}phenol (SPD) with phenylboronic acid. The corresponding single-crystal X-ray study revealed that the B atom in BSPD has a typical tetrahedral geometry, and the N,O-chelated six-membered ring adopts a chair conformation. According to thermogravimetric analysis, the 5% weight-loss temperature of BSPD increases to 328 °C and the 95% weight-loss temperature is up to 414 °C. More importantly, the antioxidant capability of BSPD in vegetable oil is much better than that of commercial antioxidants [diphenylamine (DPA) and 2,6-di-tert-butyl-4-methylphenol (BHT)] and unmodified SPD.
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Affiliation(s)
- Shengpei Wang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, No. 1219 Zhongguan West Road, Ningbo City, Zhejiang Province 315201, People's Republic of China
| | - Shasha Yu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, No. 1219 Zhongguan West Road, Ningbo City, Zhejiang Province 315201, People's Republic of China
| | - Jianxiang Feng
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, No. 1219 Zhongguan West Road, Ningbo City, Zhejiang Province 315201, People's Republic of China
| | - Shenggao Liu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, No. 1219 Zhongguan West Road, Ningbo City, Zhejiang Province 315201, People's Republic of China
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14
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Huang L, Wu K, Zhang R, Ji H. Fabrication of Multicore Milli- and Microcapsules for Controlling Hydrophobic Drugs Release Using a Facile Approach. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02351] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Liyun Huang
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Kui Wu
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Rui Zhang
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
- Guangdong Provincial Key Lab of Green Chemical Product Technology, Guangzhou 510640, China
| | - Hongbing Ji
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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15
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Synthesis, Characterization, and Performance Evaluation of Sulfur-Containing Diphenylamines Based on Intramolecular Synergism. Molecules 2018; 23:molecules23020401. [PMID: 29438302 PMCID: PMC6017979 DOI: 10.3390/molecules23020401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 02/09/2018] [Accepted: 02/11/2018] [Indexed: 11/17/2022] Open
Abstract
To obtain novel structural antioxidants that have different antioxidant mechanisms, four 2-(alkylthio)-N-(4-(phenylamino)phenyl)acetamides 2a-d as dual functional antioxidants are designed, synthesized, and confirmed by ¹H-NMR, FTIR, MS, and elemental analysis. The antioxidant behavior of compounds 2a-d as additives of base oil triisodecyl trimellitate (TIDTM) is evaluated by non-isothermal and isothermal DSC analyses. The results showed all compounds can greatly increase the incipient oxidation temperature (IOT) and oxidation induction time (OIT) of TIDTM, especially, compound 2c exhibited an OIT value of 72.5 min at 230 °C, which is almost 28 times the length of TIDTM. Moreover, compounds 2a-d do not affect the tribological performance of TIDTM. The mechanism of antioxidants involved an intramolecular synergism are proposed. This work demonstrates compound 2c can be used as a novel potential antioxidant additive of TIDTM; in addition, it would inspire the emergence of highly potent antioxidants with different antioxidant mechanisms.
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16
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Yu S, Liu S. Multifunctional Antioxidants with High Activity at Elevated Temperatures Based on Intramolecular Synergism. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701577] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Shasha Yu
- Polymers and Composites Division; Ningbo Institute of Materials Technology and Engineering; Chinese Academy of Sciences; No. 1219 Zhongguan West Road 315201 Ningbo China
| | - Shenggao Liu
- Polymers and Composites Division; Ningbo Institute of Materials Technology and Engineering; Chinese Academy of Sciences; No. 1219 Zhongguan West Road 315201 Ningbo China
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17
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Yu S, Wang Y, Ma Y, Wang L, Zhu J, Liu S. Structure, thermal stability, antioxidant activity and DFT studies of trisphenols and related phenols. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.07.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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