Open journal of physical chemistry最新文献

Reprocessable Non-Isocyanate Polyurethane Vitrimers 可再加工的非异氰酸酯聚氨酯玻璃体

Open journal of physical chemistry Pub Date : 2023-09-09 DOI: 10.17352/ojc.000032

Chrobok Anna, Kiełkiewicz Damian, Siewniak Agnieszka

{"title":"Reprocessable Non-Isocyanate Polyurethane Vitrimers","authors":"Chrobok Anna, Kiełkiewicz Damian, Siewniak Agnieszka","doi":"10.17352/ojc.000032","DOIUrl":"https://doi.org/10.17352/ojc.000032","url":null,"abstract":"Non-isocyanate polyurethanes (NIPUs, polyhydroxyurethanes, PHUs), have emerged as sustainable alternatives to conventional isocyanate-polyol polyurethanes. However, the permanent cross-links in traditional linear, crosslinked polyhydroxyurethane polymer networks hinder their recyclability for high-value applications. In this study, we provide a comprehensive overview of polyhydroxyurethane vitrimers – polymers with intrinsic recyclability – containing dynamic covalent adaptable bonds that allow them to be reprocessed or self-healed under external stimuli such as heat or solvents. These materials exhibit a unique combination of the attributes of thermosets, such as improved heat stability, solvent resistance or enhanced mechanical properties, and the reprocessability of thermoplastics. Various strategies have been explored to enable the reprocessability of PHUs. External catalysts, such as 4-(dimethylamino)pyridine (DMAP) have been used to facilitate exchange reactions and promote reprocessing. Additionally, the use of functionalized silica nanoparticles as reinforcing fillers has influenced the material’s behavior during reprocessing. Another method involved the incorporation of dynamic disulfide bonds to expedite reprocessing times for PHU networks, while dissociative dynamic chemistry has enabled self-healing behavior in certain partially cross-linked NIPUs. These advancements demonstrate the potential for tailoring the reprocessability and mechanical attributes of NIPUs, paving the way for sustainable and versatile polymeric materials, and addressing the environmental concerns associated with traditional polyurethanes.","PeriodicalId":19563,"journal":{"name":"Open journal of physical chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136194201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical spectroscopic analysis, supercapacitance, photocatalysis of BaTixFe12-(4/3)xO19 hexagonal nanoparticles BaTixFe12-(4/3)xO19六方纳米粒子的光谱分析、超电容、光催化

Open journal of physical chemistry Pub Date : 2023-08-22 DOI: 10.17352/ojc.000031

Ghoneim Amina Ibrahim

{"title":"Optical spectroscopic analysis, supercapacitance, photocatalysis of BaTixFe12-(4/3)xO19 hexagonal nanoparticles","authors":"Ghoneim Amina Ibrahim","doi":"10.17352/ojc.000031","DOIUrl":"https://doi.org/10.17352/ojc.000031","url":null,"abstract":"Obviously, BaTixFe12-(4/3)xO19 Hexagonal nanocrystals are excellent candidates as photocatalysts in water purification, as well as using them as electrode materials for supercapacitors and energy storage applications. M-Type Hexagonal nanoparticles (BaTixFe12-(4/3)xO19, 0 ≤ x ≤ 1) with the magneto-plumbite structure were formerly synthesized by co-precipitation procedure and investigated by several techniques such as XRD, FT-IR, Raman, Photoluminescence and UV-VL. XRD and FT-IR confirmed the structure, and Raman spectra showed 12 characterizing summits. Photoluminescence emission spectra indicated two summits at 448 and 501 nm. Optical UV-VL spectroscopic analysis parameters showed dependence on λ and x. Obviously, BaTi0.75Fe11O19 nanocrystals as a sort of M-Type Hexagonal Ferrites showed excellent Photocatalytic activity on the Degradation of Organic Dyes like; Crystal Violet, Methyl Orange, … etc. Furthermore; these nanocrystals possess excellent electrochemical performance; which in turn introduces these materials for Supercapacitors Applications. Thus, the Photo-catalytic activity of BaTi0.75Fe11O19 nanocrystals for the decolorization of Crystal Violet (CV) dye (1 × 10-5 M) illuminated excellent photocatalytic efficiency reaching ≈ 85%. On the other hand; BaTi0.75Fe11O19 nanoparticles exhibited a specific capacitance of 1858 mF/g at 50 mV/s. The current study introduces promising applications of BaTi0.75Fe11O19 nanoparticles as electrode materials for super capacitance and energy storage.","PeriodicalId":19563,"journal":{"name":"Open journal of physical chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85508906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reclamation of wastewater polluted with antihypertensive drug residues by the biological+solar-photocatalytic sequential treatment plant 生物+太阳-光催化顺序处理厂处理降压药残留污染废水的研究

Open journal of physical chemistry Pub Date : 2023-03-11 DOI: 10.17352/ojc.000030

Aliste Marina, Pérez-Lucas Gabriel, El Aatik Abderrazak, Hernández Virginia, Navarro Ginés, Fenoll José, Navarro Simón

{"title":"Reclamation of wastewater polluted with antihypertensive drug residues by the biological+solar-photocatalytic sequential treatment plant","authors":"Aliste Marina, Pérez-Lucas Gabriel, El Aatik Abderrazak, Hernández Virginia, Navarro Ginés, Fenoll José, Navarro Simón","doi":"10.17352/ojc.000030","DOIUrl":"https://doi.org/10.17352/ojc.000030","url":null,"abstract":"The quality of polluted wastewater processed by conventional Wastewater Treatment Plants (WWTPs) is in some cases insufficient to reach the degree of purity required. Pharmaceuticals are frequently identified in the aquatic environment, owing to their constant release from WWTPs. Thus, in recent years, they are cataloged as pseudo-persistent pollutants having been recognized as potentially harmful to public health and environmental concern. This work has focused on the removal of 3 antihypertensive pharmaceuticals (furosemide, irbesartan, and valsartan) from aqueous waste solutions using a sequential biological-photocatalytic (TiO2/Na2S2O8) treatment under natural sunlight. Pharmaceutical residues were isolated from water by solid phase extraction (SPE) and analyzed by HPLC-QqQ-MS2. Biodegradation was greater than 65% and 70% for irbesartan and furosemide, respectively, while valsartan was highly biodegradable (> 96%). Next, photocatalytic treatment was applied and just 200 kJ m-2 was required to remove 90 % of micropollutants residues from the effluent. Therefore, the coupling of biological treatment to solar heterogeneous photocatalysis constitutes a valuable instrument to detoxify polluted wastewater.","PeriodicalId":19563,"journal":{"name":"Open journal of physical chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78947374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antioxidant activity assay and determination of phenolic and flavonoid content of Libho (Ficus Septica Burm. F) fruits 榕树抗氧化活性测定及酚类黄酮含量测定。F)水果

Open journal of physical chemistry Pub Date : 2022-10-14 DOI: 10.17352/ojc.000029

Yamin Yamin, Andriani Rina, Sabarudin Sabarudin, Haijah Nur, Kasmawati Henny

{"title":"Antioxidant activity assay and determination of phenolic and flavonoid content of Libho (Ficus Septica Burm. F) fruits","authors":"Yamin Yamin, Andriani Rina, Sabarudin Sabarudin, Haijah Nur, Kasmawati Henny","doi":"10.17352/ojc.000029","DOIUrl":"https://doi.org/10.17352/ojc.000029","url":null,"abstract":"Background: One of the plants used in Indonesian traditional medicine Libho (Ficus Septica Burm. F) is traditionally used to treat some diseases, including malaria, diarrhea, diabetes, analgesic, antifungal, dysentery, anthelmintic, antioxidant, hemostatic and anti-inflammatory. Purpose: The purpose of the study is to investigate the potential in vitro antioxidant activity assay and phytochemical content of Libho fruits. Methods: Libho leaves powder was extracted with the maceration method Antioxidant activity was evaluated using ABTS cation and CUPRAC radicals. Total phenolic content was determined using the Folin-Ciocalteau method. Meanwhile, the total flavonoid content was determined using the aluminum chloride complex colorimetric method; Results: Extract and fraction of Ficus Septica Burm. F fruits have the strongest antioxidant potential. The ethyl acetate fraction showed the strongest antioxidant activity on both ABTS and CUPRAC radicals with IC50 values of 6.33 ± 0.01 µg/mL and 11.64 ± 0.28 µg/mL, respectively. Ethyl acetate fraction also showed high phenolic and flavonoid content with values of 28 ± 0.05 mg GAE/100 mg sample and 43.08 ± 0.48 mg QE/100 mg sample, respectively. Conclusion: Ethyl acetate fraction has the potential to be used as a source of natural antioxidants and has the potential to be used as a nutraceutical.","PeriodicalId":19563,"journal":{"name":"Open journal of physical chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82380559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of optically pure calix[4]arenes derived from Evans oxazolidinone and/or pyranose 由Evans恶唑烷酮和/或吡喃糖衍生的光学纯杯[4]芳烃的合成

Open journal of physical chemistry Pub Date : 2022-10-01 DOI: 10.17352/ojc.000028

Bauder Claude, Sémeril David

引用次数: 0

Nano porous systems for storing hydrogen-based clean fuel 用于储存氢基清洁燃料的纳米多孔系统

Open journal of physical chemistry Pub Date : 2021-12-14 DOI: 10.17352/ojc.000027

Prashar Harsh

引用次数: 0

Chemical and physical stability of selected drugs for aerosol therapy with Sirmione thermal water 西米酮热水雾化治疗药物的化学和物理稳定性

Open journal of physical chemistry Pub Date : 2021-07-10 DOI: 10.17352/OJC.000026

Francesco Saverio Robustelli della Cuna, C. Sturani, Sarah Galfrè, L. Gervasio, C. Sottani, E. Grignani

引用次数: 0

Chiral Recognition of Dansyl Derivatives with an Amino Acid-Based Molecular Micelle: A Molecular Dynamics Investigation. 以氨基酸为基础的分子胶束手性识别丹酚衍生物:分子动力学研究。

Open journal of physical chemistry Pub Date : 2021-05-01 Epub Date: 2021-05-26 DOI: 10.4236/ojpc.2021.112004

Garcia Mauro, Nathan Black, Eugene Billiot, Fereshteh Billiot, Kevin F Morris, Yayin Fang

{"title":"Chiral Recognition of Dansyl Derivatives with an Amino Acid-Based Molecular Micelle: A Molecular Dynamics Investigation.","authors":"Garcia Mauro, Nathan Black, Eugene Billiot, Fereshteh Billiot, Kevin F Morris, Yayin Fang","doi":"10.4236/ojpc.2021.112004","DOIUrl":"https://doi.org/10.4236/ojpc.2021.112004","url":null,"abstract":"In this study, the chiral separation mechanisms of Dansyl amino acids, including Dansyl-Leucine (Dans-Leu), Dansyl-Norleucine (Dans-Nor), Dansyl-Tryptophan (Dans-Trp) and Dansyl-Phenylalanine (Dans-Phe) binding to poly-sodium N-undecanoyl-(L)-Leucylvalinate, poly(SULV), were investigated using molecular dynamics simulations. Micellar electrokinetic chromatography (MEKC) has previously shown that when separating the enantiomers of these aforementioned Dansyl amino acids, the L- enantiomers bind stronger to poly(SULV) than the D- enantiomers. This study aims to investigate the molecular interactions that govern chiral recognition in these systems using computational methods. This study reveals that the computationally-calculated binding free energy values for Dansyl enantiomers binding to poly(SULV) are in agreement with the enantiomeric order produced in experimental MEKC studies. The L- enantiomers of Dans-Leu, Dans-Nor, Dans-Trp, and Dans-Phe binding to their preferred binding pockets in poly(SULV) yielded binding free energy values of -21.8938, -22.1763, -21.3329 and -13.3349 kJ·mol-1, respectively. The D- enantiomers of Dans-Leu, Dans-Nor, Dans-Trp, and Dans-Phe binding to their preferred binding pockets in poly(SULV) yielded binding free energy values of -14.5811, -15.9457, -13.6408, and -12.0959 kJ·mol-1, respectively. Furthermore, hydrogen bonding analyses were used to investigate and elucidate the molecular interactions that govern chiral recognition in these molecular systems.","PeriodicalId":19563,"journal":{"name":"Open journal of physical chemistry","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8195262/pdf/nihms-1709197.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39089199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A proposal on a catalyst for the reaction methane + water => methanol + hydrogen 甲烷+水=>甲醇+氢反应催化剂的研究

Open journal of physical chemistry Pub Date : 2021-01-05 DOI: 10.17352/OJC.000022

R. Larsson

引用次数: 0

Equalization principles in open subsystems, origins of information descriptors and state-continuity relations 开放子系统的均衡原理，信息描述符的起源和状态连续性关系

Open journal of physical chemistry Pub Date : 2021-01-01 DOI: 10.17352/ojc.000023

Nalewajski Roman F

引用次数: 0