ChemistrySelect最新文献_第7页

CuO/Cu-MOF for Electrocatalytic CO Reduction to Acetate and Ethanol

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-28 DOI: 10.1002/slct.202405152

Yaping Liu, Yuting Sheng, Jian Jiang, Jian Song, Jingwei Li, Shaomin Zhu, Li Yan, Yunjie Ding

引用次数: 0

An Expedient Flow Chemistry Approach to Substituted 1,4-Dimethylcarbazoles

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-28 DOI: 10.1002/slct.202500249

Dr. Jennifer R Baker, Michael Hamilton, Dr. Cecilia C. Russell, Dr. Nicholas S O'Brien, Dr. Fiona M. Deane, Louis E Matheson, Prof. Adam McCluskey

引用次数: 0

Structural, Morphological, and Optical Characteristics of RF Sputtered Silicon Nitride: Role of Film Thickness and Post-Annealing Temperature

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-28 DOI: 10.1002/slct.202404474

Kalpana Chhoker, Dr. Divya Gupta, Dr. Umesh Kumar Dwivedi, Dr. Rahul Singhal, Prof. Sanjeev Aggarwal

{"title":"Structural, Morphological, and Optical Characteristics of RF Sputtered Silicon Nitride: Role of Film Thickness and Post-Annealing Temperature","authors":"Kalpana Chhoker, Dr. Divya Gupta, Dr. Umesh Kumar Dwivedi, Dr. Rahul Singhal, Prof. Sanjeev Aggarwal","doi":"10.1002/slct.202404474","DOIUrl":"https://doi.org/10.1002/slct.202404474","url":null,"abstract":"Silicon nitride (Si3N4) films are valued for their exceptional properties, making them a key focus in industrial and scientific research. Si3N4 films of thicknesses 200,400, 600 nm are deposited on Si substrate using radio-frequency (RF) sputtering and then annealed for one hour at temperatures of 1000 & 1200 °C in nitrogen atmosphere. The alterations in structural, morphological and optical characteristics are assessed. Raman Spectroscopy reveals nonlinear variation in Full width at half maximum (FWHM) of the Si3N4 peaks with annealing temperature and thickness reflecting changes in crystallinity of films. AFM analysis shows nonlinear roughness and particle size behavior with annealing temperature while linear trend with thickness. Field emission scanning electron microscopy (FESEM) reveals the uniformity of all films. Spectroscopic Ellipsometry (SE) reveals that refractive index shows a similar trend as FWHM with annealing temperatures and increases with an increase in film thickness. Films shows multiple optical energy gaps which may be attributed to the introduction of defects related states. Photoluminescence (PL) study confirms the presence of these defect related states in films. These findings underscore the tunability of Si3N4 film properties through precise control of annealing temperature and thickness, making them highly adaptable for wide applications including optoelectronics and protective coatings.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"10 13","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile Synthesis of Highly Active and Ultrastable Palladium Catalysts for Formaldehyde Oxidation

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-28 DOI: 10.1002/slct.202405669

Fen Wang, Zhongao Zhang, Jianjun Shi, Kai Zhang

{"title":"Facile Synthesis of Highly Active and Ultrastable Palladium Catalysts for Formaldehyde Oxidation","authors":"Fen Wang, Zhongao Zhang, Jianjun Shi, Kai Zhang","doi":"10.1002/slct.202405669","DOIUrl":"https://doi.org/10.1002/slct.202405669","url":null,"abstract":"Formaldehyde (HCHO), a common pollutant in industrial productions and indoor environments, poses health risks to humans. Thermal catalytic oxidation has been regarded as an effective approach to eliminate formaldehyde pollution due to its environmental benefits and operational convenience. In this study, a Pd-based catalyst with high dispersion of Pd was prepared by a facile impregnation method and choosing the appropriate calcination temperature of MgFe2O4 support, which demonstrated excellent activity and robustness during a long term test of 60 h conducted at 30 °C and WHSV of 30,000 mL/(g-h). A comprehensive set of characterizations, such as N2 physisorption, CO chemisorption, STEM, XRD, XPS, H2-TPR, O2-TPD, and CO2-TPD, were employed. The results revealed that the outstanding catalytic activity and stability resulted from the high dispersion of Pd, good oxygen mobility, strong antioxidant capacity of Pd, the low CO2 desorption temperature, and high CO2 desorption amount at low temperature. This study presents a palladium catalyst with significant industrial application potential in formaldehyde removal.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"10 13","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the Inhibitory Potential of Platinum(II) Curcumin Complex on Aβ (1–42) Peptide Aggregation: Insights from Simulation at 310 K

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-28 DOI: 10.1002/slct.202402892

Zeinab Rohani Sarvestani, Dr. Majid Hashemi, Prof. Mohammad Hadi Ghatee, Dr. Maryam Bahrami, Dr. Leila Sakhtemanian

{"title":"Evaluation of the Inhibitory Potential of Platinum(II) Curcumin Complex on Aβ (1–42) Peptide Aggregation: Insights from Simulation at 310 K","authors":"Zeinab Rohani Sarvestani, Dr. Majid Hashemi, Prof. Mohammad Hadi Ghatee, Dr. Maryam Bahrami, Dr. Leila Sakhtemanian","doi":"10.1002/slct.202402892","DOIUrl":"https://doi.org/10.1002/slct.202402892","url":null,"abstract":"Aberrant protein folding and amyloid aggregation is known as the main mechanism of fibrillation in amyloidosis diseases such as Alzheimer's disease. In this study, using computational techniques, we investigated the inhibitory effects of a platinum(II) curcumin complex on Aβ aggregation. Docking calculations showed that platinum(II) curcumin is a better binder to Aβ oligomer than curcumin itself. The molecular dynamics (MD) simulation was conducted to evaluate the possibility of the destabilization effect of platinum(II) curcumin on Aβ oligomers. The diversion of RMSD, RMSF, MSD, potential energy, and SASA trends indicate Aβ fibril instability in the presence of platinum(II) curcumin complex. The notable decline in the number of hydrogen bonds, salt bridges, and β-sheet content results in the conformational changes in the Aβ fibril structure and the reduction of its neurotoxicity. We believe that our results could help to elucidate the mechanisms of the antiaggregation effects of platinum(II) curcumin complex and provide a ground base for experimental antiaggregation research on this compound.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"10 13","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of Surface Functional Groups in Reactive Species Generation at the Water-Solid Interface Under Contact Electrification

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-26 DOI: 10.1002/slct.202500098

Qingyuan Song, Xinlei Tao, Ying Liang, Yunjun Mei, Dr. Fengjie Chen, Dr. Mengxi Cao, Prof. Pu Wang, Prof. Bolei Chen, Prof. Yawei Wang

{"title":"Role of Surface Functional Groups in Reactive Species Generation at the Water-Solid Interface Under Contact Electrification","authors":"Qingyuan Song, Xinlei Tao, Ying Liang, Yunjun Mei, Dr. Fengjie Chen, Dr. Mengxi Cao, Prof. Pu Wang, Prof. Bolei Chen, Prof. Yawei Wang","doi":"10.1002/slct.202500098","DOIUrl":"https://doi.org/10.1002/slct.202500098","url":null,"abstract":"Water-solid contact electrification (CE) is a common physical phenomenon. The electron transfer during water-solid CE can mediate the redox reactions at the interface, however, the effect of different surface functional groups on this physicochemical process and its mechanism are limited in understanding. Here, we have regulated the redox reactions caused by CE between water and florine-doped tin oxide (FTO) with various functional groups, as well as their electron transfer processes during the contact. It is revealed that the -COOH FTO sample has a larger work function than the no functional group FTO and -OH FTO samples and can easily accept electrons to promote electron transfer from water-solid heterojunctions in CE by density functional calculation. The nitrate reduction and nitrite oxidation experiments showed that the redox capacity of the water – FTO heterojunction with -COOH is much more than that of the water – FTO heterojunction with -OH or fewer functional groups in the CE process. The redox capacity of the water-FTO CE originates from reduction and oxidation species, which was confirmed by the electron transfer and active species detection analysis. These findings deepen our understanding of the correlation between surface functional groups and redox capacity in the CE process.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"10 12","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of l-Cysteine Inhibitor on the Electrochemical Properties of an Aluminum Alloy Anode Used for an Aluminum-Air Battery

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-26 DOI: 10.1002/slct.202405409

Lishuang Li, Lizi He, Ning Han, Yuqin Wang, Meiyang Wang, Cong Han

{"title":"Effects of l-Cysteine Inhibitor on the Electrochemical Properties of an Aluminum Alloy Anode Used for an Aluminum-Air Battery","authors":"Lishuang Li, Lizi He, Ning Han, Yuqin Wang, Meiyang Wang, Cong Han","doi":"10.1002/slct.202405409","DOIUrl":"https://doi.org/10.1002/slct.202405409","url":null,"abstract":"Serious self-corrosion and passivation film of Al-air battery reduces the actual energy density and limits its commercial application. The corrosion inhibition effect of l-cysteine on low-cost Al anode alloy and Al-air battery was studied using hydrogen evolution and electrochemical tests. The results show that l-cysteine can significantly reduce the corrosion current density of the Al electrode in 4 M KOH and improve the activity of the Al electrode. The optimum amount of inhibitor (0.5 M) improved the performance of the Al battery. The anode utilization efficiency reached 82.73%, and the battery life was prolonged by nearly three times. The cell capacity, energy, and maximum power density increased from 1990.67 mAh·g−1, 1672.16 Wh·kg−1, and 34.62 mW·cm−2 in the system without inhibitor to 2465.33 mAh·g−1, 2144.84 Wh·kg−1, and 64.4 mW·cm−2 in the system with 0.5 M l-cysteine. The researchers also used X-ray photoelectron spectroscopy (XPS) and other techniques combined with quantum chemistry calculation to obtain that ─COOH, ─NH2, ─SH in l-cysteine form physical adsorption films on Al surface, which improves the corrosion resistance of Al alloy anode.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"10 12","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Metronidazole-Loaded Carboxymethyl Cellulose-Based Hydrogel Using a Central Composite Design Method

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-26 DOI: 10.1002/slct.202405141

Dr. İlkay Konçe, Prof. Ebru Cubuk Demiralay, Dr. Yaşar Doğan Daldal

{"title":"Development of Metronidazole-Loaded Carboxymethyl Cellulose-Based Hydrogel Using a Central Composite Design Method","authors":"Dr. İlkay Konçe, Prof. Ebru Cubuk Demiralay, Dr. Yaşar Doğan Daldal","doi":"10.1002/slct.202405141","DOIUrl":"https://doi.org/10.1002/slct.202405141","url":null,"abstract":"This study aims to prepare a hydrogel based on sodium carboxymethyl cellulose (CMC). This hydrogel was prepared using citric acid to provide controlled release of the weak base metronidazole by forming an inclusion complex with 2-hydroxypropyl-β-cyclodextrin (HPβCD). A central composite design method was applied to determine the optimal variables for preparing a hydrogel of CMC, citric acid, polyethylene glycol-6000, and HPβCD. The hydrogel film was characterized in solid state by Fourier transform infrared spectrophotometer, scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, thermogravimetric analyses and evaluated in terms of swelling behavior, drug loading, and release. As a result of the evaluation made with the desirability function, the optimum condition was determined as 4.26% (w/v) CMC, 0.150% (w/v) citric acid, 1.33% (w/v) PEG-6000, and 1.60% (w/v) HPβCD with the experimental design according to the % swelling values at the 60th min. The in vitro release of the model drug metronidazole loaded into the hydrogel synthesized by the reverse phase liquid chromatography method was calculated as 73.42% ± 0.23%. The hydrogel prepared in this study has been shown to have the potential to be a suitable carrier for metronidazole.","PeriodicalId":146,"journal":{"name":"ChemistrySelect","volume":"10 12","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green and Efficient One-Pot Synthesis of 1,3-Diaryl-3-arylamino-propan-1-one Derivatives Using Thiamine Hydrochloride as a Catalyst

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-26 DOI: 10.1002/slct.202405766

Dhiraj D. Pawar, Aniket N. Timble, Mayuri B. Thorat, Krantisagar S. More, Yatin U. Gadkari

引用次数: 0

Advances in Metal-Organic Frameworks for Use in 3D Printing Techniques

IF 1.9 4区化学

ChemistrySelect Pub Date : 2025-03-26 DOI: 10.1002/slct.202404898

Rohan Bhosale, Shruti Gupta, Balasubramanian Kandasubramanian

引用次数: 0