ChemistryOpen最新文献_第8页

ZIF-Co3O4@ZIF-Derived Urchin-Like Hierarchically Porous Carbon as Efficient Bifunctional Oxygen Electrocatalysts ZIF-Co3O4@ZIF 衍生的海胆状分层多孔碳作为高效双功能氧电催化剂。

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-06-10 DOI: 10.1002/open.202400057

Lingling Zhang, Xia Wang, Chong Gong, Weiyan Sun, Zihan Lu

{"title":"ZIF-Co3O4@ZIF-Derived Urchin-Like Hierarchically Porous Carbon as Efficient Bifunctional Oxygen Electrocatalysts","authors":"Lingling Zhang, Xia Wang, Chong Gong, Weiyan Sun, Zihan Lu","doi":"10.1002/open.202400057","DOIUrl":"10.1002/open.202400057","url":null,"abstract":"Co3O4 nanoparticles were sandwiched into interlayers between ZIF-8 and ZIF-67 to form ZIF-Co3O4@ZIF precursors. Pyrolysis of ZIF-Co3O4@ZIF yielded an urchin-like hierarchically porous carbon (Co@CNT/NC), the thorns of which were carbon nanotubes embedded Co nanoparticles. With large specific surface area and hierarchically porous structure, as-prepared Co@CNT/NC exhibited excellent bifunctional oxygen electrocatalytic performances. It has good ORR performance with E1/2 of 0.85 V, which exceeds the Pt/C half-wave potential (E1/2=0.83 V). In addition, Co@CNT/NC has an OER performance close to that of RuO2. To further demonstrate the effect of Co modifying on the properties, the samples were subjected to acid washing treatment. Co-based nanoparticles were proved to After acid washing, there was obvious loss of Co particles in Co@CNT/NC, resulting in poor oxygen electrocatalysis. So, the pyrolysis products of ZIF-8-Co3O4@ZIF-67 retained large specific surface area and porous structure can be retained, and on the other hand, the carbon tube structure and original polyhedron framework. Besides, existence of Co nanoparticle@carbon nanotube provided more active sites and improved the ORR and OER performances.","PeriodicalId":9831,"journal":{"name":"ChemistryOpen","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/open.202400057","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141295649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-Step Synthesis of Chitosan Hydrogel as Electrochemical Chemosensor for Hydrogen Sulfide Detection in Pregnancy-Induced Hypertension Syndrome Serum Sample 一步合成壳聚糖水凝胶作为电化学传感器检测妊娠高血压综合征血清样本中的硫化氢

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-06-04 DOI: 10.1002/open.202400107

Lishan Fang, Jinqiu Li, Wei Lin, Lili Zeng, Liumin Yu, Zhanfei Chen, Jianlin Shen, Yu Chen, Zhonghui Chen, Zhenyu Lin

{"title":"One-Step Synthesis of Chitosan Hydrogel as Electrochemical Chemosensor for Hydrogen Sulfide Detection in Pregnancy-Induced Hypertension Syndrome Serum Sample","authors":"Lishan Fang, Jinqiu Li, Wei Lin, Lili Zeng, Liumin Yu, Zhanfei Chen, Jianlin Shen, Yu Chen, Zhonghui Chen, Zhenyu Lin","doi":"10.1002/open.202400107","DOIUrl":"10.1002/open.202400107","url":null,"abstract":"Oxidative stress caused by pregnancy-induced hypertension syndrome significantly affects the health of pregnant women. Hydrogen sulfide is a typical gaseous signal molecule against oxidative stress, and it is of profound significance to develop a detection method. In this study, a stimuli-responsive hydrogel was constructed based on the coordination and bonding principle of metal ions and chitosan (CS) to realize the quantitative detection of hydrogen sulfide (H2S). The chain of CS contains a large number of amino groups and hydroxyl groups, which can form the coordination structure with Cu2+, triggering CS to form a stable hydrogel. The hydrogel can be formed within about 5 s, which has the characteristics of rapid preparation. In the presence of target H2S, the cross-linking agent Cu2+ in the hydrogel can compete out, resulting in the collapse of the hydrogel and the release of the electrochemical probe. By detecting the concentration of the released electrochemical probe, the quantitative detection of H2S can be achieved. The prepared hydrogel has a good linear relationship with the concentration of H2S from 1 μM to 60 μm. At the same time, the hydrogel has good specificity and stability, and it can be applied to the detection of H2S in serum samples.","PeriodicalId":9831,"journal":{"name":"ChemistryOpen","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/open.202400107","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141257735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced HPLC Method for Boar Taint Quantification 增强型高效液相色谱法用于野猪肉污点定量。

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-05-29 DOI: 10.1002/open.202300283

R. Pereira-Pinto, M. Barros, M. Vaz-Velho, F. Mata, P. Pires

{"title":"Enhanced HPLC Method for Boar Taint Quantification","authors":"R. Pereira-Pinto, M. Barros, M. Vaz-Velho, F. Mata, P. Pires","doi":"10.1002/open.202300283","DOIUrl":"10.1002/open.202300283","url":null,"abstract":"Boar taint is an unpleasant odour found in the carcasses of entire male pigs, resulting from androstenone and skatole accumulation during pubertal development, and impacting pork quality. This study proposes the validation of an adapted chromatographic method for quantifying skatole and androstenone in the pigs’ liquid fat using fluorescence detection. A good chromatographic separation was achieved, with skatole (SKA) and androstenone (AND) elution at 4.4 and 9.9 min., respectively. An external calibration method was applied, with calibration curves correlation coefficient of 0.9999 for both analytes. Detection limit values were 1.53 and 16.02 ng/g for SKA and AND, respectively. SKA recovery was 99.72±2.34 % (2.34 % RSD) and 102.84±1.62 % (1.57 % RSD) for AND. Results showed good precision values (repeatability <2.46 % RSD for SKA, <6.85 % RSD for AND; intermediate precision <2.87 % RSD for SKA, <6.98 % RSD for AND). The method‘s robustness was tested and the values were within the reference ranges. The validation results proved that the adaptation of an existing method resulted in good assessments of robustness, reliability and accuracy.","PeriodicalId":9831,"journal":{"name":"ChemistryOpen","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/open.202300283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141160735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave Effect in Hydrolysis of Levoglucosan with a Solid Acid Catalyst for Pyrolysis-Based Cellulose Saccharification 用固体酸催化剂水解左旋葡聚糖中的微波效应，用于基于热解的纤维素糖化。

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-05-29 DOI: 10.1002/open.202300311

Dr. Takashi Nomura, Prof. Eiji Minami, Prof. Haruo Kawamoto

引用次数: 0

Approach to the Core Structure of Signermycin B 探寻 Signermycin B 的核心结构。

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-05-29 DOI: 10.1002/open.202400103

Dr. Khoa Linh Pham, Prof. Dr. Martin E. Maier

引用次数: 0

Characteristics of Aqueous Chemical Species Generation in Plasma-Facing Liquid Systems Using Helium Jet Plasma 使用氦气喷射等离子体在等离子体面向液体系统中生成水性化学物质的特征。

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-05-27 DOI: 10.1002/open.202300213

Joo Young Park, Jin Hee Bae, Seunghun Lee

{"title":"Characteristics of Aqueous Chemical Species Generation in Plasma-Facing Liquid Systems Using Helium Jet Plasma","authors":"Joo Young Park, Jin Hee Bae, Seunghun Lee","doi":"10.1002/open.202300213","DOIUrl":"10.1002/open.202300213","url":null,"abstract":"Plasma-facing liquids (PFLs) facilitate the storage of reactive O and N species (RONS), including H2O2 and NO2−, which remain in the PFL after plasma treatment, and they can continuously influence the target immersed in the liquid. However, their behaviors and levels of generation and extinction depend strongly on the plasma characteristics and liquid condition. Therefore, understanding the effects of the liquid type on the plasma discharge characteristics and the RONS generated via plasma discharge is necessary. We compared the RONS generation and storage trends of deionized H2O and a high-conductivity PFL, RPMI 1640, which is a well-known cell culture medium commonly used to culture mammalian cells. RPMI 1640 acted as an electrode and enhanced the plasma discharge power by supplying abundant radicals and RONS. The production of gaseous hydroxyl radicals and NO markedly increased, which facilitated H2O2 and NO2− production in the PFL for the first 200 s, and then the increase in the RONS concentration stagnated. With respect to storage, as the components within RMPI 1640 exhibited high reaction constants for their reactions with H2O2, H2O2 elimination was completed in <30 min. Unlike H2O2, the concentration of NO2− in the PFL was unchanged.","PeriodicalId":9831,"journal":{"name":"ChemistryOpen","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11230930/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141154614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Concise Synthesis of (−)-Ambrox (-)-Ambrox 的简明合成。

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-05-22 DOI: 10.1002/open.202400006

Bingyang Wang, Yanhui Liu, Chenyang Jia, Zhenfang Lan, Xuepeng Yang

引用次数: 0

2,3-Epoxyamide-alcohols in Domino Reactions: En Route to Molecular Diversity 多米诺反应中的 2,3-环氧酰胺醇：分子多样性之路。

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-05-16 DOI: 10.1002/open.202400115

Dr. Abderrahman El Bouakher, Dr. Jérôme Lhoste, Prof. Arnaud Martel, Dr. Sébastien Comesse

引用次数: 0

Solventless Synthesis of Zinc Sulphide Nanoparticles from Zinc Bis(diethyldithiocarbamate) as a Single Source Precursor 以双(二乙基二硫代氨基甲酸锌)为单源前驱体无溶剂合成纳米硫化锌。

IF 2.3 4区化学

ChemistryOpen Pub Date : 2024-05-16 DOI: 10.1002/open.202400050

Dr. Selina Ama Saah, Patrick Opare Sakyi, Prof. Nathaniel Owusu Boadi, Franklyn Addai Tieku, Ampem Kwabena Boampong

{"title":"Solventless Synthesis of Zinc Sulphide Nanoparticles from Zinc Bis(diethyldithiocarbamate) as a Single Source Precursor","authors":"Dr. Selina Ama Saah, Patrick Opare Sakyi, Prof. Nathaniel Owusu Boadi, Franklyn Addai Tieku, Ampem Kwabena Boampong","doi":"10.1002/open.202400050","DOIUrl":"10.1002/open.202400050","url":null,"abstract":"This study explores the synthesis of nanoparticles through the thermal decomposition of single-source precursors, a method gaining popularity due to its low cost, minimal environmental toxicity, rapidity, scalability, and the ability to form nanoparticles with few defects. Zinc ethyl carbamate was synthesized and characterized using 1H NMR and infrared spectroscopy. Its purity was confirmed through microelemental analysis and melting point determination. The melting point of the complex was determined to be 165 °C. The thermogravimetric analyses indicated a one-step decomposition of zinc ethyl carbamate with a decomposition onset of of 200 °C, yielding a stable ZnS residue. Further thermal decomposition led to the formation of wurtzite phase ZnS nanoparticles, as evidenced by XRD. SEM micrographs displayed mixed spherical, and cubic unevenly sized, polydispersed nanoparticles, while EDX revealed approximately a 1 : 1 Zn to S ratio. Estimated band gap from the Tauc's plot gave 3.93 eV and 3.42 eV for the nanoparticles synthesized at 300 and 400 °C respectively. The wide difference in the band gaps may be as a result of the larger particles observed at 400 °C and the deformations in the sample as observed in the SEM.","PeriodicalId":9831,"journal":{"name":"ChemistryOpen","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/open.202400050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140944167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

C5 Pentacle Structures: A Localization-Delocalization Matrices Approach C5 五角星结构：定位-去定位矩阵法

IF 2.5 4区化学

ChemistryOpen Pub Date : 2024-05-16 DOI: 10.1002/open.202300277

Dr. Julien Pilmé, Dr. Riccardo Spezia

{"title":"C5 Pentacle Structures: A Localization-Delocalization Matrices Approach","authors":"Dr. Julien Pilmé, Dr. Riccardo Spezia","doi":"10.1002/open.202300277","DOIUrl":"10.1002/open.202300277","url":null,"abstract":"This article explores the possible presence of a pentacle valence bond structure in C<math></math>\u0000 cyclic molecules. At this end, we have used quantum chemistry tools to elucidate the possible arrangement and the nature of chemical bonds within linear, cyclic, and three-dimensional structures only formed by five carbon atoms. While the linear structure is clearly the most stable one, local minima were obtained for both bi- and three-dimensional structures. Using the localization-delocalization matrices approach, we characterize both the minimum linear structure and the cyclic ones. Interestingly, the linear structure is a combination of ionic and covalent bonds, albeit the four distances are almost identical, when using Density Functional Theory. For cyclic C<math></math>\u0000, the pentacle bonding arrangement emerges as a significant Lewis structure, indicative of an unusual formal configuration characterized by five intersecting C−C bonds. Our calculations show that this pentacle arrangement in cyclic C<math></math>\u0000 scheme is also present in the more known cyclo-pentadienyl molecule.","PeriodicalId":9831,"journal":{"name":"ChemistryOpen","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/open.202300277","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140944165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0