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Validation and Mechanistic Studies of the Headspace Effect in MOF Synthesis

Angewandte Chemie 2025年第12期137卷

作者： Julia C. Donovan Keenan R. Wright Adam J. Matzger Department of Chemistry Institution University of Michigan Address 930 North University Avenue Ann Arbor Michigan 48109-1055 United States Charles G. Overberger Collegiate Professor of Chemistry and Macromolecular Science & Engineering Department of Chemistry and Macromolecular Science and Engineering Program Institution University of Michigan Address 930 North University Avenue Ann Arbor Michigan 48109-1055 United States

The influence of headspace volume and composition on metal–organic framework (MOF) synthesis has been largely overlooked with no mechanisms currently invoking these factors. Herein, we reveal that an increased volume of oxygen in the headspace during the synthesis of zinc carboxylate-based MOFs (MOF-5, MOF-177, and IRMOF-8) as well as UiO-66 and ZJU-28 accelerates crystal formation. Investigation into the underlying mechanism of this phenomenon elucidates the critical roles played by all reagents, and some of their byproducts, in MOF synthesis. These insights are the key to developing more efficient and sustainable synthetic strategies for MOF production.

关键词： crystal growth formamide nitrosamine nucleation Raman spectroscopy

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Detection of features from the internet of things customer attitudes in the hotel industry using a deep neural network model

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Measurement: Sensors 2022年 22卷

作者： Rajesh, Sudha Abd Algani, Yousef Methkal Al Ansari, Mohammed Saleh Balachander, Bhuvaneswari Raj, Roop Muda, Iskandar Kiran Bala, B. Balaji, S. Dept. of Computational Intelligence College of Engineering and Technology School of Computing SRMIST Kattankulathur Chennai India Department of Mathematics Sakhnin College Israel College of Engineering Department of Chemical Engineering University of Bahrain Bahrain Department of ECE Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Chennai602105 India Lecturer in Economics Education Department Government of Haryana Haryana Panchkula India Department of Doctoral Program Faculty Economic and Business Universitas Sumatera Utara 20222 Jl. Prof TM Hanafiah 12 USU Campus Padang bulan Medan20155 Indonesia Department of Artificial Intelligence and Data Science K.Ramakrishnan College of Engineering Tamil Nadu Trichy India Department of CSE Panimalar Engineering College Chennai India Department of Mathematics The Arab Academic College for Education in Israel-Haifa Israel

Tourism and the hotel business have benefited greatly from the use of digital social networking. Using social big data research, the application of deep learning seems to have been beneficial in a marketing strategies and customer preference estimate. Recognizing human psychology, which is critical to industrial success, has benefited greatly from digital technology and social media. The Internet of Things (IoT) provides a chance for a hotel sector to improve the customer experience although lowering operational expenses. The ratings are determined by the following factors: Value, Apartment, Location, Hygiene, Front Office, Facilities, Professional Service, Internet, and Parking. Traditional techniques which anticipate hotel evaluations through minimal precision add difficulty to the rating assessment. As a result, efficient deep learning algorithms are employed to evaluate reviews designed to help consumers in selecting better hotels. To predict qualities, multiple classification techniques, including convolutional neural network-based deep learning (CNN-DL) and support vector machine (SVM) network-based deep learning, were used in this research. The system examines system efficiency by using the TripAdvisor website, this is a well American database. The research results reveal that the CNN-DL method outperforms another method in terms of classification efficiency and failure *** graphical results could also be utilized to enhance the effectiveness of the suggested model and offer insights into response tactics, demonstrating the study's academic and conceptual achievements. Although it is feasible to conclude from such research that the possibility of IoT within the hotel industry has not yet been fully investigated, as researchers commonly speculate on using IoT for implementations that might quickly be of involvement to a hotel sector, but refuse to recognize that possibility as a massive market. © 2022 The Author(s)

关键词： Hotels

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Heavy Atom Oriented Orbital Angular Momentum Manipulation in Metal-Free Organic Phosphors

Research Square

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Research Square 2021年

作者： Shao, Wenhao Jiang, Hanjie Zimmerman, Paul M. Kim, Jinsang Department of Chemistry University of Michigan Ann ArborMI48109 United States Macromolecular Science and Engineering University of Michigan Ann ArborMI48109 United States Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Department of Chemical Engineering University of Michigan Ann ArborMI48109 United States

Metal-free purely organic phosphors (POPs) are emerging materials for display technologies, solid-state lighting, and chemical sensors. The past decade has seen the promising utility of the El-Sayed rule and heavy atom effects in the design of POPs, and efficient matrix engineering to boost emission efficiencies. However, due to limited contemporary design strategies, the intrinsic spin-orbit coupling (SOC) efficiency of POPs remains low and their emission lifetime is pinned in the millisecond-second regime. Here, we report a universally applicable methodology to synergistically manipulate the main descriptors in SOC - heavy atom effect and orbital angular momentum, assisted by a novel set of natural-transition-orbital-based computation methods to visualize angular momentum descriptors in molecular design. Prototype POPs with efficient room-temperature phosphorescence were designed with SOC efficiencies boosted beyond 102 cm-1 and lifetime pushed below the millisecond regime. Experimental verification for our novel design rule was conducted through systematic computation-assisted design achieving discrete tuning of heavy atom effects and orbital angular momentum. © 2021, CC BY.

关键词： Efficiency

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Cold atmospheric plasma-enabled platelet vesicle incorporated iron oxide nano-propellers for thrombolysis

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Materials Today Bio 2023年 23卷 100876页

作者： Jheng, Pei-Ru Chiang, Chia-Che Kang, Jiunn-Horng Fan, Yu-Jui Wu, Kevin C.-W. Chen, Yan-Ting Liang, Jia-Wei Bolouki, Nima Lee, Jyh-Wei Hsieh, Jang-Hsing Chuang, Er-Yuan Graduate Institute of Nanomedicine and Medical Engineering Graduate Institute of Biomedical Materials and Tissue Engineering Institute of Biomedical Optomechatronics International Ph.D. Program in Biomedical Engineering School of Biomedical Engineering College of Biomedical Engineering Professional Master Program in Artificial Intelligence in Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan Department of Physical Medicine and Rehabilitation Taipei Medical University Hospital Taipei Taiwan Institute of Biomedical Engineering & Nanomedicine National Health Research Institute Keyan Road Zhunan Miaoli City350 Taiwan Department of Chemical Engineering National Taiwan University No.1 Sec. 4 Roosevelt Rd Taipei10617 Taiwan Department of Plasma Physics and Technology Faculty of Science Masaryk University Brno Czech Republic Center for Plasma and Thin Film Technologies Ming Chi University of Technology New Taipei City Taiwan Department of Materials Engineering Ming Chi University of Technology New Taipei City Taiwan Cell Physiology and Molecular Image Research Center Taipei Medical University-Wan Fang Hospital Taipei11696 Taiwan

A new approach to treating vascular blockages has been developed to overcome the limitations of current thrombolytic therapies. This approach involves biosafety and multimodal plasma-derived theranostic platelet vesicle incorporating iron oxide constructed nano-propellers platformed technology that possesses fluorescent and magnetic features and manifold thrombus targeting modes. The platform is capable of being guided and visualized remotely to specifically target thrombi, and it can be activated using near-infrared phototherapy along with an actuated magnet for magnetotherapy. In a murine model of thrombus lesion, this proposed multimodal approach showed an approximately 80 % reduction in thrombus residues. Moreover, the new strategy not only improves thrombolysis but also boosts the rate of lysis, making it a promising candidate for time-sensitive thrombolytic therapy. © 2023 The Authors

关键词： Infrared devices

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Effect of replacing a synthetic antioxidant for natural extract of yerba mate (Ilex paraguariensis) on the physicochemical characteristics, sensory properties, and gastrointestinal digestion in vitro of burgers

Food Chemistry Advances

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Food Chemistry Advances 2022年 1卷

作者： Feihrmann, Andresa Carla Coutinho, Fernando Henrique dos Santos, Iza Catarini de Marins, Annecler Rech de Campos, Talita Aparecida Ferreira da Silva, Natallya Marques Duarte, Vitor Anthony Matiucci, Marcos Antônio de Souza, Maria Luiza Rodrigues Gomes, Raquel Guttierres Postgraduate Program in Food Science Maringa State University Maringa CEP: 87020-900 Brazil Department of Food Engineering Maringa State University PR Maringa CEP: 87020-900 Brazil Postgraduate Program in Food Engineering Maringa State University PR Maringa CEP: 87020-900 Brazil Postgraduate Program in Chemical Engineering- Maringa State University PR Maringa CEP: 87020-900 Brazil Postgraduate Program in Animal Science Maringa State University PR Maringa CEP: 87020-900 Brazil

The effect of replacing a synthetic antioxidant with a natural extract of yerba mate (Ilex paraguariensis) in frozen burgers stored for 60 days was evaluated. FTIR and GC/MS analyses confirmed the presence of phenolic compounds in the extract. Three treatments were made, consisting of the Control (sodium erythorbate), treatment 250YM with 250 mg/kg of yerba mate extract, and 500YM with 500 mg/kg yerba mate extract. The pH values of the treatments with yerba mate were different from the Control, while a_w, color parameters, and the microbiological characterization were not affected. On day 60 of storage, the Control presented an average TBARS level of 0.187, while the treatments 250YM and 500YM presented 0.176 and 0.172, respectively. An increase in phenolic compounds and DPPH values was observed for the treatments 250YM and 500YM during the digestion in vitro. The samples were well accepted by the sensory panel with scores between 7 and 8.6. Therefore, replacing the synthetic antioxidant with yerba mate extract in burgers may be a healthier alternative. © 2022

关键词： Digestion In vitro DPPH FTIR GC/MS

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Novel furfural-complexed approach to synthesizing carbon-Doped ZnO with breakthrough photocatalytic efficacy

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Journal of Advanced Research 2024年

作者： Ali Ansari, Sajid Parveen, Nazish Aljaafari, Abdullah Alshoaibi, Adil Alsulaim, Ghayah M. Waqas Alam, Mir Zahid Ansari, Mohd Department of Physics College of Science King Faisal University P.O. Box 400 Al-Ahsa Hofuf 31982 Saudi Arabia Department of Chemistry College of Science King Faisal University P.O. Box 380 Al-Ahsa Hofuf 31982 Saudi Arabia Chemical Engineering Program Texas A&M University at Qatar P.O. Box 23874 Doha Qatar

Introduction: The efficiency of zinc oxide (ZnO) nanoparticles for environmental decontamination is limited by their reliance on ultraviolet (UV) light and rapid charge carrier recombination. Carbon doping has been proposed to address these challenges by potentially enhancing visible light absorption and charge separation. Objectives: This study aims to introduce a novel, single-step synthesis method for carbon-doped ZnO (C-Z) nanoparticles, leveraging the decomposition of zinc nitrate hexahydrate and furfural under a nitrogen atmosphere to improve photocatalytic activity under visible light. Methods: A series of C-Z variants (C-Z-1 to C-Z-5) and an undoped sample (ZnO-0) were synthesized. The influence of furfural on the synthesis process and doping mechanism was analyzed by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and UV–visible diffuse reflectance spectroscopy (DRS). Results: XPS confirmed the integration of carbon within the ZnO matrix, and XRD indicated increased lattice dimensions owing to doping. DRS revealed bandgap narrowing, suggesting enhanced charge separation. Among the variants, C-Z-3 significantly outperformed the others, showing a 12-fold increase in the photocatalytic degradation rate of Rhodamine B compared to undoped ZnO. Conclusion: The developed single-step synthesis method for C-Z nanoparticles represents a major advancement in materials engineering for ecological applications. The enhanced photocatalytic activity under visible light, as demonstrated by C-Z-3, underscores the potential of these nanoparticles for environmental decontamination. © 2024

关键词： C-ZnO Dye degradation Furfural, Visible light Photocatalysis

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Antibacterial activity of functionalized natural zeolites (NZ-AgNPs) and its application in bacteriological water treatment and commercial paints

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Environmental Nanotechnology, Monitoring and Management 2024年 22卷

作者： Ribeiro, Anna Carla de Oliveira, Alessandra Marjorie Beltran, Laiza Bergamasco Diório, Alexandre Magalhães-Ghiotto, Grace Anne Vieira de Abreu Filho, Benício Alves de Almeida Duarte, Elizabeth da Costa Neves Fernandes Bergamasco, Rosângela State University of Maringá Department of Biotechnology Genetics and Cell Biology Paraná Maringá Brazil State University of Maringá Graduate Program in Food Science Paraná Maringá 87020-900 Brazil State University of Maringá Department of Chemical Engineering Paraná Maringá 87020-900 Brazil Linking Landscape Environment Agriculture and Food School of Agriculture – University of Lisbon Lisbon Portugal

Developing advanced materials with efficient antibacterial properties to guarantee human health protection is urgent. This study aimed to evaluate the antibacterial performance of natural zeolite (NZ) functionalized with silver nanoparticles (Ag NPs), obtained from a green reducing method using Moringa oleifera seed extract (NZ-AgNPs), against a Gram-negative bacteria, namely Escherichia coli (E. coli). Moreover, two applications were tested: bacteria adsorption for water treatment, namely Escherichia coli, and its incorporation in commercial paints. The proposed modifications were confirmed by advanced characterization techniques (TEM, SEM, EDX, FTIR, XRD, and ZP). The antibacterial activity assay was conducted using minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The results demonstrated the advantages of using an inorganic support for carrying biocidal agents. The required amount of Ag NPs, when it was supported onto NZ (NZ-AgNPs), was four times less to exhibit the bactericidal effect against Escherichia coli than Ag NPs on their own since they had the same MBC value (1.56 mg ml⁻¹). The observed adsorption behavior corroborates such findings and demonstrates that 0.01 g of the proposed composite achieved 100 % of E. coli removal and 9.85 log reduction. Regarding commercial paint experiments, the NZ-AgNPs successfully demonstrated the potential to inhibit bacterial growth with an inhibition zone (IZ) of 41 mm. Using inorganic carriers, as NZ, for controlling the biocidal compound release can bring economic and environmental advantages because zeolite is a natural material and the saved amount of biocidal agent, namely Ag NPs, are desirable features of a new antibacterial additive's generation. © 2024

关键词： Antibacterial agents Clinoptilolite Nanotechnology Paints Water treatment

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Kombucha benefits, risks and regulatory frameworks: A review

Food Chemistry Advances

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Food Chemistry Advances 2023年 2卷

作者： de Oliveira, Patricia Viera da Silva Júnior, Afonso Henrique de Oliveira, Carlos Rafael Silva Assumpção, Carolina Fagundes Ogeda, Cláudia Hernandes Specialization program of Innovation and Technology for Food and Beverages UERGS State University of Rio Grande do Sul RS Caxias do Sul Brazil Department of Chemical Engineering and Food Engineering Federal University of Santa Catarina SC Florianópolis Brazil Department of Textile Engineering Federal University of Santa Catarina SC Blumenau Brazil Institute of Food Science and Technology UFRGS Federal University of Rio Grande do Sul RS Bento Gonçalves Brazil

The growing demand for functional and healthy drinks has attracted consumers' attention. In this scenario, kombucha stands out as a fermented tea which has several health benefits due to its antioxidant, anticarcinogenic, anti-inflammatory, antidiabetic, and anti-bacterial properties, among others. However, few studies present the potential risks associated with the consumption of this beverage. In addition, the need for global regulatory frameworks is an obstacle to the production and standardization of the product. Given this, the present review focuses addresses kombucha's benefits, risks, and regulatory frameworks. © 2023 The Authors

关键词： Consumption risks Functional beverage Health benefits Kombucha Regulation

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Enabling "lithium-free" manufacturing of pure lithium metal solid-state batteries through in situ plating (Oct, 10.1038/s41467-020-19004-4, 2020)

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NATURE COMMUNICATIONS 2020年第1期11卷 5201-5201页

作者： Wang, Michael J. Carmona, Eric Gupta, Arushi Albertus, Paul Sakamoto, Jeff Department of Materials Science and Engineering University of Michigan Ann Arbor USA Department of Chemical and Biomolecular Engineering University of Maryland College Park USA Department of Macromolecular Science and Engineering University of Michigan Ann Arbor USA Department of Chemical and Biomolecular Engineering University of Maryland College Park USA Department of Materials Science and Engineering University of Michigan Ann Arbor USA

The coupling of solid-state electrolytes with a Li-metal anode and state-of-the-art (SOA) cathode materials is a promising path to develop inherently safe batteries with high energy density (>1000 Wh L−1). However, integrating metallic Li with solid-electrolytes using scalable processes is not only challenging, but also adds extraneous volume since SOA cathodes are fully lithiated. Here we show the potential for “Li-free” battery manufacturing using the Li7La3Zr2O12 (LLZO) electrolyte. We demonstrate that Li-metal anodes >20 μm can be electroplated onto a current collector in situ without LLZO degradation and we propose a model to relate electrochemical and nucleation behavior. A full cell consisting of in situ formed Li, LLZO, and NCA is demonstrated, which exhibits stable cycling over 50 cycles with high Coulombic efficiencies. These findings demonstrate the viability of “Li-free” configurations using LLZO which may guide the design and manufacturing of high energy density solid-state batteries.

关键词： Batteries Nanoscale materials

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Characterization of Fluorinated Polyimide Films

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MRS Online Proceedings Library 2020年第1期264卷 263-268页

作者： Pradnya V. Nagarkar Jiong Ping Lu David Volfson Klavs F. Jensen Stephen D. Senturia Electronics Packaging Program and Department of Materials Science & Engineering Massachusetts Institute of Technology Cambridge Electronics Packaging Program and Department of Chemical Engineering Massachusetts Institute of Technology Cambridge Electronics Packaging Program and Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge

X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) have been used to characterize the polyimide film based on 4,4′ hexafluoro-isopropylidene -bis pthalic anhydride (HFDA) and 4,4′ -bis (4-aminophenoxy) biphenyl (APBP). Films of varying thicknesses made from diluted precursors were studied by IR and XPS. An elemental analysis and a tentative peak assignment for C 1s in XPS is presented. The HFDA-APBP thick films are stoichiometric in composition and binding energies are in good agreement with data on hexafluorodianhydride-oxydianiline (HFDA-ODA). For thinner films, certain chemical modifications were observed at high cure temperatures.

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