Article
Chemistry, Physical
Dong Yang, Saumil Chheda, Yinghui Lyu, Ziang Li, Yue Xiao, J. Ilia Siepmann, Laura Gagliardi, Bruce C. Gates
Summary: Metal-organic frameworks (MOFs) with metal oxide cluster nodes have well-defined structures that can be used to study catalytic reactions. This study investigates the catalytic performance and mechanism of methanol dehydration on the Al8O12 nodes of MOF CAU-1 using experimental and density functional theory (DFT) methods. The results reveal that the reactivity of node mu(2)-OH groups, influenced by the coordination environments of the node aluminum atoms, plays a crucial role in the formation of catalytic sites and the dehydration mechanism.
Review
Chemistry, Applied
Cairong Wang, Ge Qiu, Chen Li, Kai Sun, Zhichuan Wang, Xin Wang
Summary: Carboxylic acid compounds are important structural units that exist widely in nature, and decarboxylative reactions have great significance in synthetic chemistry due to the non-flammable, non-toxic, and easy-to-remove byproduct carbon dioxide. Heterocyclic compounds are important backbones of various biologically active molecules, making research on new synthetic tactics for heterocyclic derivatives based on decarboxylative cyclization of great interest.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Food Science & Technology
Chang-Cheng Zhao, Kashif Ameer, Jong-Bang Eun
Summary: This study evaluated drying kinetics, effective diffusivity, and activation energy of sliced persimmon during hot air drying at different temperatures. Results showed that the drying process followed a second-order kinetic model, with a decrease in bioactive compounds at higher temperatures. Additionally, no significant differences in drying rate were observed after a certain drying time at different temperatures.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Sergey Vyazovkin, Nikita Muravyev
Summary: Many publications in Biomass Conversion and Biorefinery have recently addressed the use of single heating rate methods in pyrolysis data analysis, highlighting their limitations in determining reliable kinetic parameters. The reasons and examples of the failure are briefly discussed and emphasized. The International Confederation for Thermal Analysis and Calorimetry recommends the use of methods employing multiple heating rates for accurate kinetic analyses.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Multidisciplinary
Jesus G. Ovejero, Maria del Puerto Morales, Sabino Veintemillas-Verdaguer
Summary: The search for competitive processes and products using environmentally friendly chemistry is a significant challenge in materials science. This study explores the influence of magnetic inductive heating on the synthesis of magnetic iron oxide nanoparticles in water. The findings suggest that the heating method affects the growth and formation of the nanoparticles, and indicate the possibility of expanding the size range of nanomaterials.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Organic
Ihor Kleban, Yevhen Krokhmaliuk, Sofiia Reuti, Serhii Shuvakin, Vyacheslav V. Pendyukh, Oleksandr Khyzhan, Dmytro S. Yarmoliuk, Andriy Tymtsunik, Yuliya Rassukana, Oleksandr O. Grygorenko
Summary: An approach to synthesize oxa- and azabicyclo[n.1.0]alkan-1-yl trifluoroborates on a multigram scale was developed, with two synthetic strategies evaluated. The second method, relying on regioselective hydroboration of appropriate enynes, was found to be more efficient in terms of scalability and substrate scope. Further steps included ring closing-metathesis, palladium-catalyzed cyclopropanation, and reaction with KHF(2), resulting in the title compounds in up to 50 g scale in a single run.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Susan E. Henkelis, Dayton J. Vogel, Peter C. Metz, Nichole R. Valdez, Mark A. Rodriguez, David X. Rademacher, Stephen Purdy, Stephen J. Percival, Jessica M. Rimsza, Katharine Page, Tina M. Nenoff
Summary: A series of rare earth metal-organic frameworks were explored for the selective adsorption of caustic acid gas species, revealing structural distortions under different reaction conditions and the impact of lanthanide ionic radii contraction on MOF structures; Scanning electron microscopy-energy-dispersive spectroscopy and neutron diffraction studies were used to investigate crystal growth stages of the RE-DOBDC MOFs, demonstrating distinct differences in binding energies.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Nishant Kumar, Pratibha, Neeraj, Rokayya Sami, Ebtihal Khojah, Amani H. Aljahani, Amina A. M. Al-Mushhin
Summary: The effects of different drying methods and extraction solvents on the extraction and recovery of bioactive compounds in pomegranate peel were investigated using HPLC. Freeze-dried peel powder and methanol as extraction solvent showed higher extraction efficiency. These findings are important for utilizing pomegranate peel waste as food and nutraceuticals ingredients.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Yueyuan Niu, Yulong Yan, Jianwei Chai, Xiangyu Zhang, Yang Xu, Xiaolin Duan, Jing Wu, Lin Peng
Summary: Despite air quality control measures in Beijing, the influence of regional transport on volatile organic compounds (VOCs) pollution has been increasing. Vehicular exhaust dominated VOCs, but coal combustion became significant in the heating period, especially in the southern trajectories. Carcinogenic risks from benzene and ethylbenzene exceeded acceptable levels, and regional transport had a significant impact on VOCs pollution in northern Beijing.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Food Science & Technology
Naciye Kutlu, Asli Isci, Ozge Sakiyan, Asim Egemen Yilmaz
Summary: This study aimed to extract bioactive compounds from cornelian cherry using microwave and ohmic heating assisted microwave extraction. The results showed that ohmic heating prior to extraction enhanced the total phenolic compound yield and reduced extraction time significantly. The combined application of ohmic heating and microwave extraction proved to be a potential alternative method for total phenolic compounds extraction with increased yields and reduced extraction times.
FOOD AND BIOPROCESS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Ryohei Yagi, Takahiro Ueda
Summary: This study examined the time dependence of benzene adsorption uptake for ZIF-8, Cl-ZIF-8, and Br-ZIF-8 and analyzed the diffusion coefficient and saturated adsorption amount of benzene using a diffusion model. The saturated adsorption amount of benzene decreased in the order of ZIF-8, Cl-ZIF-8, and Br-ZIF-8. The activation energy and pre-exponential factor for benzene diffusion increased in the same order. The findings suggest that the 2-methylimidazolate moiety forms an effective attraction interaction with benzene molecules.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Food Science & Technology
Veronica Conti, Patrizia Salusti, Marco Romi, Claudio Cantini
Summary: This study compares the traditional drying method with a food dryer at different temperatures for producing chestnut flour. The results show that the traditional method produces lower quality flour but imparts a pleasant smoky taste. Additionally, toxic volatile molecules were found in the flour. However, the study also suggests the need for regulating temperature levels and stability in the traditional method.
Article
Chemistry, Multidisciplinary
Meysam Khosravifarsani, Samia Ait-Mohand, Benoit Paquette, Leon Sanche, Brigitte Guerin
Summary: The study showed that the [Cu-64]Cu-NOTA-C3-TP conjugate with Cu-64 labeling exhibited higher efficiency in internalization and nucleus accumulation in cancer cells compared to normal human fibroblasts. The in vitro results demonstrated over a 55,000-fold increase in cytotoxic potential post administration, indicating a significant additive effect between Cu-64 and the TP drug. These findings suggest the potential use of the [Cu-64]Cu-NOTA-C3-TP conjugate as a targeted chemoradiotherapeutic agent for treating colorectal cancer.
Review
Chemistry, Physical
Jing Xiao, Jia Chen, Juewen Liu, Hirotaka Ihara, Hongdeng Qiu
Summary: Covalent organic frameworks (COFs), a new porous crystalline material constructed by covalent links between building monomers, have made significant progress in chemistry and materials fields. However, traditional synthesis methods using solvothermal methods pose challenges to the environment, leading to the exploration of facile fabrication approaches.
GREEN ENERGY & ENVIRONMENT
(2023)
Article
Food Science & Technology
Oscar Y. Barron-Garcia, Bibiana Nava-Alvarez, Marcela Gaytan-Martinez, Eva Gonzalez-Jasso, Eduardo Morales-Sanchez
Summary: This study investigated the effects of ohmic heating blanching (OHB) at different temperatures (67-90°C) on the inactivation of polyphenol oxidase (PPO), color, and texture in Agaricus bisporus mushrooms. Results showed that OHB was able to inactivate PPO more quickly and with less impact on the color and texture of the mushrooms compared to conventional blanching. The OHB process also had a lower energy activation value.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Abu Talha Aqueel Ahmed, Sankar Sekar, Shubhangi S. Khadtare, Nurul Taufiqu Rochman, Bathula Chinna, Abu Saad Ansari
Summary: In this study, MnCo2S4 nanosheet catalyst was successfully synthesized and found to exhibit superior performance in hydrogen evolution. Compared to MnCo2S4, MnCo2S4 showed low overpotentials, moderate Tafel slope, and excellent sustainability. The outstanding performance can be attributed to the increased number of electrochemically active sites and enhanced electronic conductivity on the catalyst surface.
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Chemistry, Multidisciplinary
Xiaoman Zhang, Wangwang Xu, W. J. Meng, Andrew C. Meng
Summary: This study successfully grew high-quality single crystal AlScN nanowires through ultra-high vacuum reactive sputtering technique and characterized their structure and properties. The nanowires exhibit significantly reduced mosaic spread and predominantly single ferroelectric domains, as well as a high piezoelectric constant.
Article
Chemistry, Multidisciplinary
Tom E. de Vries, Elias Vlieg, Rene de Gelder
Summary: Networks are important for describing relationships between people, roads between cities, reactions between chemicals, and other interactions. Bipartiteness, dividing the network into two groups, can facilitate the study of the network's structure. We have developed an algorithm that can find a near-optimal bipartisation within a reasonable time frame and used it to uncover the hidden structure of the CSD cocrystal network.
Article
Chemistry, Multidisciplinary
Chuchu Han, Jing Yang, Xin Zhang, Aisen Li, Jiang Peng
Summary: An elastic crystal based on a photo-reactive acylhydrazone derivative is reported, which exhibits reversible bending behavior under UV irradiation and heating. The crystal undergoes reversible E<->Z isomerization under light and heating conditions. The crystal demonstrates excellent elastic properties and the bending can be controlled to control the output direction of red light.
Article
Chemistry, Multidisciplinary
Lingfeng Zhang, Yu Wang, Yefeng Wang, Shuai Liu, Na Zhang, Mingmin Yang, Haixia Ma, Zhaoqi Guo
Summary: This study designs and synthesizes a series of high-energy salts compounds without heavy metal ions and azide groups. The molecular structures and stability of the compounds are confirmed through single-crystal X-ray diffraction and intermolecular interaction analysis. Furthermore, the thermal stability, energetic properties, and electrical initiation properties of the compounds are investigated, suggesting their potential as primary explosives.