Molecules, Vol. 29, Pages 1701: Iodine-Catalyzed Cascade Annulation of 4-Hydroxycoumarins with Aurones: Access to Spirocyclic Benzofuran & ndash;Furocoumarins
Molecules, Vol. 29, Pages 1701: Iodine-Catalyzed Cascade Annulation of 4-Hydroxycoumarins with Aurones: Access to Spirocyclic Benzofuran–Furocoumarins
Molecules doi: 10.3390/molecules29081701
Authors:
Xuequan Wang
Changhui Yang
Dan Yue
Mingde Xu
Suyue Duan
Xianfu Shen
An attractive approach for the preparation of spirocyclic benzofuran–furocoumarins has been developed through iodine-catalyzed cascade annulation of 4-hydroxycoumarins with aurones. The reaction involves Michael addition, iodination, and intramolecular nucleophilic substitution in a one-step process, and offers an eff...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Xuequan Wang Changhui Yang Dan Yue Mingde Xu Suyue Duan Xianfu Shen Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1702: Determination of Bioactive Compound Kynurenic Acid in Linum usitatissimum L.
ymowicz
Kynurenic acid (KYNA) is a bioactive compound exhibiting multiple actions and positive effects on human health due to its antioxidant, anti-inflammatory and neuroprotective properties. KYNA has been found to have a beneficial effect on wound healing and the prevention of scarring. Despite notable progress in the research focused on KYNA observed during the last 10 years, KYNA’s presence in flax (Linum usitatissimum L.) has not been proven to date. In the present study, parts of flax plants were analysed for KYNA synthesis. Moreover, eight different cultivars of flax seeds were tested for the prese...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Magdalena Wr óbel-Kwiatkowska Waldemar Turski Gra żyna Silska Magdalena Rakicka-Pustu łka Lucyna Dymi ńska Waldemar Rymowicz Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1688: Temperature Dependence of the Polar and Lewis Acid & ndash;Base Properties of Poly Methyl Methacrylate Adsorbed on Silica via Inverse Gas Chromatography
Molecules, Vol. 29, Pages 1688: Temperature Dependence of the Polar and Lewis Acid–Base Properties of Poly Methyl Methacrylate Adsorbed on Silica via Inverse Gas Chromatography
Molecules doi: 10.3390/molecules29081688
Authors:
Tayssir Hamieh
The adsorption of polymers on solid surfaces is common in many industrial applications, such as coatings, paints, catalysis, colloids, and adhesion processes. The properties of absorbed polymers commonly vary with temperature. In this paper, inverse gas chromatography at infinite dilution was used to determine the physicochemical characterization of PMMA adsorbed on s...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Tayssir Hamieh Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1689: Phytochemical Profile and Bioactivity of Bound Polyphenols Released from Rosa roxburghii Fruit Pomace Dietary Fiber by Solid-State Fermentation with Aspergillus niger
This study aimed to investigate the phytochemical profile, bioactivity, and release mechanism of bound polyphenols (BPs) released from Rosa roxburghii fruit pomace insoluble dietary fiber (RPDF) through solid-state fermentation (SSF) with Aspergillus niger. The results indicated that the amount of BPs released from RPDF through SSF was 17.22 mg GAE/g DW, which was significantly higher than that achieved through alkaline hydrolysis extraction (5.33 mg GAE/g DW). The BPs released through SSF exhibited superior antioxidant and α-glucosidase inhibitory activities compared to that released through alkaline hydroly...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Qing Chen Juan Su Yue Zhang Chao Li Siming Zhu Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1690: UHPLC-HRMS/MS Chemical Fingerprinting of the Bioactive Partition from Cultivated Piper aduncum L.
This study provides the first chemical fingerprint of an antimycobacterial sample from P. aduncum cultivated in an agroecological system. (Source: Molecules)
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Ad élia Viviane de Luna Thayssa da Silva Ferreira Fagundes Ygor Jess é Ramos Marlon Heggdorne de Ara újo Michelle Fraz ão Muzitano Sanderson Dias Calixto Thatiana Lopes Bi á Ventura Simão George Azevedo de Queiroz Elsie Franklin Guimar ães Andr é Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1691: The Antioxidant Action of Astragali radix: Its Active Components and Molecular Basis
Yongqi Liu
Astragali radix is a traditional medicinal herb with a long history and wide application. It is frequently used in prescriptions with other medicinal materials to replenish Qi. According to the classics of traditional Chinese medicine, Astragali radix is attributed with properties such as Qi replenishing and surface solidifying, sore healing and muscle generating, and inducing diuresis to reduce edema. Modern pharmacological studies have demonstrated that some extracts and active ingredients in Astragali radix function as antioxidants. The polysaccharides, saponins, and flavonoids in Astragali radix offer b...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Juan Yao Ting Peng Changxin Shao Yuanyuan Liu Huanhuan Lin Yongqi Liu Tags: Review Source Type: research
Molecules, Vol. 29, Pages 1692: Investigation of Structures, Stabilities, and Electronic and Magnetic Properties of Niobium Carbon Clusters Nb7Cn (n = 1 & ndash;7)
Molecules, Vol. 29, Pages 1692: Investigation of Structures, Stabilities, and Electronic and Magnetic Properties of Niobium Carbon Clusters Nb7Cn (n = 1–7)
Molecules doi: 10.3390/molecules29081692
Authors:
Hui-Fang Li
Huai-Qian Wang
Jia-Ming Zhang
Lan-Xin Qin
Hao Zheng
Yong-Hang Zhang
The geometrical structures, relative stabilities, and electronic and magnetic properties of niobium carbon clusters, Nb7Cn (n = 1–7), are investigated in this study. Density functional theory (DFT) calculations, coupled with the Saunders Kick global search, are conducted to explore the structural prop...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Hui-Fang Li Huai-Qian Wang Jia-Ming Zhang Lan-Xin Qin Hao Zheng Yong-Hang Zhang Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1693: Effects of Active Ingredients in Alcoholic Beverages and Their De-Alcoholized Counterparts on High-Fat Diet Bees: A Comparative Study
han
Yilin You
The mechanisms by which alcohol, alcoholic beverages, and their de-alcoholized derivatives affect animal physiology, metabolism, and gut microbiota have not yet been clarified. The polyphenol, monosaccharide, amino acid, and organic acid contents of four common alcoholic beverages (Chinese Baijiu, beer, Chinese Huangjiu, and wine) and their de-alcoholized counterparts were analyzed. The research further explored how these alcoholic beverages and their non-alcoholic versions affect obesity and gut microbiota, using a high-fat diet bee model created with 2% palm oil (PO). The results showed that wine, pos...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Guanghe Fan Xiaofei Wang Cuicui Gao Xiping Kang Huimin Xue Weidong Huang Jicheng Zhan Yilin You Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1694: Electrocatalytic Reduction of CO2 to CO by Molecular Cobalt & ndash;Polypyridine Diamine Complexes
Molecules, Vol. 29, Pages 1694: Electrocatalytic Reduction of CO2 to CO by Molecular Cobalt–Polypyridine Diamine Complexes
Molecules doi: 10.3390/molecules29081694
Authors:
Yong Yang
Fang Xie
Jiahui Chen
Si Qiu
Na Qiang
Ming Lu
Zhongli Peng
Jing Yang
Guocong Liu
Cobalt complexes have previously been reported to exhibit high faradaic efficiency in reducing CO2 to CO. Herein, we synthesized capsule-like cobalt–polypyridine diamine complexes [Co(L1)](BF4)2 (1) and [Co(L2) (CH3CN)](BF4)2 (2) as catalysts for the electrocatalytic reduction of CO2. Under catalytic conditions, compl...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Yong Yang Fang Xie Jiahui Chen Si Qiu Na Qiang Ming Lu Zhongli Peng Jing Yang Guocong Liu Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1696: The Composition of Volatiles and the Role of Non-Traditional LOX on Target Metabolites in Virgin Olive Oil from Autochthonous Dalmatian Cultivars
This article contributes to the selection of the optimal harvest time for the production of VOOs with the desired aromatic properties and to the knowledge of the varietal characteristics of VOOs. (Source: Molecules)
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Barbara Soldo Maja Juki ć Špika Igor Paskovi ć Elma Vuko Marija Poli ć Pasković Ivica Ljubenkov Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1697: On the Diffusion of Ionic Liquids in ILs@ZIF-8 Composite Materials: A Density Functional Theory Study
Lei Liu
Recently, composite materials consisting of ionic liquids (ILs) and metal–organic frameworks (MOFs) have attracted a great deal of attention due to their fantastic properties. Many theoretical studies have been performed on their special structures and gas separation applications. Yet, the mechanism for the diffusion of ILs inside MOF channels still remains unclear. Here, the DFT calculations (e.g., rigid and relaxed potential energy surface, PES, scan) together with frontier orbital analysis, natural charge analysis, and energy decomposition analysis were performed to investigate the diffusion be...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Longlong Liu Kun Jiang Qingjun Chen Lei Liu Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1695: Core & ndash;Shell CoS2@MoS2 with Hollow Heterostructure as an Efficient Electrocatalyst for Boosting Oxygen Evolution Reaction
In this study, a well-designed electrocatalyst featuring a core–shell structure was synthesized with cobalt sulfides as the core and molybdenum disulfide nanosheets as the shell. The core–shell structure can prevent the agglomeration of MoS2, expose more active sites, and facilitate electrolyte ion diffusion. A CoS2/MoS2 heterostructure is formed between CoS2 and MoS2 through the chemical interaction, and the surface chemistry is adjusted. Due to the morphological merits and the formation of the CoS2/MoS2 heterostructure, CoS2@MoS2 exhibits excellent electrocatalytic performance during the oxyge...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Donglei Guo Jiaqi Xu Guilong Liu Xu Yu Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1698: Supramolecular Solid Complexes between bis-pyridinium-4-oxime and Distinctive Cyanoiron Platforms
Foretić
The structural features and optical properties of supramolecular cyanoiron salts containing bis-pyridinium-4-oxime Toxogonin® (TOXO) as an electron acceptor are presented. The properties of the new TOXO-based cyanoiron materials were probed by employing two cyanoiron platforms: hexacyanoferrate(II), [Fe(CN)6]4– (HCF); and nitroprusside, [Fe(CN)5(NO)]2– (NP). Two water-insoluble inter-ionic donor–acceptor phases were characterized: the as-prepared microcrystalline reddish-brown (TOXO)2[Fe(CN)6]·8H2O (1a) with a medium-responsive, hydrochromic ...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Igor Picek Dubravka Matkovi ć-Čalogović Goran Dra žić Gregor Kapun Primo ž Šket Jasminka Popovi ć Bla ženka Foretić Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1686: Herbal Polyphenols as Selenium Reducers in the Green Synthesis of Selenium Nanoparticles: Antibacterial and Antioxidant Capabilities of the Obtained SeNPs
In this study, herbal extracts were used in the green synthesis of SeNPs. The influence of herbal species, the ratio of the reagents, and post-reaction heating on the antibacterial and antioxidant properties of obtained SeNPs were investigated. The relationship between these properties and the physical parameters of obtained nanoparticles (e.g., size, shape) was also studied. It has been proven that SeNPs showed higher antioxidant and antibacterial properties in comparison to herbal extracts taken for their synthesis. Heating of the post-reaction mixture did not affect the SeNP size, shape, or other studied properties. (Source: Molecules)
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Aleksandra Sentkowska Julia Konarska Jakub Szmytke Anna Grudniak Tags: Article Source Type: research
Molecules, Vol. 29, Pages 1687: Enhancement of Astaxanthin Bioaccessibility by Encapsulation in Liposomes: An In Vitro Study
n Zhao
Fei Xu
Astaxanthin was encapsulated in liposomes by a thin layer dispersion and ultrasound method using soybean phospholipid. The digestion properties of liposomes for encapsulating astaxanthin were investigated in light of particle size, size distribution, zeta potential, and microstructure during in vitro digestion as a function of time. These results exhibited that the average particle size increased gradually with liposomal vesicles retained round shapes and a fairly uniform distribution after passage through the simulated gastric fluid digestion. The result revealed that astaxanthin-loaded liposomes were ...
Source: Molecules - April 9, 2024 Category: Chemistry Authors: Li Pan Haojie Meng Jiaqi Li Zongjie Liu Dongsheng Zhang Zhengyang Liu Qian Zhao Fei Xu Tags: Article Source Type: research
