Article
Chemistry, Multidisciplinary
Wang Xie, Jie Wu, Xiaochun Hang, Honghai Zhang, Kang Shen, Zhoulu Wang
Summary: By employing amino-functionalized dicarboxylate ligands to react with d(10) metal ions, four novel metal-organic frameworks were synthesized, each with unique structures and sensing capabilities. Characterization by various methods revealed the potential applications of these complexes in sensing technologies.
FRONTIERS IN CHEMISTRY
(2021)
Article
Polymer Science
Hua Wang, Zhou Lu, Shengyu Dai
Summary: The chain walking polymerization technology is convenient and efficient for the preparation of hyperbranched polyethylene and polar functionalized polyethylene. Two bis(benzocyclopentyl) a-diimine ligands and their corresponding Pd(II) catalysts were synthesized, enabling the polymerization of ethylene to generate hyperbranched polyethylene with low molecular weights and high branching densities. The Pd(II) catalysts also allowed the copolymerization of ethylene with MA to obtain hyperbranched E-MA copolymers with high MA incorporation ratios.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Water Resources
Neway Belachew, Aschalew Tadesse, Mebrahtu Hagos Kahsay, Desta Shumuye Meshesha, Keloth Basavaiah
Summary: L-Aspartic acid functionalized magnetite nanoparticles were synthesized using L-Asp as a capping agent. The nanoparticles exhibited highly crystalline and spherical shape, with superparamagnetic properties and high adsorption efficiency for Rhodamine B.
APPLIED WATER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Guoxiu Wang, Wenjuan Lv, Congjie Pan, Hongli Chen, Xingguo Chen
Summary: A novel chiral COF, DA-TD COF, was synthesized and used as a chiral stationary phase for open-tubular capillary electrochromatography, showing excellent enantioseparation efficiency and stability. The enantioseparation mechanism was also studied in this work.
CHEMICAL COMMUNICATIONS
(2022)
Article
Polymer Science
Weiling Hu, Lan Xu
Summary: Electrochemically mediated atom transfer radical polymerization (eATRP) is a promising technique for precise control over polymer molecular weights, molecular weight distribution, and complex architectures under low concentrations of copper-based ATRP catalysts. This study focused on eATRP of an ionic liquid monomer containing carboxylic acid groups in aqueous media, exploring the influence of protonation and dissociation of catalysts on the polymerization process. By examining various polymerization parameters, well-controlled poly(ionic liquids) (PILs) were obtained under certain conditions, showcasing the controlled/living property of the polymerization process. The research provides new insights into the precise synthesis of PIL-based block copolymers with adjustable properties and the potential development of functional materials with pH responsiveness and biocompatibility through eATRP of monomers containing carboxylic acid groups.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Chemical
Haonan Zhang, Haotian Zhang, Minli Tao, Wenqin Zhang
Summary: The study synthesized three functionalized polyacrylonitrile fiber catalysts through amination and quaternization, and explored their catalytic activity in the Friedel-Crafts alkylation reaction. The results showed that one of the catalysts exhibited the highest catalytic activity in the reaction and had strong recycling performance. Additionally, this catalyst showed excellent catalytic activity for most aromatic aldehydes containing moderate electron donating groups.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Applied
Anastasija Konstantinova, Liga Avotina, Gunta Kizane, Aleksandrs Puckins, Sergejs Osipovs, Elena Kirilova
Summary: The substitution reaction of 3-N-(2-chloroacetamido)benzanthrone with various amino acids and the possibility of fluorescent labelling of amino acids using this halogenated benzanthrone have been studied. Arginine was found to be the most reactive amino acid in the reaction. The spectral behavior of the new benzanthrone derivatives depends on the polarity of the medium and exhibits fluorescent solvatochromism due to intramolecular charge transfer. The synthesized compounds show promise for studying peptides and proteins, as well as visualizing biological objects.
Article
Chemistry, Inorganic & Nuclear
Joanna Zakrzewska, Pawel Uznanski
Summary: The synthesis and characterization of adducts of n-alkyl amine and palladium n-alkyl carboxylate as precursors for palladium nanoparticles were carried out using various techniques. The presence of amine ligands was found to stabilize palladium salt aggregates and facilitate the formation of nanoparticles, revealing a unique stabilization mechanism for the palladium nanoparticles.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Organic
Kento Iwai, Akari Hikasa, Kotaro Yoshioka, Shinki Tani, Kazuto Umezu, Nagatoshi Nishiwaki
Summary: The central carbonyl group of diethyl mesoxalate (DEMO) is highly electrophilic and can be attacked by versatile nucleophiles. Even a less nucleophilic acid amide can serve as a nucleophile with DEMO to produce N,O-acetal. The resulting N,O-acetal can then undergo base treatment to generate N-acylimine, which is also highly electrophilic and can accept a second nucleophilic addition by an amine to form alpha,alpha-bis(functionalized) aminals. This protocol allows for the modification of two different amino groups, resulting in the production of tetra-functionalized methane derivatives on demand. The ring closure between the amide moiety and the amino group is achieved using the structural features to form a six-membered ring.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Polymer Science
Stefano Gazzotti, Marco Aldo Ortenzi, Hermes Farina, Alessandra Silvani
Summary: 1,3-Dioxolan-4-ones (DOX) chemistry is used to synthesize UV-curable polylactic acid (PLA)-based copolymers. Copolymerization reactions with different DOX loadings are performed using a solvent-free, metal-catalyzed protocol. The structure and properties of the products are characterized using NMR and SEC analysis.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2022)
Review
Chemistry, Medicinal
Komal Sharma, Krishna K. Sharma, Amit Mahindra, Naina Sehra, Nitin Bagra, Shams Aaghaz, Rajesh Parmar, Gajanan K. Rathod, Rahul Jain
Summary: Modified and synthetic alpha-amino acids have diverse applications, and histidine is one such amino acid that can be subjected to synthetic modifications. Modified histidines have various applications ranging from biological activities to catalysis, nanotechnology, and polymer chemistry. Histidine plays an important role in scientific research.
MEDICINAL RESEARCH REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Cristina Chircov, Alexandra Catalina Birca, Bogdan Stefan Vasile, Ovidiu-Cristian Oprea, Keng-Shiang Huang, Alexandru Mihai Grumezescu
Summary: This study investigated a one-step synthesis and functionalization of magnetite nanoparticles using microfluidics, and characterized the obtained nanoparticles using various analysis methods. The results demonstrated the potential of microfluidic platform for developing functionalized MNPs.
Article
Chemistry, Applied
Baki Hazer, Richard D. Ashby
Summary: This study synthesized novel tannin-functionalized polypropylene copolymers to inhibit the oxidation of vegetable oils for potential use as packaging materials. The results showed that the tannic acid grafted polypropylene copolymers retarded oligomerization of linseed oil, making them a promising packaging material for vegetable oils.
Article
Chemistry, Multidisciplinary
Kseniia Vikanova, Elena Redina, Gennady Kapustin, Marina Chernova, Olga Tkachenko, Vera Nissenbaum, Leonid Kustov
Summary: The use of available renewable sources for the production of organic compounds is recognized worldwide, but the development of green catalytic technologies, including catalyst synthesis and optimal process conditions, is a challenge for researchers. In this study, 2,5-bis(hydroxymethyl)furan was obtained by hydrogenation of 5-hydroxymethylfurfural using a catalytic system with 1% wt of platinum supported on ceria-zirconia mixed oxide, achieving a high yield of the desired alcohol with a slight increase in H2 pressure.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Food Science & Technology
William Cardoso Lima, Leandro S. Oliveira, Adriana S. Franca
Summary: This study developed a low-cost adsorbent with a chemically modified surface bearing sulfonic groups using sunflower crop residue, which showed advantages in adsorption of phenylalanine. Optimization results indicated a higher adsorption capacity under specific conditions.