Article
Chemistry, Multidisciplinary
Michael A. Brook
Summary: This article discusses the stability and functionality of silicones, highlighting the limited organic chemistry practices in commercial silicones. The study presents a series of simple organic reactions applied to silicone oils, enabling the preparation of a wide range of functional silicones.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Michael A. Brook
Summary: Silicones are commonly used for their stability in various environmental conditions and can be given additional functionalities through the introduction of organic functional groups. However, the application of organic chemistry in commercial silicones is limited, which restricts the types of desired functionalities. This review presents a series of simple organic reactions that can effectively take place on silicone oils, enabling the preparation of a wide variety of functional silicones.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Lina Meng, Wenyu Wang, A. P. Lei Li, Shengyu Feng
Summary: Two new anionic silicone surfactants were synthesized for the first time, and their surface properties and aggregate characteristics were investigated.
Article
Chemistry, Multidisciplinary
Xiangjun Chen, Peiqi Zuo, Guixin Zhang, Rui Min, San Zhao
Summary: The study found that the influence of AEO9 on the wettability of anthracite coal was the smallest at a concentration of 0.5 wt %. XPS analysis showed an increase in C-O functional groups on the anthracite surface after adsorption of AEO9. DFT calculations and dynamic simulation results demonstrated that AEO9 could promote water molecule migration and enhance the thickness of the water molecular layer on the anthracite surface.
Review
Polymer Science
Hu Li, Raffaello Papadakis
Summary: Graphene has outstanding properties and potential applications across various research and technology areas, but its insolubility and poor dispersibility are major issues. Tethering sugars onto graphene through click-chemistry is gaining attention for improving these properties and opening new routes for biomedical and environmental applications. This review focuses on recent modifications of graphene and other carbon rich materials through click chemistry.
Article
Chemistry, Multidisciplinary
Philipp Keckeis, Enriko Zeller, Carina Jung, Patricia Besirske, Felizitas Kirner, Cristina Ruiz-Agudo, Helmut Schlaad, Helmut Coelfen
Summary: Post-polymerization modification offers an elegant method to produce tailor-made materials, particularly with well-defined block copolymers of the poly(2-oxazoline) family showing potential as a universal toolkit. Triblock copolymers with distinct water-soluble, alkyne- and alkene-containing segments were successfully synthesized and orthogonally modified with various functional molecules through CuAAC and TE click reactions, and utilized for the synthesis of nanoparticles.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Agriculture, Multidisciplinary
Fang Fu, Yulin Fan, Langqiu Chen, Jing Zhang, Jiping Li, Jingyi Liao, Guochao Zhang
Summary: A series of nonionic disaccharide-based surfactants were synthesized and their physicochemical properties were investigated. The surfactants demonstrated good water solubility, surface activity, foaming ability, and emulsifying property, suggesting their potential applications in related fields.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Leona L. Rodrigues, Aaron S. Micallef, Michael C. Pfrunder, Vinh X. Truong, John C. McMurtrie, Tim R. Dargaville, Anja S. Goldmann, Florian Feist, Christopher Barner-Kowollik
Summary: A highly efficient ligation system based on visible light-induced rearrangement was introduced, generating a thiophenol for rapid thiol-Michael additions without the need for additives. The self-catalyzed ligation through pyridine mediated deprotonation of the photochemically generated thiophenol was described, leading to additive-free thiol-Michael reactions. The study explored various reaction conditions, solvents, and substrates, showcasing excellent end group fidelity in polymer modification.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Bing Zu, Yonghong Guo, Chuan He
Summary: The catalytic enantioselective construction of boron-stereogenic compounds through asymmetric copper-catalyzed azide-alkyne cycloaddition has been achieved, providing a wide range of novel optically active boron-stereogenic heterocycles with potential applications in chiral optoelectronic materials. This method expands the chemical space of chiroptical boron-based dye platform, showing bright fluorescence and promising optical properties.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Polymer Science
E. Semerci, T. Erdogan Bedri, N. Kizilcan
Summary: A new polymer nanocomposite was successfully synthesized, consisting of silicon nitride nanoparticles as a conductive filler and PMMA as a polymer matrix, showing higher thermal conductivity. The surface of silicon nitride nanosheets was functionalized through successive chemical modification and click reaction, leading to the formulation of a thermal interface material with improved performance. Results indicated that the chemically modified nanocomposite-based thermal interface material exhibited considerably higher thermal conductivity compared to the physically blended nanocomposite.
Article
Multidisciplinary Sciences
Qiaochu Jiang, Wenjun Zhan, Xiaoyang Liu, Lin Bai, Manli Wang, Ying Xu, Gaolin Liang
Summary: The authors present an assembly-driven, regioselective metal-free azide-alkyne cycloaddition reaction with potential applications in biomedical contexts. In the absence of metal ions, supramolecular self-assembly in an aqueous solution is used to achieve excellent regioselectivity in the reaction, paving the way for more metal-free reactions in chemical biology.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Shanmugam Revathi, Aditya L. Shinde, Mulimani K. Rajashekhar, Debasish Mandal, Amit Ranjan Maity, Somenath Garai, Tapas Ghatak
Summary: A novel synthetic approach using innovative metal-free N-heterocyclic imino catalysts has been developed to efficiently synthesize regioselective 1,4-disubstituted 1,2,3-triazoles. Experimental observations have been supported by TD-DFT computational studies. This state-of-the-art metal-free approach serves as an alternative to CuAAC and shows promising potential in the field of synthesizing regioselective 1,4-triazoles.
CHEMICAL COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Parveen Kumar, Seon-Hwa Kim, Sonyabapu Yadav, Sung-Han Jo, Seong Yoo II, Sang-Hyug Park, Kwon Taek Lim
Summary: Cross-linking of nanocarriers allows targeted drug release, addressing issues such as drug leakage and side effects, thereby improving the efficacy of nanomedicines.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Junfeng Chen, Aoon Rizvi, Joseph P. Patterson, Craig J. Hawker
Summary: This study reports a method to prepare libraries of discrete PEG analogues with a branched, nonlinear structure, which can achieve efficient nanoparticle assembly while reducing antibody recognition. The results illustrate the advantages of discrete macromolecules in terms of improved properties and reduced antibody responses.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Polymer Science
Tian-Xin Yu, Ya-Yuan Liu, Fu-Yue Tian, Nan-Ying Ning, Bing Yu, Ming Tian
Summary: This study explores a light curing system for improving the mechanical properties of 3D printed silicone elastomer. The system uses vinyl terminated polysiloxane as the macromer and thiol containing polysiloxane as the crosslinking agent. By introducing a chain extension reaction with the addition of dithiol molecules, a light curing system with chain extension is successfully designed and realized. The reinforced light curing system, with lower viscosity of the precursor, demonstrates better tensile strength and elongation at break, reaching 525.5 kPa and 601%, respectively. This system provides a feasible solution to the contradiction between precursor viscosity and mechanical properties in DLP 3D printing.
CHINESE JOURNAL OF POLYMER SCIENCE
(2023)