WebAs another example of context dependence in dynamic covalent polymers, Winne and Du Prez have found that the dynamic bonding and debonding of TAD-indoles (cf.Scheme 6d), 51 the stoichiometry of indoles and TADs in the network plays a crucial and interesting role. When there is a 1 : 1 equivalence between the two reactive moieties, full cross ... WebMay 23, 2024 · The inclusion of dynamic covalent bonds in cross-linked polymer networks enables material reprocessing towards a circular economy. Bond dynamicity in this class of materials, called covalent adaptable networks (CANs), is characterized by a mixture of spectroscopic chemical and bulk materials techniques. These characterization methods …

Dynamic Covalent Bonds in Polymeric Materials - 百度学术

WebDisulfide bonding plays an important role not only as dynamic covalent bond, but also in ERD recycling. Recently, Alaitz Ruiz de Luzuriaga and co-workers demonstrated that the … WebThe Fourier-transform infrared (FTIR) spectra of compounds 1, 2d, and the solvent-free polymer 3d revealed that the aldehyde carbon–oxygen double bond (C=O) stretch signal at 1705 cm −1 and the carbon–hydrogen bond (C–H) stretch signal at 2873 cm −1 almost disappeared after the reaction, whereas a broad oxygen–hydrogen bond (O–H ... dibismuth trioxide

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Dynamic covalent chemistry (DCvC) is a synthetic strategy employed by chemists to make complex supramolecular assemblies from discrete molecular building blocks. DCvC has allowed access to complex assemblies such as covalent organic frameworks, molecular knots, polymers, and novel macrocycles. … See more Dynamic systems are collections of discrete molecular components that can reversibly assemble and disassemble. Systems may include multiple interacting species leading to competing reactions. See more Reactions used in DCvC must generate thermodynamically stable products to overcome the entropic cost of self-assembly. The reactions must form covalent linkages … See more • Organic chemistry • Supramolecular chemistry • Template effect See more In dynamic reaction mixtures, multiple products exist in equilibrium. Reversible assembly of molecular components generates products and semi-stable intermediates. Reactions can proceed along kinetic or thermodynamic pathways. Initial … See more The concept of a thermodynamic template is demonstrated in scheme 1. A thermodynamic template is a reagent that can stabilize the form of one product over others by lowering … See more Dynamic covalent chemistry has allowed access to a wide variety of supramolecular structures. Using the above reactions to link molecular … See more WebAbstract. Dynamic covalent chemistry (DCvC) has been strongly integrated into diverse research fields, and has enabled easy access to a variety of combinatorial libraries, 2-D macrocycles, and 3-D molecular cages that target many important applications, such as drug discovery, biotechnology, molecular separation, light harvesting, etc. DCvC ... WebFeb 4, 2014 · The design of dynamic covalent bonds is crucial to self-healing polymer materials, but the reaction normally occurs in the presence of heat or/and catalysts. Ying et al.report a catalyst-free ... dib international transfer rate today