Materials Horizons, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 25, 2024
Inspired by the toughening phenomena in biological systems, a synergistic covalent-and-supramolecular polymerization strategy was applied to construct mechanically strong transparent materials.
Language: Английский
Progress in Polymer Science, Journal Year: 2024, Volume and Issue: 160, P. 101920 - 101920
Published: Dec. 11, 2024
Language: Английский
Citations
1
ChemCatChem, Journal Year: 2024, Volume and Issue: unknown
Published: May 25, 2024
Abstract Catalyst‐controlled diversity‐oriented synthesis (CatDOS) is an important research area for expanding molecular complexities and achieving high atomic economics. Many regiodivergent syntheses have been achieved through metal catalysis, covalent organocatalysis, non‐covalent organocatalysis by controlling the recognition function of catalysts. However, development CatDOS Brønsted base was relatively less developed than others so far. Numerous studies about demonstrated powerful abilities their cationic conjugate acids mainly in stereoselectivity instead regioselectivity. This concept review aims to conceptualize a new perspective consider potential role acid bases CatDOS. Recent representative examples are selected demonstrate site‐selectivity control single bond multiple bonds formation reactions. The summarized results show that even common tertiary amines, protic ammonium ions, could affect regioselectivity early‐ or late‐stage step during after initial deprotonation. also suggested properties ion‐pairing interactions be more basicity Perspectives hypotheses explaining mechanism included this review.
Language: Английский
Citations
0
Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(67)
Published: Aug. 9, 2024
Thiol-disulfide interchange has been a large field of study for both biochemists and physical organic chemists alike due to its prevalence within biological systems fundamentally interesting dynamic nature. More recently, efforts have made harness the power this reversible reaction make self-assembling macrocyclic molecules. However, less effort focused on fundamental work isolating these assemblies studying factors that control assembly sorting emerging cyclic systems. A more complete understanding controlling such self-assembly could also improve complex biology thiol exchange while aiding in design enable applications ranging from drug delivery biosensing new materials synthesis. We shown previously pnictogen-assisted enables formation discrete disulfide macrocycles cages without competition polymer wide variety alkyl thiols. In study, we report expansion methods form bearing aryl containing ligands, allowing access unreported These studies complement classical chemical rates products oxidation disulfides, show method revises some prevailing wisdom key by providing product distributions isolable formation.
Language: Английский
Citations
0
Polymer Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
We reported a methodology for the reducing agent mediated poly(disulfide)s nanonetwork formation from lipoic acid based monomer in water as highly stable potential delivery vehicle chemotherapeutic applications.
Language: Английский
Citations
0
Journal of Polymer Science, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 28, 2024
ABSTRACT Due to the lack of effective physical reprocessing or chemical recovery capabilities, thermosetting polymers face long‐term post‐disposing problems. The introduction dynamic covalent bonds can effectively combine ability with typical robust properties polymer. However, after multiple treatments, thermosets often suffer significant decrease in mechanical properties, so recycling and reuse is crucial necessary for sustainable development polymers. Herein, a series polyesters PβMδVL‐TA mono‐ bis‐terminal cyclic disulfide bond was first synthesized via esterification between terminal hydroxyl PβMδVL carboxyl thioctic acid (TA). Then, elastomer both reprocessability recyclability prepared by simple UV‐triggered ring‐opening polymerization disulfide. By regulating cross‐linking sites molecular weight bis‐PβMδVL‐TA, such polyester elastomers exhibit good tensile strength elasticity elastic reach 98% 10 cycles. Furthermore, reaction induced hot pressing UV light enables cross‐linked elastomers. Remarkably, efficient achieved recover pristine βMδVL monomer 90% yield presence ZnCl 2 as catalyst at 130°C.
Language: Английский
Citations
0
Macromolecules, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 13, 2024
The dynamicity and recyclability of a material are the chemical bases sustainable future smart materials. In this context, poly(disulfide)s 1,2-dithiolane very significant class polymers due to presence dynamic covalent disulfide bonds in main-chain polymer. Here we reported an amine-activated cascade initiation thiolate-induced ring opening polymerization (ROP) synthesize functional at room temperature under open-air condition. situ generation thiolate initiator by reaction thiolactone amine, stabilization, use phenyl isocyanate terminator enable us perform controlled manner. Additionally, situ, one-step, dual modification polymer chain end varying amine allowed access variety poly(disulfide)s. primary is found be more effective activator compared secondary amine. We also demonstrated living nature synthesized tailor-made copoly(disulfide)s. believe that ROP activated first report literature where can library amines functionalize diverse structures polymers. This methodology establishes versatile platform opens up enormous opportunities for synthesis
Language: Английский
Citations
0
Macromolecules, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 19, 2024
Polymerization-induced self-assembly (PISA) has been extensively studied for the preparation of a wide range morphologies. However, most current research in PISA focused on ordered solid assemblies; using to produce membraneless coacervates imposes challenges. Inspired by recent sticker–spacer model protein phase separation, we here demonstrate that amphiphilic poly(disulfide)s, prepared through an alternating ring-opening reaction-mediated polycondensation (ROMPOC) strategy, can situ self-coacervation into microsized liquid droplets. The ROMPOC relies thiolate's reversible SN2-type engagement with cyclic thiosulfate, promptly generating disulfide bond's terminal sulfenic acid, which functions as difunctional monomer, rapidly condenses proximate dithiols, and allows rapid polymer chain extension, ultimately yielding alternative poly(disulfide)s. In addition, found one representative thiosulfinate, 1,2-dithiane-1-oxide, serves modular sticker facilitating polymer-induced when paired suitable spacer monomers. resultant coacervates' physicochemical properties, including coalescence, mobility, molecular partitioning ability, be tailored adjusting monomer. Furthermore, introduction short, positively charged CRGGC peptide greatly enhances their ability concentrate biomacromolecules, making highly promising nucleic acid biosensing biomacromolecular delivery.
Language: Английский
Citations
0
Materials Horizons, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 25, 2024
Inspired by the toughening phenomena in biological systems, a synergistic covalent-and-supramolecular polymerization strategy was applied to construct mechanically strong transparent materials.
Language: Английский
Citations
0