In recent years, metal-free photoredox-catalyzed atom transfer radical polymerization (O-ATRP) has gained wide attention because of its advantages (e.g., no metal contamination and mild reaction conditions). However, this traditional one-photon excitation catalysis thermodynamic limits. Most photocatalysts cannot effectively reduce the initiators drive under visible light. Herein, we investigate two-photon excitation-catalyzed O-ATRP, in which catalyst can absorb two photons to accumulate...

Ring-opening polymerization (ROP) is a promising approach to accessing well-defined polyesters with superior (bio)degradability and recyclability. However, the living/controlled of glycolide (GL), well-known sustainable monomer derived from carbon monoxide/dioxide, has never been reported due extremely low solubility its polymer in common solvents. Herein, we report first anionic ROP GL strong protic fluoroalcohols (FAs), which are conventionally considered incompatible polymerization....

Organic halide salts in combination with metal or organic compound are the most common and essential catalysts ring-opening copolymerizations (ROCOP). However, role of was neglected. Here, we have uncovered complex behavior halides ROCOP epoxides aziridine cyclic anhydride. Coordination chain-ends to cations, electron-withdrawing effect, leaving ability atoms, chain-end basicity/nucleophilicity, terminal steric hindrance cause three types side reactions: single-site transesterification,...

This Letter reports the first formation of free-standing plasmonic monolayer nanosheets by self-assembly AuNPs without assistance from a planar interface. The strategy involves coating poly(caprolactone)-b-poly(ethylene oxide) (PCL-b-PEO) diblock copolymers on AuNPs, followed two-dimensional (2D) resultant amphiphilic in aqueous phase. crystallization PCL blocks, affected their grafting density and radius gyration, drives AuNP nanosheets, which undergoes growth process individual micelles to...

Developing affordable and scalable energy storage solutions is essential to decarbonizing power systems. The conversion of renewable electricity into chemical carriers such as ammonia has attracted extensive attention from academia industry. Many Power-to-Ammonia (PtA) plants have been conceptualized developed worldwide in recent years. PtA plant an integration multiple electrochemical processes, each with a distinct set operational constraints cost structure. One the problems operation...

Two hydrophobic ionic liquids (ILs) 1-alkyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([C2mim][NTf2] and [C4mim][NTf2]) were synthesized. The binary mixtures of the two ILs prepared with dimethyl carbonate (DMC) or diethyl (DEC) over entire mole fraction range, respectively. density viscosity determined by an automated DMA 5000 M a Lovis 2000 ME Anton Paar Rotational Stabinger Viscometer at temperatures ranging from 288.15 to 328.15 K. uncertainties are ur(ρ) = 0.00120 ur(η)...

The advancement of polymeric materials relies heavily on the innovation in polymerization reactions. In this study, we have discovered alternating copolymerization isothiocyanate (ITC) and epoxide, which results a nearly unexploited sulfur-containing polymer, polythioimidocarbonate (PTC). Provided with simple two-component catalyst, i.e., Lewis pair consisting triethylborane (Et3B) excess phosphazene base (PB), starts from an alcohol proceeds strictly highly chemoselective manner, yielding...

The synthesis of poly(ethylene oxide) (PEO) with amino end group, a key functionality for PEGylation, is long-standing challenge. Multistep routes based on postmodification or covalent protection have been adopted to circumvent ethoxylation the group by ethylene oxide (EO). Here, we report noncovalent strategy one-step PEO amine. An (di)alcohol mixed small amount mild phosphazene base and excess triethylborane (Et3B) before addition EO. complexation Et3B guarantees that polymerization EO...

Abstract Well-defined multicrystalline multiblock polymers are essential model for advancing crystallization physics, phase separation, self-assembly, and improving the mechanical properties of materials. However, due to different chain incompatible synthetic methodologies, with more than two crystallites rarely reported. Herein, by combining polyhomologation, ring-opening polymerization, catalyst switch strategy, we synthesized a pentacrystalline pentablock quintopolymer, polyethylene- b...

Complexation between polymers of different species in a common solvent is fundamental process various applications such as functional polymeric membrane and drug delivery, yet the understanding energetics, phase behaviors, kinetics polymer complexation rather challenging partially due to multi-component nature system. In this work, we investigate hydrogen-bonding poly(acrylic acid) (PAA) poly(vinylpyrrolidone) (PVPON) solvents, identify variety states, including homogenous solution, solid...

1,4-Copolymerization of 1,3-cyclohexadiene with isoprene and terpolymerization styrene have been achieved by cationic half-sandwich fluorenyl rare-earth metal species.

Abstract Polyolefin‐ b ‐poly(ethylene oxide) (PEO) represents the most widely investigated amphiphilic block copolymers. So far, one‐pot continuous synthesis of such hybrid copolymers has only been fulfilled by anionic polymerization through sequential addition vinyl monomers and ethylene oxide (EO). It still remains challenging to achieve altogether high efficiency, molar mass for PEO. Here, we report a copolymerization approach polyisoprene/polystyrene(PI/PS)‐ ‐PEO, in which PI/PS are...

ABSTRACT A series of new mononuclear neutral and water‐soluble cationic rhodium (Rh) complexes bearing strong π‐acidic dibenzo[ a , e ]cyclooctatetraene (dbcot) diene ligand have been synthesized structurally characterized. In the polymerization phenylacetylene, dbcot Rh complex exhibits higher catalytic activity than corresponding cod‐based in both organic solvent aqueous media, affording high cis‐transoidal PPAs with up to 99% cis ‐contents, moderate molecular weights, broad weight...

Abstract Organic halide salts in combination with metal or organic compound are the most common and essential catalysts ring‐opening copolymerizations (ROCOP). However, role of was neglected. Here, we have uncovered complex behavior halides ROCOP epoxides aziridine cyclic anhydride. Coordination chain‐ends to cations, electron‐withdrawing effect, leaving ability atoms, chain‐end basicity/nucleophilicity, terminal steric hindrance cause three types side reactions: single‐site...

The evaluation of the impacts new sections on highway network is an essential aspect feasibility study. Existing studies predominantly concentrated engineering-oriented assessments, often overlooking their potential effects parallel and overall network. In this research, we present model for based complex networks, focusing connectivity imbalance transportation networks. This serves as a supplementary approach enhancing analysis projects. comprises three distinct modules, namely, network,...

Abstract Two thermosensitive copolymers of acrylates (PMP/PEP) and a thermo/light sensitive copolymer acrylate with acrylamide (PMABz) are synthesized via ring‐opening reaction subsequent radical polymerization using facile one‐pot method. The lower critical solution temperature (LCST) PMP PEP shows dependence on the content structural unit can be easily tuned to 18–35 °C by mercaptoethanol‐mediated control molecular weight. isomerization PMABz reversibly induced alternating irradiation at...

In this work, a set of well-defined linear triblock copolymers and star block (3 4-arms) with semi-crystalline blocks consisting poly(ethylene oxide) (PEO) poly(ε-caprolactone) (PCL), synthesized by combining ring-opening polymerization organic catalyst switch strategy, were studied as thermosensitive gel-forming biomaterials for applications in 3D extrusion printing. The hydrogels derived from underwent temperature-dependent sol–gel–sol transition, behaving flowing sol at room temperature...

Data quality is the foundation of data-driven applications in transportation. problems such as missing and invalid data could sharply reduce performance methods used these applications. Although there exist plenty studies related to issues, they only focus on or caused by infrastructure failures (e.g., loop detector malfunction). In general, a lack attention issues from insufficient management. This paper proposes tensor decomposition based framework tackle specific problem which occurs when...

Front Cover: In articule number 2000394 by Andreas Lendlein and co-workers, a multifunctional material based on rhodium-phosphine coordination polymer network is capable of stimuli-responsive fluorescence, reshapeability, selfhealing, allows modular fabrication.

Individual mobility is driven by activities and restricted geographically, especially for trip destination prediction in public transport. An individual may perform the same activity at different places (e.g., using stations shopping), which not modeled existing studies. The paper proposes a deep learning model with activity, geographic sequential (DeepAGS) information predicting an individual's next destination. It uses word embedding, GCN, adaptive neural fusion gate to representation...