Category: 23783-42-8

Lin, Qianming published the artcileKinetic trapping of 3D-printable cyclodextrin-based poly(pseudo)rotaxane networks, HPLC of Formula: 23783-42-8, the main research area is cyclodextrin polypseudo rotaxane network three dimensional printing.

Synthetically trapping kinetically varied (super)structures of mol. assemblies and amplifying them to the macroscale is a promising, yet challenging, approach for the advancement of meta-stable materials. Here, we demonstrated a concerted kinetic trapping design to timely resolve a set of transient polypseudorotaxanes in solution and harness a crop of them via micro-crystallization By installing stopper or speed bump moieties on the polymer axles, meta-stable polypseudorotaxanes with segmented cyclodextrin blocks were hierarchically amplified into crystalline networks of different crosslinking densities at mesoscale and viscoelastic hydrogels with 3D-printability in bulk. We demonstrated simultaneous 3D-printing of two polypseudorotaxane networks from one reactive ensemble and their conversion to heterogeneous polyrotaxane monoliths. Spatially programming the macroscale shapes of these heterogeneous polyrotaxanes enabled the construction of moisture-responsive actuators, in which the shape morphing originated from the different numbers of cyclodextrins interlocked in these polyrotaxane networks.

Chem published new progress about Crystal structure. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, HPLC of Formula: 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Mikesell, Logan published the artcileStepwise PEG synthesis featuring deprotection and coupling in one pot, Application of 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is polyethylene glycol deprotection coupling one pot synthesis; PEG; base-labile; monodisperse; polyethylene glycol; protecting group.

The stepwise synthesis of monodisperse polyethylene glycols (PEGs) and their derivatives usually involves using an acid-labile protecting group such as DMTr and coupling the two PEG moieties together under basic Williamson ether formation conditions. Using this approach, each elongation of PEG is achieved in three steps – deprotection, deprotonation and coupling – in two pots. Here, we report a more convenient approach for PEG synthesis featuring the use of a base-labile protecting group such as the phenethyl group. Using this approach, each elongation of PEG can be achieved in two steps – deprotection and coupling – in only one pot. The deprotonation step, and the isolation and purification of the intermediate product after deprotection using existing approaches are no longer needed when the one-pot approach is used. Because the stepwise PEG synthesis usually requires multiple PEG elongation cycles, the new PEG synthesis method is expected to significantly lower PEG synthesis cost.

Beilstein Journal of Organic Chemistry published new progress about Coupling reaction. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Application of 2,5,8,11-Tetraoxatridecan-13-ol.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Price, Terry L. published the artcileIon Conducting ROMP Monomers Based on (Oxa)norbornenes with Pendant Imidazolium Salts Connected via Oligo(oxyethylene) Units and with Oligo(ethyleneoxy) Terminal Moieties, Name: 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is ion conducting ROMP monomer oxanorbornene imidazolium oxyethylene ethyleneoxy.

A matrix of 22 two-armed norbornene-based imidazolium TFSI monomers (8) was synthesized to determine the optimal structure in terms of single ion conductivity For the chain tethering the imidazolium ring to the norbornene ring three or four oxyethylene units are optimal. A terminal group of two ethyleneoxy units was optimal. NMR studies indicated that both the tether oxyethylene units and the terminal ethyleneoxy units interact with the imidazolium cation via hydrogen bonding. 8r (X = 4, Y = 2) exhibited a conductivity of 9.57 × 10-5 S/cm at 25 °C and a Tg of -46 °C. Low Tg values do not correlate with higher conductivity as a result of the H-bonding interactions. Stability toward autopolymn. and reasonable conductivities provide an acceptable platform for ion conducting ROMP polymers. Four one-armed norbornene-based imidazolium TFSI monomers (15) were prepared with tetra(ethyleneoxy) linkers/spacers and variable terminal groups. All of these exhibited low Tgs (<-55 °C) and room temperature conductivities >10-4 S/cm, the highest being 4.39 × 10-4 S/cm for 15c (Tg = -69 °C), the analog of 8r, providing hope for outstanding polymers. Three oxanorbornene-based two-armed imidazolium TFSI monomers (18) were prepared with varied linkers and terminal groups. 18b possesses a room temperature conductivity of 1.2 × 10-4 S/cm, again augering well for polymers derived therefrom by ROMP.

Macromolecules (Washington, DC, United States) published new progress about Ionic conductivity. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Name: 2,5,8,11-Tetraoxatridecan-13-ol.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kim, Dowan published the artcileControlled Phase Separation in Poly(p-phenyleneethynylene) Thin Films and Its Relationship to Vapor-Sensing Properties, Recommanded Product: 2,5,8,11-Tetraoxatridecan-13-ol, the main research area is phase separation polyphenyleneethynylene thin film vapor sensing porous.

In this paper, we report the synthesis and mesoporous film formation of hydrophobic rodlike poly(p-phenyleneethynylene)s (PPEs) (I) and present porosity-dependent quenching studies using 1,3,5-trinitrotoluene (TNT) vapors. Nonsolvent vapor-induced phase separation was used to induce pore formation during film casting, and the concentration of PPEs in the casting solution was controlled carefully to prevent excimer formation. We found that the structures of the sidechains of the PPEs strongly influence the range of relative humidity at which controlled pore generation occurs, which could be rationalized from interfacial energies calculated from contact angle measurements. Porosity of the PPE films resulted in increased efficiency of fluorescence quenching toward TNT vapors, which previously required very thin films (below 5 nm) for sensing applications. The control of the porous structure as well as film thickness constitutes a promising strategy for enhancing the efficiency of chemosensors and in more general applications requiring fine-tuned polymer-gas interactions.

Langmuir published new progress about Films (Mesoporous). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Recommanded Product: 2,5,8,11-Tetraoxatridecan-13-ol.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Ohayon, David published the artcileInfluence of Side Chains on the n-Type Organic Electrochemical Transistor Performance, HPLC of Formula: 23783-42-8, the main research area is side chain organic electrochem transistor; electron mobility; n-type polymers; organic bioelectronics; organic electrochemical transistor; side chain.

N-Type (electron transporting) polymers can make suitable interfaces to transduce biol. events that involve the generation of electrons. However, n-type polymers that are stable when electrochem. doped in aqueous media are relatively scarce, and the performance of the existing ones lags behind their p-type (hole conducting) counterparts. Here, the authors report a new family of donor-acceptor-type polymers based on a naphthalene-1,4,5,8-tetracarboxylic-diimide-bi-thiophene (NDI-T2) backbone where the NDI unit always bears an ethylene glycol (EG) side chain. The authors study how small variations in the side chains tethered to the acceptor as well as the donor unit affect the performance of the polymer films in the state-of-the-art bioelectronic device, the organic electrochem. transistor (OECT). First, substitution of the T2 core with an electron-withdrawing group (i.e., methoxy) or an EG side chain leads to ambipolar charge transport properties and causes significant changes in film microstructure, which overall impairs the n-type OECT performance. Thus the best n-type OECT performer is the polymer that has no substitution on the T2 unit. Next, the authors evaluate the distance of the oxygen from the NDI unit as a design parameter by varying the length of the C spacer placed between the EG unit and the backbone. The distance of the EG from the backbone affects the film order and crystallinity, and thus, the electron mobility. Consequently, work reports the best-performing NDI-T2-based n-type OECT material to date, i.e., the polymer without the T2 substitution and bearing a 6-C spacer between the EG and the NDI units. Work provides new guidelines for the side-chain engineering of n-type polymers for OECTs and insights on the structure-performance relations for mixed ionic-electronic conductors, crucial for devices where the film operates at the aqueous electrolyte interface.

ACS Applied Materials & Interfaces published new progress about Electric conductors. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, HPLC of Formula: 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zhang, Lei published the artcilePhotoregulative phase change biomaterials showing thermodynamic and mchanical stabilities, Quality Control of 23783-42-8, the main research area is photoregulative phase change biomaterial thermodn mchanical stability.

Azobenzenes are great photochromic mols. for switching the phys. properties of various materials via trans-cis isomerization. However, the UV light resulted cis-azobenzene is metastable and thermodynamically gets back to trans-azobenzene after ceasing UV irradiation, which causes an unwanted property change of azobenzene-containing materials. Addnl., thermal and mech. conditions would accelerate this process dramatically. In this present work, a new type of azobenzene-containing surfactant is designed for the fabrication of photoresponsive phase change biomaterials. With a “”locked”” cis-azobenzene conformation, the resulting biomaterials could maintain their disordered state after ceasing UV light, which exhibit great resistance to thermal and piezo conditions. Interestingly, the “”locked”” cis-azobenzene could be unlocked by Vis light in high efficiency, which opens a new way for the design of phase change materials only responding to light. By showing stable cis-azobenzene maintained phys. state, the newly fabricated biomaterials provide new potential for the construction of advanced materials, like self-healing materials, with less use of long time UV irradiation for maintaining their disordered states.

Nanoscale published new progress about Biological materials. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Quality Control of 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Shibuya, Yoshiki published the artcileBrush-First ROMP of poly(ethylene oxide) macromonomers of varied length: impact of polymer architecture on thermal behavior and li+ conductivity, Quality Control of 23783-42-8, the main research area is ROMP polyoxyethylene macromonomer polynorbornene architecture thermal ionic conductivity; polymer electrolyte solid battery polyoxyalkylene polyalkenamer bottlebrush; ring opening metathesis polymerization polyethylene oxide macromonomer norbornene.

The properties of polymeric materials are dictated not only by their composition but also by their mol. architecture. Here, by employing brush-first ring-opening metathesis polymerization (ROMP), norbornene-terminated poly(ethylene oxide) (PEO) macromonomers (MM-n, linear architecture), bottlebrush polymers (Brush-n, comb architecture), and brush-arm star polymers (BASP-n, star architecture), where n indicates the average d.p. (DP) of PEO, are synthesized. The impact of architecture on the thermal properties and Li+ conductivities for this series of PEO architectures is investigated. Notably, in polymers bearing PEO with the highest d.p., irresp. of differences in architecture and mol. weight (∼100-fold differences), electrolytes with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) as an Li+ source exhibit normalized ionic conductivities (σn) within only 4.9 times difference (σn = 29.8 × 10-5 S cm-1 for MM-45 and σn = 6.07 × 10-5 S cm-1 for BASP-45) at a concentration of Li+ r = [Li+]/[EO] = 1/12 at 50 °C. © 2018 Wiley Periodicals, Inc.J. Polym. Sci., Part A: Polym.Chem. 2018.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Battery electrolytes. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Quality Control of 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Yang, Hongfen published the artcileA Modular Synthetic Route Involving N-Aryl-2-nitrosoaniline Intermediates Leads to a New Series of 3-Substituted Halogenated Phenazine Antibacterial Agents, Application In Synthesis of 23783-42-8, the main research area is halogenated phenazine preparation nitrosoaniline infection antibacterial SAR.

Pathogenic bacteria demonstrate incredible abilities to evade conventional antibiotics through the development of resistance and formation of dormant, surface-attached biofilms. Therefore, agents that target and eradicate planktonic and biofilm bacteria are of significant interest. We explored a new series of halogenated phenazines (HP) through the use of N-aryl-2-nitrosoaniline synthetic intermediates that enabled functionalization of the 3-position of this scaffold. Several HPs demonstrated potent antibacterial and biofilm-killing activities (e.g., HP I, against methicillin-resistant Staphylococcus aureus: MIC = 0.075μM; MBEC = 2.35μM), and transcriptional anal. revealed that HPs II, III, and I induce rapid iron starvation in MRSA biofilms. Several HPs demonstrated excellent activities against Mycobacterium tuberculosis (HP 34, MIC = 0.80μM against CDC1551). This work established new SAR insights, and HP I demonstrated efficacy in dorsal wound infection models in mice. Encouraged by these findings, we believe that HPs could lead to significant advances in the treatment of challenging infections.

Journal of Medicinal Chemistry published new progress about Antibacterial agents. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Application In Synthesis of 23783-42-8.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kosco, Jan published the artcileOligoethylene Glycol Side Chains Increase Charge Generation in Organic Semiconductor Nanoparticles for Enhanced Photocatalytic Hydrogen Evolution, Related Products of ethers-buliding-blocks, the main research area is conjugated polymer glycolation organic semiconductor nanoparticle photocatalytic hydrogen evolution; hydrogen; nanoparticles; organic semiconductors; photocatalysts; solar fuels.

Organic semiconductor nanoparticles (NPs) composed of an electron donor/acceptor (D/A) semiconductor blend have recently emerged as an efficient class of hydrogen-evolution photocatalysts. It is demonstrated that using conjugated polymers functionalized with (oligo)ethylene glycol side chains in NP photocatalysts can greatly enhance their H2-evolution efficiency compared to their nonglycolated analogs. The strategy is broadly applicable to a range of structurally diverse conjugated polymers. Transient spectroscopic studies show that glycolation facilitates charge generation even in the absence of a D/A heterojunction, and further suppresses both geminate and nongeminate charge recombination in D/A NPs. This results in a high yield of photogenerated charges with lifetimes long enough to efficiently drive ascorbic acid oxidation, which is correlated with greatly enhanced H2-evolution rates in the glycolated NPs. Glycolation increases the relative permittivity of the semiconductors and facilitates water uptake. Together, these effects may increase the high-frequency relative permittivity inside the NPs sufficiently, to cause the observed suppression of exciton and charge recombination responsible for the high photocatalytic activities of the glycolated NPs.

Advanced Materials (Weinheim, Germany) published new progress about Charge transfer state. 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Related Products of ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Piszel, Paige E. published the artcileOxidative Amide Coupling from Functionally Diverse Alcohols and Amines Using Aerobic Copper/Nitroxyl Catalysis, Category: ethers-buliding-blocks, the main research area is amide preparation; amine alc oxidative coupling copper ABNO catalyst; aerobic oxidation; amide coupling; copper; cross-coupling; homogeneous catalysis.

The aerobic Cu/ABNO catalyzed oxidative coupling of alcs. and amines was highlighted in the synthesis of amides e.g. I in diverse drug-like mols. (ABNO = 9-azabicyclo[3.3.1]nonane N-oxyl). The robust method leverages the privileged reactivity of alcs. bearing electroneg. hetero- atoms (O, F, N, Cl) in the Β-position. The reaction tolerated over 20 unique functional groups and was demonstrated on a 15 mmol scale under air. Steric constraints of the catalyst allowed for chemoselective amidation of primary amines in the presence of secondary amines. All catalyst components were com. available, and the reaction proceeded under mild conditions with retention of stereocenters in both reaction partners, while producing only water as a byproduct.

Angewandte Chemie, International Edition published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 23783-42-8 belongs to class ethers-buliding-blocks, name is 2,5,8,11-Tetraoxatridecan-13-ol, and the molecular formula is C9H20O5, Category: ethers-buliding-blocks.

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem