Multiple Fused Anthracenes as Helical Polycyclic Aromatic Hydrocarbon Motif for Chiroptical Performance Enhancement

Helical expansion : A novel helical structure consisting of three fused anthracene units was constructed by cycloisomerization. Enantiomers of the diphenyl derivative exhibited excellent chiroptical performance in the circular dichroism spectra and the circularly polarized luminescence spectra as simple organic molecules. Abstract Polycyclic...

6h

Highly Diastereoselective Synthesis of Polycyclic Indolines through Formal [4+2] Propargylic Cycloaddition of Indoles with Ethynyl Benzoxazinanones

A metal‐free formal [4+2] propargylic cycloaddition between aza‐o QMs, which is in situ generated from ethynyl benzoxazinanones assisted by a common Brønsted base, and simple indole derivatives has been developed. This method provides a convenient and practical access to a variety of single diastereoisomeric polycyclic indolines in excellent yields...

6h

Efficient Noble‐Metal‐Free Catalysts Supported by Three‐Dimensional Ordered Hierarchical Porous Carbon

Well‐defined heterogeneous catalysts with a three‐dimensional ordered hierarchical structure are constructed from nickel or cobalt nanoparticles embedded in porous carbon. On account of uniform distribution of nanoparticles in the porous carbon matrix and large diffusion channels that allow for effective mass transport, the catalysts exhibit superior...

6h

Enhancing magnetic cooperativity in Fe(II) triazole‐based spin‐crossover nanoparticles by pluronic matrix confinement

Polymeric one‐dimensional (1D) triazole‐based FeII spin crossover nanoparticles have been entrapped in pluronic P123 matrix, forming nanorods in which the interaction between host (P123) and guest (FeII complex) promoted high reproducibility of the spin crossover process, significant shifts of the transition temperatures (T↑ = 370 K, T↓ = 338 K for...

6h

Modulation of Crystal Packing via the Tuning of Peripheral Functionality for a Family of Dinuclear Mesocates

A family of four novel pyrazinyl‐hydrazone based ligands have been synthesized with differing functionality at the 5‐position of the central aromatic ring. Previous work has shown such ligands to form dinuclear triple mesocates which pack to form hexagonal channels capable of gas sorption. The effect of the peripheral functionality of the ligand on...

2d

A macrocyclic peptide library with a structurally constrained cyclopropane‐containing building block leads to thiol‐independent inhibitors of phosphoglycerate mutase

Here we report construction of an mRNA‐encoded library of thioether‐closed macrocyclic peptides by using an N ‐chloroacetyl‐cyclopropane‐containing exotic initiator whose structure is more constrained than the ordinary N ‐chloroacetyl‐α‐amino acid initiators. The use of such an initiator has led to a macrocycle library with significantly suppressed...

2d

Modulating the Properties of Azulene‐containing Polymers Through Functionalization at the 2‐Position of Azulene

Functionalization at the 2‐position of azulene molecules through directed C−H activation, followed by bromination, affords 1,3‐dibromo‐2‐arylazulenes, which undergo cross‐coupling polymerization with another suitable monomer to give azulene‐containing polymers. The polymer properties such as acid response and electrochromism are regulated by substitution...

2d

Regulation of Cathode‐Electrolyte Interphase via Electrolyte Additives in Lithium Ion Batteries

Electrolyte additive is an in‐situ protection for both the electrode and electrolyte. It is oxidized prior to the electrolyte and the oxidized decomposition can form a robust cathode‐electrolyte interphase (CEI) film on the surface of cathode, which inhibits the decomposition of the electrolyte and the dissolution of transition metals, thereby improving...

2d

Synthesis, structure, magnetic and photoluminescent properties of dysprosium(III) Schiff Base single‐molecule magnets: investigation of the relaxation of the magnetization

We report here the synthesis, structure, magnetic and photoluminescence properties of three new bifunctional Schiff‐base complexes [Dy(L1)2(py)2][B(Ph)4]·py (1), [Dy(L1)2Cl(DME)]·0.5DME (2) and [Dy(L2)2Cl]·2.5(C7H8) (3) (HL1 = Phenol, 2,​4‐​bis(1,​1‐​dimethylethyl)​‐​6‐​[[(2‐​methoxy‐​5‐​methylphenyl)​imino]​methyl]; HL2 = Phenol, 2,​4‐​bis(1,​1‐​dimethylethyl)​‐​6‐​[[(2‐​methoxyphenyl)​imino]​methyl])....

2d

Hyperbranched Poly(ester‐enamine) from Spontaneous Amino‐yne Click Reaction for Stabilization of Gold Nanoparticle Catalysts

Novel hyperbranched poly(ester‐enamine) (hb‐PEEa) was synthesized by the spontaneous amino‐yne click reaction of A2+B3 monomers. The amphiphilic PEG‐hb‐PEEa was used as surfactant for stabilization of Au nanoparticles (AuNPs). The PEG‐hb‐PEEa‐supported AuNPs nanocomposites (AuNPs@PEG‐hb‐PEEa) showed remarkable catalytic activity for catalytic reduction...

3d