Covalent organic frameworks (COFs) offer ordered π structures that are useful for developing light-emitting materials. However, most COFs weak in luminescence. Here we report the conversion of less emissive into materials via a pinpoint surgery on pore walls. Deprotonation N-H bond to form an anionic nitrogen species hydrazone linkage can eliminate nitrogen-related fluorescence quenching pathway. The resulting COF enhances linear proportion progress deprotonation, achieving 3.8-fold improved...

Abstract A dendron‐substituted tetraphenylethene low molecular weight gelator (LMWG)compound, LMWG 1, is designed and investigated. Gelation‐induced fluorescence enhancement observed for the gel based on 1 its can be reversibly tuned by varying temperature of ensemble. The photoinduced energy‐transfer occur between PI 2 (perylene diimide) in phase, but it cannot corresponding solution. emission color from cyan, yellow, to red concentration . By taking advantage photochromic transformation...

A new poly(benzyl ether) dendritic organogelator Azo-G3 containing azobenzene in its inner layer was designed and synthesized, fully characterized. The dendron found to be a highly efficient versatile toward various apolar polar organic solvents with the critical gelation concentrations (CGCs) approaching 0.05 wt %, indicating that belongs category of supergelators. Further studies revealed intermolecular multiple π–π stacking interactions might responsible for guiding self-assembly...

The transition metal complexes containing chiral phosphorus ligands are the most widely and successfully used catalysts in asymmetric hydrogenation of unsaturated compounds. However, a major problem associated with these homogeneous catalytic systems is separation recycling often expensive easily oxidized catalysts. In addition, many reactions still lack efficient catalysts, stereoselectivities substrate-dependent. Therefore, development highly effective recyclable desirable. Over past few...

Circularly polarized luminescent materials play an increasingly important role in display equipment and optical apparatuses. Herein, we design synthesize a kind of liquid crystalline polymer with both chirality aggregation-induced emission groups, namely, poly(4-cholesterol formate-oxygen-tetraphenylethylene-methacrylate) (PT-Chol). Polarized light microscopy X-ray scattering results show that the forms layered structure. Because existence tetraphenylethylene luminogen, shows highly...

Past decades have witnessed the rapid development of conjugated polymers because their promising semiconducting properties and applications in organic field-effect transistors (OFETs). Recent studies shown that side-chain engineering is an efficient strategy to increase performance. This Perspective focuses on modulation evaluating effects performance OFETs. The challenges potential functional high-performance OFETs through are also discussed.

We report light gating in synthetic one-dimensional nanochannels of stable crystalline porous covalent organic frameworks. The frameworks consist 2D hexagonal skeletons that are extended over the

Abstract The synthesis, self‐assembly, and spectroscopic investigations of spiropyran (SP)‐functionalized dendron 1 are reported. Under UV light irradiation, assembly into nano‐/microparticles occurs due to the transformation closed form SP open merocyanine (MC) form. formation these is confirmed by transmission electron microscopy (TEM) dynamic scattering (DLS) experiments in addition confocal laser scanning (CLSM) measurements. These exhibit relatively strong red emission. It interesting...

A series of poly(benzyl ether) dendrons, up to the fourth generation, decorated in their periphery with dimethyl esters were divergently synthesized and fully characterized. These dendrons found be unprecedented highly efficient organogelators toward various aromatic polar organic solvents critical gelator concentration (CGC) approaching 2.2 mg/mL. The gelation ability was dependent on nature peripheral groups, dendron dendritic architecture. large monodisperse G4 a globular shape could also...

A new highly efficient and versatile poly(benzyl ether) dendritic organogelator HPB-G1 with 2-(2'-hydroxyphenyl)benzoxazole (HPB) at the focal point has been designed synthesized. can form stable organogels toward various apolar polar organic solvents. Further studies revealed that intermolecular multiple π-π stacking interactions are main driving forces for formation of organogels. Notably, dendron exhibited a significantly enhanced emission in gel state contrast to weak solution. Most...

Abstract Asymmetric C(sp)C(sp 2 ) bond formation to give enantiomerically enriched 1,3‐butadienyl‐2‐carbinols occurred through a homoallenylboration reaction between 2,3‐dienylboronic ester and aldehydes under the catalysis of chiral phosphoric acid (CPA). A diverse range butadiene‐substituted secondary alcohols with aryl, heterocyclic, aliphatic substituents were synthesized in very high yield enantioselectivity. Preliminary density functional theory (DFT) calculations suggest that...

An efficient strategy using Rh(I)-catalyzed [(3 + 2) 1] cycloaddition of 1-ene-vinylcyclopropane and CO as a key step to build the cis-hydrodibenzofuran skeleton has been developed applied for formal synthesis (±)-galanthamine (±)-lycoramine.

Abstract Presented herein is the first direct alkylation and hydroxylation reaction between two different C(sp 3 )−H bonds, indolin‐2‐ones alkyl‐substituted N‐heteroarenes, through an oxidative cross‐coupling reaction. The catalyzed by a simple iron salt under mild ligand‐free base‐free conditions. environmentally benign, employs air (molecular oxygen) as terminal oxidant oxygen source for synthesis of O‐containing compounds, produces only water byproduct.

A new kind of amphiphilic DNA-dendron hybrid consisting a highly hydrophobic dendron and single stranded DNA is synthesized. The could assemble into long nanofibers in aqueous phase. hybridization property at the shell fibers associated with encapsulation ability inner core enable further functionalization, offering unique class supramolecular building block.

Abstract A new class of poly(aryl ether) dendritic ligands containing a pyridine functionality at the focal point and corresponding Ag I complexes through metal–ligand coordination were designed, synthesized, fully characterized. Compared with ligands, exhibited much better gelation ability for various organic solvents very low critical concentrations. The gel–sol phase transition temperatures morphologies could be finely tuned by binding silver ion to ligand. preliminary study revealed that...

Abstract Dendrons and dendrimers have well‐defined, discrete structures that can be precisely controlled at the molecular lever. Owing to their unique architectures multiple functionalities, dendritic molecules shown intensive self‐assembly behavior functional performance. In particular, they been promising candidates for applications in assembly of gel‐phase materials. Furthermore, introduction suitable moieties into core, branches, and/or periphery gelators enables construction smart...

A convenient and straightforward method for the visual recognition of chloride ion has been established through a chloride-responsive dendritic organogel. The specificity was largely attributed to higher binding affinity gelator compared with other anions halogen bonding interactions.

Abstract Open 1D channels found in covalent organic frameworks are unique and promising to serve as pathways for proton conduction; how develop high‐rate yet stable transporting systems remains a substantial challenge. Herein, this work reports strategy exploring proton‐conducting by engineering pore walls installing proton‐containing polymers into the pores. Amide‐linked sulfonated were synthesized from imine‐linked precursors via sequentially oxidize amide linkages further anchor sulfonic...

Development of inhibitors to antagonize the activities antiapoptotic Bcl-2 family proteins is particular interest in cancer chemotherapy. We discovered a quinazoline-2(1H)-thione derivative (DCBL55) as new Bcl-x(L), Bcl-2, and Mcl-1 inhibitor by virtual database screening. systematically modified structure compound 1 chemical synthesis. The interactions compounds with Bcl-x(L) were predicted molecular modeling simulations, which confirmed structure-activity relationship analysis protein...

Spherical micelles and nanofibers assembled from an amphiphilic DNA-dendron hybrid can be reversibly achieved under optimum assembly conditions. The possible morphology transformation mechanism is proposed further confirmed by X-ray diffraction, TEM DLS experiments.

Abstract A new class of poly(benzyl ether) dendrimers, decorated in their cores with N‐Boc‐protected 1,2‐diphenylethylenediamine groups, were synthesized and fully characterized. It was found that the gelation capability these dendrimers highly dependent on dendrimer generation, second‐generation ( R , )‐G 2 DPENBoc proved to be a efficient organogelator. number experiments (SEM, TEM, FTIR spectroscopy, 1 H NMR rheological measurements, UV/Vis absorption CD, XRD) revealed dendritic molecules...