Liquid crystals with 1,3,4-oxadiazole units in the aromatic core have attracted considerable attention due to their rich mesophases, high photoluminescence quantum yields, good electron transporting ability and excellent thermal stabilities. In this feature article, 1,3,4-oxadiazole-based liquid are classified into three categories according different molecular shapes weight: calamitic discotic monomers, symmetric non-symmetric dimers, polymers including main-chain, side-chain...

A new chemosensor, 2,3,15,16-tetrakis(pyridin-2-yl)-7,8,10,11,20,21,23,24-octahydro[1,4,7,10,13,16]hexaoxacyclooctadecino[2,3-g:11,12-g']diquinoxaline (1), containing 2,3-bis(pyridin-2-yl)quinoxaline and crown ether moieties, has been designed found to be a ratiometric selective fluorescent detector of Zn(2+) over wide range tested metal ions. The addition the solution 1 in acetonitrile induced formation 1:2 ligand-metal complex, 1-Zn(2+), which exhibits remarkable enhanced emission centered...

Regulating Lewis acid-base sites in catalysts to investigate their influence the chemical fixation of CO2 is significant but challenging. A metal-organic framework (MOF) with open metal Co sites, {(NH2 Me2 )[Co3 (μ3 -OH)(BTB)2 (H2 O)]⋅9 H2 O⋅5 DMF}n (1), was obtained and results catalytic investigation show that 1 can catalyze cycloaddition aziridines give 99 % yield. The efficiency cyclization propargyl amines only 32 %. To improve ability 1, ligand XN base introduced into coordinated...

Abstract Aromatic tertiary amines are one of the most important classes organic compounds in chemistry and drug discovery. It is difficult to efficiently construct from primary via classical nucleophilic substitution due consecutive overalkylation. In this paper, we have developed a radical tandem C-N coupling strategy aromatic commercially available carboxylic acids nitroarenes. A variety can be furnished good yields (up 98%) with excellent functional group compatibility under mild reaction...

As an important organic photofunctional material, spirooxazine (SO) usually does not exhibit photochromism in the solid state since intermolecular π-π stacking impedes photoisomerization. Developing photochromic SO is crucial for practical applications but still full of challenges. Here, a series derivatives (SO1-SO4) with bulky aromatic substituents at 4- and 7-positions skeleton, which provide them large volume to undergo solid-state under mild conditions, designed synthesized. All...

Selective defluorinative functionalization of trifluoromethyl group (-CF3) is an attractive synthetic route to the pharmaceutically privileged fluorine-containing moiety. Herein, we report a strategy based on photoexcited copper catalysis activate C-F bond di- or trifluoromethylated arenes for divergent radical C-N coupling with carbazoles and aromatic amines. The use different ligands can tune reaction products diversity. A range substituted, structurally diverse α,α-difluoromethylamines be...

The enormous and widespread use of organoboronic acids has prompted the development innovative synthetic methodologies to meet demands on structural diversity functional group tolerance. existing photoinduced defunctionalization radical borylation, typically focused conversion one C-X bond (X= Br, I, or other leaving group) into only C-B bond. Herein, we disclose a divergent dechloroborylation reaction enabled by dinuclear gold catalysis with visible light irradiation. A wide range...

In this work, three polyimides (PIs) are successfully synthesized by the condensation reaction of an aromatic triamine with difunctional dianhydrides. These materials show electrochemical lithium ion storage properties as cathodes for lithium-ion batteries. The dianhydride monomers found to have significant effects on their performances. addition, polymer PI-1 shows narrow micropore size distributions and selective adsorption CO2 over CH4 N2. Furthermore, exhibits a high Qst value (11.7 kJ...

Selective deuteration of unactivated C(sp3)-H bonds is a highly attractive but challenging subject research in pharmaceutical chemistry, material science and synthetic chemistry. Reported herein practical, selective economical efficient hydrogen/deuterium (H/D) exchange by synergistic photocatalysis hydrogen atom transfer (HAT) catalysis. With the easily prepared PMP-substituted amides as nitrogen-centered radical precursors, wide range structurally diverse can undergo predictable H/D...

The synthesis and application of promising polymeric materials–pillararene-based conjugated porous polymers–are discussed summarized in this review.

Abstract A dicationic platinum(II) terpyridyl complex, [( t Bu 3 tpy)Pt(OXD)Pt( tpy)](PF 6 ) 2 ( tpy=4,4′,4“‐tri‐ tert ‐butyl‐2,2′:6′,2”‐terpyridyl, OXD=2,5‐bis(4‐ethynylphenyl)[1,3,4]oxadiazole) formed phosphorescent organogels in acetonitrile or a mixture of and alcohol. The structure properties these emissive gels were analyzed by polarizing optical confocal laser scanning microscopy, variable‐temperature 1 H NMR, UV/Vis, emission spectroscopy. Dry studied electron powder X‐ray...

Deep eutectic solvents (DESs) have been intensively investigated as promising green for extraction combined with oxidative desulfurization (EODS) of fuel oil. However, it is still a challenge to explore the effect hydrogen bond acceptor (HBA) and donor (HBD) structure on formation DESs performance desulfurization. In this study, exploratory density functional theory (DFT) calculation was first carried out reveal influence electron HBA preparation DES. Then, structures were optimized, their...

The carbene-like reactivity of the Kukhtin–Ramirez adduct enables first reductive intramolecular cyclopropanation, which provides easy access to highly functionalized cyclopropane-fused heterocycles.

Abstract Functional group translocation is undoubtedly a pivotal synthetic transformation in organic chemistry. Numerous types of reactions involving radical 1,2‐aryl or 1,4‐aryl migration via electron transfer mechanism have been extensively investigated. Nevertheless, energy‐transfer enabled 1,4‐arylation remains unknown. Herein we disclose that an unprecedented di‐π‐ethane rearrangement featuring facilitated by energy catalysis under visible light conditions. The newly developed mild...

The synthesis and spectroscopic properties of trans-[RuL4(C[triple bond]CAr)2] (L4 = two 1,2-bis(dimethylphosphino)ethane, (dmpe)2; 1,5,9,13-tetramethyl-1,5,9,13-tetraazacyclohexadecane, 16-TMC; 1,12-dimethyl-3,4:9,10-dibenzo-1,12-diaza-5,8-dioxacyclopentadecane, N2O2) are described. Investigations into the effects varying [RuL4] core, acetylide ligands, chain length for [(-)C[triple bond]C(C6H4C[triple bond]C)(n-1)Ph] bond]C(C6H4)(n-1)Ph] (n 1-3) series upon electronic electrochemical...