The elaborately designed π-electron-rich fluorescent ligand 1,4-bis(1-carboxymethylene-4-imidazolyl)benzene (H2L), possessing bifunctional groups including the carboxylate (building units) and 4-imidazoyl (N-donor potential active sites) has been employed to construct coordination polymers. A luminescent sensor, namely [Cd(L)(phen)2]·5H2O (1), was obtained, which a one-dimensional structure. material shows blue emission maximum at 457 nm with luminescence lifetime of 488 ns quantum yield...

By using diazonaphthoquinones and anilines as key reagents through a point-to-axis chiral transfer strategy, the atroposelective synthesis via asymmetric C(sp2 )-H bond insertion reaction of arenes has been realized under rhodium catalysis, providing resulting biaryl atropisomers in moderate to excellent yields with good enantiomeric ratios (up 99:1). Further elaboration indicates this type axially scaffold may have promising potentials developing novel ligands.

Self-stabilized precipitation (2SP) polymerization, a powerful tool for synthesizing and functionalizing uniform polymeric microspheres, is commonly applied in the heterogeneous copolymerization of olefinic compounds with maleic anhydride (MAH). In present work, we exploited 2SP polymerization vinyl chloride monomer (VCM) MAH using bis(4-tert-butylcyclohexyl) peroxydicarbonate (TBCP) as initiator an isoamyl acetate/n-hexane binary mixture solvent. The effects conditions such solvent...

In recent years, monodisperse functional polymer particles have attracted intensive attention due to their promising prospects in numerous application fields. Herein, polymaleimide (PMI) microspheres with excellent thermal stability and a high glass transition temperature were facilely prepared by self-stabilized precipitation polymerization (2SP) of maleimide. The effects the reaction medium, monomer initiator concentrations, temperature, cross-linker dosage on size morphology as-prepared...

This contribution reported the radical copolymerization of vinyl acetate (VAc) with carboxylates bearing branched C7–C9 chains, including neononanoate (VV-9), neodecanoate (VV-10), and 2-ethylhexanoate (VV-EH), VAc units as-prepared copolymers were subsequently hydrolyzed to alcohol in a base medium. With reactivity ratios r1 = 0.94 (VV-9) r2 0.96 (VAc), VV-9 demonstrates an ideal azeotropic copolymerization. By simply adjusting initial feed ratios, terpolymers VV-9, VAc, (PVVOH) different...

BiOF is considered as a potential excellent solid electrolyte for fluoride ion batteries due to its special layered structure.

The rhodium(I)-catalyzed reaction of alkynes with arylboronic acids in the presence formaldehyde resulted a carbon monoxide gas-free carbonylative arylation to yield α,β-enones. simultaneous loading phosphine-ligated and phosphine-free rhodium(I) complexes is required for efficient catalysis, which catalyze abstraction carbonyl moiety from (decarbonylation) its subsequent introduction into substrate (carbonylation), respectively.

The accurate and sensitive detection of active biotoxin proteins the determination their kinetics are vital for upsurge chemical attacks but still limited. Herein, we report a liquid chromatography-tunable ultraviolet spectroscopic-quadrupole mass spectrometric (LC-TUV-QDa) method ricin. This has advantage quantification ricin in decreased oligonucleotide (oligo) substrates as well produced adenine, which QDa offers confirmative evidence oligo adenine products. We invented strong cation...

Castor bean or ricin-induced intoxication terror events have threatened public security and social safety. Potential resources materials include beans, raw extraction products, crude toxins, purified ricin. The traceability of the origins castor beans is thus essential for forensic anti-terror investigations. As a new imaging technique with label-free, rapid, high throughput features, matrix-assisted laser desorption ionization mass spectrometry (MALDI-MSI) has been gradually stressed in...

Abstract By using diazonaphthoquinones and anilines as key reagents through a point‐to‐axis chiral transfer strategy, the atroposelective synthesis via asymmetric C(sp 2 )−H bond insertion reaction of arenes has been realized under rhodium catalysis, providing resulting biaryl atropisomers in moderate to excellent yields with good enantiomeric ratios (up 99:1). Further elaboration indicates this type axially scaffold may have promising potentials developing novel ligands.

Herein, we describe experimental and computational studies to understand the features of oxycyanopyridinium ylides generated in situ from oxy-cyanopyridines rhodium carbene. This chemistry has enabled concomitant formation both C-N C-C bonds, providing a complementary approach for cyanation reactions. Density functional theory calculations indicate sequential metal-bound ylide formation, rhodium-associated five-membered transition state, 1,4-cyano group relocation. Moreover, enantioselective...

In the title Schiff base mol-ecule, C(13)H(9)BrClN, dihedral angle between benzene rings is 49.8 (2)° and mol-ecule has an E configuration about C=N bond. crystal, there are no directional interactions but only van der Waals inter-molecular inter-action forces neighbouring mol-ecules.

Snake venom is a complex mixture secreted from the glands of poisonous snakes， which contains proteins， peptides， lipids， nucleosides， sugars， amino acids， amines， metal ions， and other components. According to toxicological classification， snake venoms can be classified as neurotoxins， anticoagulants procoagulant toxins， cardiac toxin enzymes. Proteins peptides are key components venom. The establishment rapid， accurate analysis identification methods for proteins in prerequisite...

The highly toxic plant toxin ricin is one of the most known threatening toxins. Accurate and sensitive biosensing methods for first emergency response intoxication treatment, are always pursued in biodefense field. Screening affinity molecules fundamental mainstream approach developing methods. Compared with common such as antibodies oligonucleotide aptamers, peptides have great potential modules more accessible chemical synthesis capability better batch-to-batch stability than antibodies,...

Abstract The rhodium(I)-catalyzed reaction of alkynes with aryl­boronic acids in the presence formaldehyde results a CO-gas-free arylative dual-carbonylation to produce γ-butenolide derivatives. simultaneous loading phosphine-ligated and phosphine-free rhodium(I) complexes is required for efficient catalysis. former complex catalyzes abstraction carbonyl moiety from through activation its formyl C–H bond (decarbonylation) latter subsequent dual-incorporation resulting unit (carbonylation)....