The ability of a cyclic halogen-bonded network to bind a metal ion is explored using M–(BrZ)4 complexes (M = Li+, Na+, or Mg2+; Z = F or NH2). Binding is characterized by bond paths connecting the metal ion with each one of the bromine atoms in the host, and orthogonal to the Br…Z interactions...

Structures have been optimised using ab initio molecular orbital calculations for cyclic ions 1 and β-substituted ions 2 where R1 and R2 are the three possible combinations of H and CH3 and Z is NH2, PH2, AsH2, OH, SH and SeH. The 3–21G basis set was used for ions with Z = NH2, OH, SH, and PH2...

The electronic excitation and infrared (IR) spectra of a capped tri-peptide, Z-PLG-NH2 (Z = benzyloxycarbonyl, P = Pro, L = Leu, G = Gly), were measured in the gas phase by using the laser desorption supersonic jet technique. By measuring an ultraviolet–ultraviolet hole burning spectrum, it was...

A novel photoelectrochemical (PEC) bioassay protocol for diethylstilbestrol (DES) was systematically proposed. The Au/UiO-66(NH2) hybrid with countless active sites was fabricated using an in situ reduction strategy and was subsequently decorated with CdS nanoparticles (NPs) by a sequential chem...

A novel ternary heterojunction [email protected](NH2)@g-C3N4 ([email protected]) was synthesized by in-situ solvothermal-hydrothermal approach, showing superior photocatalytic degradation of RhB and TC under visible-light irradiation. The optimal [email protected] composite exhibits the highest ...

A small co-catalyst library of amino thioureas has been established from chiral 1,3-diamines. These bifunctional thioureas can form assemblies with proline to cooperatively catalyze the asymmetric Michael addition of aldehydes to nitroolefins. Both the reaction rate (up to 98% yield for 18 h) an...

A simple and selective method is developed for the extraction spectrophotometric determination of ruthenium(III) using o-methylphenyl thiourea (OMPT) as a chromogenic chelating ligand. The basis of the proposed method is ruthenium(III)–OMPT complex formation in aqueous hydrochloric acid media (...

An efficient method for enantioselective synthesis of β-nitrophosphonates via the Michael addition of diphenyl phosphite to nitroalkenes using the readily available quinidine thiourea organocatalyst has been developed. The desired β-nitrophosphonates were obtained in good ee values. Molecular ...

Alzheimer’s disease (AD) is a neurodegenerative disorder associated with an excessive accumulation of amyloid-beta peptide (Aβ). Based on the multifactorial nature of AD, preparation of multi-target-directed ligands presents a viable option to address more pathological events at one time. A no...

A series of 28 aryl- and alkyl-substituted isothiouronium salts were readily synthesized in high yields through the reaction of allylic bromides with thiourea, N-monosubstituted thioureas or thiosemicarbazide. The S-allylic isothiouronium salts substituted with aliphatic groups were found to be ...

A series of pyrano[4,3-b]pyran derivatives have been synthesized in excellent yields by the reaction of aromatic aldehydes with malononitrile or cyanoacetate and 4-hydroxy-6-methylpyran-2-one in water at 80 °C, with the transformation being catalyzed by an aqueous solution of thiourea dioxide (...

Trivalent rhodium was determined spectrophotometrically as its 1:2 rhodium o-methylphenyl thiourea (OMPT) complex, extracted into chloroform from aqueous acetate buffer media at pH 5.4. The complex exhibits maximum absorption at 320 nm (Molar absorptivity 9.76 × 103 L mol−1 cm−1), Sandell’s se...

Infrared and Raman spectra of NCCSN(CH3)2(DMCTF) have been measured, and the fundamental vibration frequencies have been proposed and discussed in terms of the potential energy distribution. A generalised valence force field and force constants comparable with those of other simple tertiary thio...

The infrared and Raman spectra of NCCON(CH3)2 are given and the fundamental frequencies have been assigned and discussed in terms of the potential energy distribution. The force constants have been obtained using a valence force field.

This study aimed to investigate the ability of the novel materials D-α-tocopheryl poly(2-ethyl-2-oxazoline) succinate (TPOS) to construct pH-sensitive liposomes. TPOS was initially synthesized and characterized by TLC, FTIR, and 1H-NMR. The buffering capacity of polyethylene glycol- distearoyl ...

The catalytic action of 4-(dimethylamino)pyridine (DMAP) in lactonizing 4-hydroxy-2-methylenebutanoate esters to 2-methylene-γ-butyrolactones is described. The use of DMAP, which functions as an excellent complement to the more traditional acid-catalyzed lactonization protocol, allows for the s...

For the first time, polyelectrolyte complex based on poly[(2-dimethylamino) ethyl methacrylate] (PDMAEMA) and chondroitin sulfate (CS) was prepared. The properties of novel material and precursors were investigated by WAXS, FTIR, TGA, SEM and DLS analysis. The PDMAEMA/CS PECs presented hydrophil...

3-(2-Chloroalkyl)-2,2-dihaloaziridines were synthesized via cycloaddition of dihalocarbenes to the CN double bond of β-chloroimines. Under the action of Lewis acids or HCl, N–C3 bond cleavage occurred, giving rise to N-substituted 2,4-dichloro-3,3-dimethylbutanamides, which were further conver...

The Pd-catalyzed trans-selective monoalkynylation of 1,1-dihalo-1-alkenes with XZnCCSiMe3, where X is Br or Cl, can proceed generally in excellent yields in the presence of Pd(DPEphos)Cl2 or Pd(dppf)Cl2, and subsequent alkylation with methyl- and ethylzincs can proceed in excellent yields with ≥...

A systematic study of silver ion electrodeposition at the surface of silver nitrate solutions coated by dihexadecyl phosphate (DHP) Langmuir films is presented. We study the morphology of the deposits and their growth rates, under potentiostatic conditions, as a function of several physical and ...