Carbon-templated mesoporous ZSM-5 zeolites were synthesized directly avoiding a drying process. Carbon nanoparticles were simply mixed into synthesis precursor of ZSM-5 and hydrothermally treated by microwave irradiation. The amount of mesopores formed inside the ZSM-5 single crystals was contro...

The conformational study of the 2,3,4,5 tetrafluorobenzoic acid molecule (TFBA) was performed by density functional theory (DFT) using B3LYP functional with 6–311++G(d,p) basis set. Vibrational frequencies were calculated at the same level of theory for the optimized stable structure. The exist...

2,3,4,5-Tetrafluorobenzoic acid is an important pharmaceutical intermediate. A green technology for the decarboxylation of tetrafluorophthalic acid to 2,3,4,5-tetrafluorobenzoic acid in NH3-enriched high temperature liquid water (HTLW) was developed. Tetrafluorophthalic acid could undergo the de...

A series of triorganotin (IV) complexes with 2,3,4,5-tetrafluorobenzoic acid and mixed-ligands of the types: R3Sn(O2CC6HF4)m · L (m = 1, L = 0, R = Ph 1; m = 1, L = Ph3PO, R = Ph 4, Me 5), [R3Sn(O2CC6HF4)]m · L (m = 2, L = 4,4′-bipy, R = Ph 2, Me 3; m = n, L = 0, R = Me 6), and [R3Sn(O2CC6HF4...

A series of new organotin(IV) derivatives with 2,3,4,5-tetrafluorobenzoic acid: {[(2,3,4,5-F4C6HCO2)R2Sn]2O}2 (R = Et 1, n-Bu 2, Ph 3), [R2Sn(O2CC6F4H)2]n (R = n-Bu 4, Et 5, Ph 6), and Sn2R4(O2CC6F4H)3(OH) (R = Et 7, n-Bu 8, Ph 9), were synthesized by the reaction of diorganotin oxide and 2,3,4,...

A visible-light mediated approach to radical difluoromethylation of 3- and 3,5-substituted indoles was investigated using a readily synthesized difluoromethyl source, CF2HPPh3Br. Direct difluoromethylation of indoles in the two position is a rare feat in the literature. The reactions were conduc...

Cysteine residues on proteins can react with cellular oxidants such as hydrogen peroxide. While this process is important for scavenging excess reactive oxygen species, the products of this oxidation may also mediate cell signalling. To understand the role of cysteine oxidation in biology, selec...

Thermo-responsive micelles were prepared from brush-like block copolymers of proline-derived norbornene and macromonomers bearing oligo(lactide) groups. The brush-like polymers with moderate molecular weights were synthesized by the ring-opening metathesis block copolymerization of a proline-fun...

Leucine-derived norbornene monomer (1), oligo(lactic acid)-derived norborne macromonomer (2) and indomethacin-conjugated norbornene (3) were synthesized and polymerized using the Grubbs ruthenium complex as a catalyst. Macromonomer 2 was synthesized by the ring-opening polymerization of lactide ...

In an attempt to improve the thermo-oxidative stability of aerospace polyimides, we have explored the preparation of 7-fluorinated nadic endcaps. The latter are 5-norbonenyl acid esters in a 2-endo,3-endo configuration, which is required for imidization. The most obvious precursor is the corresp...

Amino acid-derived novel norbornene diester derivatives, 5-norbornene-endo,endo-2,3-dicarboxylic acid bis((S)-2-N-(tert-butoxycarbonyl)aminopropyl) ester (1a), 5-norbornene-exo,exo-2,3-dicarboxylic acid bis((S)-2-N-(tert-butoxycarbonyl)aminopropyl) ester (1b), bis(N-α-(tert-butoxycarbonyl)-l-al...

Specific retention volumes, activity coefficients at infinite dilution, partial molar excess free energies, partial molar excess enthalpies and entropies, partial molar enthalpies and entropies of solution for m-, p-, o-xylenes and m-, p-, o-ethyltoluenes in 3,4′-dimethyl-4-[(4-chlorobenzyl)oxy...

Herein we report, a series of new benzimidazolium chlorides as N-heterocyclic carbene (NHC) ligand and their corresponding palladium(II)-NHC complexes with the general formula [PdCl2(NHC)2] were synthesized. All new compounds were characterized by 1H NMR, 13C NMR, IR spectroscopy and elemental a...

The adsorption and corrosion inhibition behavior of three selected thiosemicarbazone derivatives, namely 3-pyridinecarboxaldehyde thiosemicarbazone (META), isonicotinaldehyde thiosemicarbazone (PARA) and 2-pyridinecarboxaldehyde thiosemicarbazone (ORTHO) at the nickel surface were studied electr...

DEAE-dextran hydrochloride is a positively charged biocompatible polyelectrolyte. Its behaviour in aqueous solutions – the changes in its colloidal characteristics and resulting conformation changes – were investigated using a combination of light scattering, densitometry and ultrasound spectr...

Nitroterephthalic acid (H2ntp), 2,5-dibromoterephthalic acid (H2bdc) and N,N′-donor ligands have been employed to synthesize three uranyl compounds: (H2-tmp)[(UO2)(ntp)2]·H2O (1), (2,2′-Hbpy)[(UO2)2(ntp)2.5]·H2O (2) and [(UO2)(bdc)(4,4′-bpy)0.5] (3) [where 2,2′-bpy = 2,2′-dipyridyl, 4,4′...

In this work, we present a highly sensitive and selective capacitive humidity sensor. Trianglamine hydrochloride is used as the sensing material, which is synthesized by a [3+3] cyclocondensation reaction between terpthaldehyde and 1R,2R-cyclohexanediamine followed by addition of hydrochloric ac...

Two novel sorbents based on polydopamine (PDA)-coated magnetic graphite oxide-metal organic frameworks nanoparticles [Cu(L-mal)(bpy)]·H2O (MGO-CuLBH) and [Cu(D-mal)(bpy)]·H2O (MGO-CuDBH) possessing of both magnetic property and excellent enantioselective ability were prepared and characterized...

Phenazopyridine hydrochloride (PHP), an azo dye, has been used in pharmaceutical chemistry. This study delineated the synthetic pathway of enzymatically oligomerized based on PHP. The molecular characterization of OPHP was determined via UV–vis, infrared, 1H NMR and 13C NMR techniques. Solvent ...

The electrochemical reduction of 1-methyl-4-methoxycarbonylpyridinium iodide (A) and 1-methyl-4-carboxypyridinium iodide (B) has been examined in an aqueous medium between H0 = −3 and − 4.5 and pH 9 and 14, respectively. As in the case of isonicotinic acid and its methyl ester, up to pH 7, a glo...