2-Styrylfuran (STF) resembles stilbene and certain other 1,2-substituted ethylenes, e.g. 2-styrylthiophene, in being very effective in capturing benzoyloxy radicals. When STF is used as an additive during polymerization of a monomer such as methyl methacrylate with benzoyl peroxide as initiator,...

Complex formation between Ni(II), Co(II) and Mn(II) and 3-(2-furyl)-2-mercaptopropenoic and 3-(2-furyl)-2-mercaptopropanoic acids has been studied using glass electrode potentiometry. Ligand-metal ion mixtures in 10% (v/v) ethanol-water containing 0.1 mol dm–3KNO3 were titrated with potassium h...

8-Hydroxyquinoline (8HQ) compounds have been reported to possess diverse bioactivities. In recent years, drug repositioning has gained considerable attention in drug discovery and development. Herein, 8HQ (1) and its derivatives (2–9) bearing various substituents (amino, nitro, cyano and haloge...

Two 2-substituted 8-hydroxyquinoline ligands (HL1 and HL2) containing a cyano group were synthesized and characterized by ESI-MS, NMR spectroscopy and elemental analysis (EA). Solvothermal reactions of the two ligands with ZnX2 and CdX2 (X−: NO3− and OAc−) salts afforded three luminescent comple...

The critical micelle concentrations (CMC) of three double long-chain salts, octyltrimethylammonium ortyl sulfate (C8–C8), decyl sulfate (C8–C10) and dodecyl sulfate (C8–C12), were determined at 298.15 K as a function of the pressure up to 200 MPa. With respect to C8–C8, the CMCs at 293.15 an...

Static and dynamic light scattering, pulsed-gradient FT-NMR, viscosity, and surface tension are measured for the sodium dodecyl sulfate (SDS)/octyltrimethylammonium bromide (OTAB)/water system (below a total surfactant concentration of 1% by weight). Results in the single-phase micellar region (...

Molecular weights of micelles of octyltrimethylammonium octanesulfonate in water and octyltrimethylammonium decanesulfonate in water and in aqueous KCl solutions were determined by light scattering. Evidence is presented to show that the aggregates are not spherical.

Association processes in aqueous solutions of octyltrimethylammonium bromide, C8TAB, have been studied in aqueous NaBr solutions at temperatures from 20 to 55°C. The values of the critical micelle concentration, CMC, were determined from the intersections of two straight line portions of the pl...

Zn2+ electroreduction in the presence of octyltrimethylammonium bromide at a mercury electrode has been studied by voltammetric and impedance measurements in the range of 288–308 K. Kinetic data showed a two-step character of the electrode process and an inhibiting influence of octyltrimethylam...

The kinetics of the ligand exchange reaction between tetrakis(acetylacetonato)hafnium(IV), Hf(acac)4, and free acetylacetone (Hacac) in C6D6 have been studied by the 1H NMR line-broadening method. The observed first- order rate constant kobs is expressed as a function of [Hacac]enol: kobs = (k2 ...

Low or negative thermal expansion (NTE) has been previously observed in members of the ZrP2O7 family at temperatures higher than their order-disorder phase transitions. The thermoelastic properties and phase behavior of the low temperature superstructure and high temperature negative thermal exp...

The thermogravimetric behavior of HfCl4 powders with different hydration states has been compared. Strongly hydrated powders consist of HfOCl2·nH2O with n>4. Partially hydrated powders consist of particles with a HfCl4 core and a hydrated outerlayer of HfOCl2·nH2O with n in the range of 0–8. ...

A novel process for the separation of hafnium from thiocyanic acid medium using the mixture of diisobutyl ketone (DIBK) and tributyl phosphate (TBP) as the extractant was developed. This extraction process was investigated experimentally as a function of the amount of TBP added, acidity, zirconi...

Three new compounds, N-(3,4-dichlorophenyl)-N′-(2-methylbenzoyl)thiourea (2a), N-(3,4-dichlorophenyl)-N′-(3-methylbenzoyl)thiourea (2b) and N-(3,4-dichlorophenyl)-N′-(4-methylbenzoyl)thiourea (2c) are isomers which have been successfully synthesised and characterised by typical spectroscopic ...

A thermosensitive polymeric gel: N-isopropylacrylamide (NIPAM) copolymerized with 2-(methacryloyloxy)ethyl phosphate (MR) and crosslinked with ethylene glycol dimethacrylate (EGDMA) was used in preliminary experiments aimed at determination of thermodynamic functions associated with the exchange...

Titanium and Niobium oxide are metallic surfaces used as biomaterials due to their biocompatibility. Their improvement is very important in order to create smart surfaces in terms of responsiveness, with polymer brushes that have a switchable behavior in external stimulus of pH, temperature and ...

Poly(2(methacryloyloxy) ethyl phosphorylcholine) (PMPC) a zwitterionic biopolymer has been used to prepare hybrid inorganic/organic/inorganic tri-layered magnetic composite particles. Mesoporous SiO2 particles of average diameter 284.8 nm are first prepared by sol-gel technique in presence of ce...

Copolymer nanocomposites were prepared by suspension copolymerization of bis[2-(methacryloyloxy)ethyl] phosphate and methyl methacrylate, together with bis(2-ethylhexyl) phosphate layered double hydroxide and a montmorillonite, Cloisite 93A. X-ray diffraction and transmission electron microscopy...

Hybrid sol–gel coatings were prepared from 3-(trimethoxysilyl) propyl methacrylate (MeSi) and bis [2-(methacryloyloxy) ethyl] phosphate (MePO) via sol–gel process with different molar ratios of precursors to investigate the influence of phosphate content on the structure and anticorrosion prop...

Steroid-selective polymers were prepared by the molecular imprinting technique, using 2-(methacryloyloxy)ethyl phosphate as functional monomer. The retentivity and selectivity of the obtained imprinted polymers were evaluated by liquid chromatography. The cholesterol-imprinted polymer showed hig...