The pore formation in the system resol resin – ethylene glycol – p-toluenesulfonyl chloride based on polymerization induced phase separation (PIPS), post-curing and pyrolysis techniques are studied by thermal analysis methods, pyrolysis gas chromatography mass spectrometry and electron microsc...

Ethnopharmacological relevanceDryopteris fragrans (L.) Schott (D. fragrans), a deciduous perennial herb, has been traditionally used for treatment of various skin diseases in Heilongjiang province of China for many years. Phloroglucinol derivatives extracted from D. fragrans were the most effect...

The synthesis and characterization of four new β-ketiminate hafnium(IV) chloride complexes dichloro-bis[4-(phenylamido)pent-3-en-2-one]-hafnium (4a), dichloro-bis[4-(4-methylphenylamido)pent-3-en-2-one]-hafnium (4b), dichloro-bis[4-(4-methoxyphenylamido)pent-3-en-2-one]-hafnium (4c), and dichlo...

We report on the preparation, structure and scintillation properties of single crystal cesium hafnium chloride bromide (Cs2HfCl4Br2 or CHCB). The crystals were grown using a vertical Bridgman technique process. Single crystal X-ray diffraction showed that the as grown CHCB crystal structure was ...

A series of new bisphosphoramidate and (thio)phosphoramidate derivatives with the general formula R1R2P(X)–Y–P(X)R1R2 have been synthesized and characterized by IR and NMR spectroscopies (L1–L12). The crystal structure of compound 1,4-[(C2H5O)2P(S)(CH2)3NH]2C4H8N2 (L4) is also investigated by...

New 5,6-dihydro-1,10-phenanthroline derivatives were prepared in high yield via ytterbium(III) triflate-catalyzed alcoholysis of the corresponding epoxide. Enzymatic transesterifications of racemic alkoxy alcohols afforded enantioselective separations with up to 99% ee. The lipase derived from B...

The reaction of the Pr3+ ion with water has been studied at 60°C in 3 m (molal) (Li)ClO4 ionic medium by measurements of the hydrogen ion concentration with a glass electrode. The metal concentration ranged from 0.03 to 1 m, while the acidity was varied from high values, where hydrolysis is neg...

Absorption spectroscopic studies on the mixed-ligand complexes of Pr (III) and Nd (III) with 2,2′-bipyridyl and thiocyanate in pyridine, DMSO, DMF and methanol are presented. The oscillator strengths for the hypersensitive and non-hypersensitive transitions have been calculated and variation in...

The X-ray structure of a new PrCl3(BrCH3OC7H7NO)3 compound has been determined and described in monoclinic space group P21/n with four molecules per unit cell of dimensions: a=8.232, b=23.733, c=16.763 Å and β=90.75°. The Pr3+ ion is six-coordinated with three Cl ions and three oxygen ions of ...

New praseodymium complexes of 2,6-lutidine, 4-methoxy-2,6-lutidine and 3-halo-2,6-lutidine N-oxides (LuO) have been synthesised and chemically characterised. The Fourier transform IR and Raman spectra have been measured in the range 50–4000 and 80–4000 cm−1, respectively, and discussed in term...

Although ammonium perchlorate, widely used as a rocket propellant, has been extensively investigated for many years, the mechanism of its thermal decomposition at low temperatures remains controversial. Examination of the thermal behaviour of large crystals of partly and completely deuterated am...

Catalysts are often added to solid propellant formulations to tailor burning rates. Nanocatalysts can increase propellant burning rates over standard catalyst sizes due to the increase in surface area per unit weight. However, the increased surface area that the binder must wet can be prohibitiv...

Nanoparticles of neodymium orthophosphate (NdPO4) were prepared through a facile wet co-precipitation technique. The X-ray diffraction (XRD) studies revealed the material belonging to monoclinic monazite phase with crystallite size of 30.8 nm. Scanning electron microscopic studies showed that th...

The electronic absorption, emission spectra and fluorescence lifetimes of anhydrous and diluted (0.01–0.13 M) solutions of Nd(ClO4)3 and Nd(NO3)3 in CH3CN, (CH3)2CO, DMSO, and DMF are used to investigate the solvation of the Nd(III) ion. Both the oscillator strengths and the lifetimes depend st...

Carbon Nanotube–Neodymium Oxide (CNT–Nd2O3) composite was prepared by using acid treated carbon nanotubes (CNTs) and neodymium nitrate in the presence of sodium dodecyl sulfate and ammonia liquid. Techniques of transmission electron microscopy (TEM), high resolution transmission electron micro...

This manuscript presents the non-linear optical parameters obtained specifically at 532 nm using the new bis-{1(4),8(11),15(18),22(25)-(tetrapyridin-3-yloxy) phthalocyaninato} neodymium(III) complex in green (2a) and blue (2b) forms as well thin films prepared from the green form in the presence...

Catalyzed thermal decomposition process of ammonium perchlorate (AP) over neodymium oxide (Nd2O3) was investigated. Catalytic performances of nanometer-sized Nd2O3 and micrometer-sized Nd2O3 were evaluated by differential scanning calorimetry (DSC). In contrast to universal concepts, catalysts i...

Distribution ratios of trivalent lanthanide ions in extraction reactions may be affected by the denticity of a solvent extraction ligand for entropic reasons. This hypothesis was tested by studying the reactions of extraction of the lanthanides(III) (La, Nd, Eu, Dy, Er and Yb) from perchlorate m...

In this investigation, a facile sonochemical route has been developed for the preparation of silver vanadium oxide (SVO) micro/nanorods by using silver salicylate and ammonium metavanadate as silver and vanadate precursor, respectively. Here, silver salicylate, [Ag(HSal)], is introduced as a new...

The effect of silver metavanadate doping on physicochemical properties and thermal behaviour of the activated carbons obtained from waste materials was investigated. The carbonaceous supports were subjected to carbonisation at 400 or 600 °C. The samples carbonised at 600 °C have much more deve...