Materials Literature
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A cyclic tetranuclear CuII2GdIII2 complex, in which CuII and GdIII ions are arrayed alternately, has an S = 8 spin ground state, due to the ferromagnetic spin coupling between SGd = 7/2 and SCu = 1/2.
Two heterometallic complexes [{CuII(HLOX)NiII(N3)}2] and [(tmtacn)CoIII(μ-OH)CuII(LOX)NiII(OH2)2][ClO4]2 (tmtacn = 1,4,7-trimethyl-1,4,7-triazacyclononane) containing the same [CuIINiII] core embedded in an unsymmetrical dicompartmental imine-oxime ligand H4LOX have been synthesized and characterized. Their crystal st…
Different characteristic surface structures such as spheres and hemispheres, honeycomb, regularly spaced droplets and fibers are formed by electrostatic polysaccharide interaction between chitosan and gellan gum via polyion complex (PIC) formation. Spherical droplet-like PIC capsules of varying diameter form in soluti…
Infrared reflection absorption spectroscopy and quartz crystal microbalance, integrated into a one‐surface analytical system, and complemented with tapping mode atomic force microscopy, has been used to explore the metal/atmosphere interfacial region under atmospheric pressure conditions. This unique combination of in…
Copper–aluminium mixed oxide catalysts (Cu–Al2O3) for selective reduction of NO with propene (C3H6-SCR) were characterised as a function of Cu content. The results from different techniques, Cu K-edge and Cu L3-edge XANES, diffuse reflectance UV–Vis, XPS, and XRD were combined to develop coherent description of the ph…
Platinum nanosheets with thickness 2–3 nm containing hexagonal holes were formed between graphite layers by hydrogen reduction of platinum chloride–graphite intercalation compounds.
Barium ferrite is widely used as a permanent magnet because of its large coercivity and low cost. The usual route to produce barium ferrites is the ceramic method. In order to overcome the detrimental milling effects in the magnetic properties, ferrite powders were obtained by coprecipitation. This method can produce…
The ligand H2L = 2,2′-bipyridine-6,6′-dicarboxylic acid reacts with Ln(NO3)3·xH2O (x = 6, Ln = Eu, Tb; x = 5, Ln = Gd) in MeOH/Et3N to give complexes with 1∶2 and 2∶3 metal∶ligand stoichiometry, (Et3NH)[LnL2] and [Ln2L3(H2O)3]·xH2O (x = 1, Ln = Eu, Tb; x = 0, Ln = Gd) which have been isolated and characterised. A size…
The individual effects of heterogeneity and roughness on contact angles have been repeatedly analysed in the literature, but the application of the accepted models to practical situations is often not correctly performed. In the present paper the combined effects of roughness and heterogeneity on the contact angles of…
Angle-resolved XPS and micro-XPS have been used for characterizing reaction products consisting of oxide and oxyhydroxide formed on the surface of high-purity iron exposed to air at room temperature for a long time. Angle-resolved measurements of O 1s XPS spectra have shown that an oxyhydroxide layer covers a native o…
Aminated phyllosilicates have been synthesized by a sol–gel process from reactions of nickel ions and three analogous trialkoxysilanes, 3-(trimethoxysilyl)propylamine, N′-[3-(trimethoxysilyl)propyl]ethylenediamine and N′-[3-(trimethoxysilyl)propyl]diethylenetriamine, in aqueous basic medium at 298 and 323 K. The inorg…
Photoluminescence studies on pure and compounds are presented. The pure compound displays a broad band in its emission spectrum when excited with 254 nm, which peaks at 467 nm and is due to the energy transfer between the molecular orbital of the ligand and charge transfer state of the . The excitation spectrum shows…
In the presence of Na+, a 1,3-alternate-calix[4]arene bearing four guanosine units forms a self-assembled nanotube.
Two new tridentate ligands of the type NH4C5NNC6H4N(H)C6H4(R) (R = H (HL1) or CH3 (HL2)) have been synthesized by the cobalt mediated direct phenyl ring amination of co-ordinated NH4C5NNC6H5. These bind to metal ions as monoanionic N,N,N-donors (L−), affording [MnIIL2] and [CoIIIL2]ClO4 complexes in very high yields.…
By chemical modification of natural rubber, it is possible to modify its basic properties (for instance, improvement of gas permeability, resistance to oils or fire resistance) or to prepare new polymeric materials for specific applications (for instance, photocrosslinkable rubbers and rubbers support of active molecu…
In connection with aim of maximizing the bio-availability of conventional drugs with minimum side-effects, new drug delivery systems (DDS) continue to attracted much attention. The controlled or sustained release of drugs represents one such approach, and in this regard report upon a study of DDS using biodegradable p…
A mathematical simulation carried out to study the physical mechanisms of moisture diffusion into hygroscopic fabrics during humidity transients is reported. On the basis of a mathematical model developed to describe the coupled heat and moisture transfer in wool fabric, the moisture-sorption mechanisms are investigat…
The effects of morphology and molecular composition on the electrical strength of blends of linear and branched polyethylenes were investigated. A range of blend systems were considered, in which both the molecular mass of the linear polymer and the comonomer in the branched component were varied. All the blends conta…
The photoluminescence behavior of phosphor was investigated by measuring emission and excitation spectra, and decay curves. The relative emission intensity and the decay time have been monitored as a function of concentration for both and transitions. The decay behavior of transition, for which well known cross‐relaxa…
Free base, zinc and magnesium mono-ethynyl phthalocyanines have been prepared as building blocks for constructing phthalocyanine-containing molecular devices. The phthalocyanine building blocks were prepared by the statistical reaction of 4,5-diheptylphthalonitrile and 4-(3-hydroxy-3-methylbut-1-ynyl)phthalonitrile, f…