Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A series of tetradentate Schiff base ligands N,N′-bis[5-(4-n-alkoxy)phenylazosalicylidene]alkyldiamine(n-alkoxy = butyloxy, octyloxy) homologues based on 1,2 diaminoethane and 1,3 diaminopropane have been synthesized and characterized by IR, NMR and mass spectroscopy. For all the ligands the nickel(II), copper(II) and…
Although an adhesive joint can distribute the load over a larger area than a mechanical joint, requires no holes, adds very little weight to the structure and has superior fatigue resistance, but it not only requires a careful surface preparation of the adherends but also is affected by service environments. In this p…
Reactions of mononuclear oxohalomolybdates(V) with squaric acid (3,4-dihydroxycyclobut-3-ene-1,2-dione) afforded two types of {Mo2O4}2+ containing species with the squarato ligand engaged in a μ2-1,2-bis(monodentate) binding mode. In the presence of pyridine (Py) or 3,5-lutidine (3,5-Lut) neutral, dinuclear complexes…
This textbook for undergraduates and graduates begins with the basic topic of energy band theory and moves on to cover more advanced concepts and devices.Often introducing ideas with everyday comparisons, concepts are explained in full and described mathematically.The text includes problems, many of which make use of…
High Brunauer-Emmett-Teller method (BET) surface area and mesoporous activated carbons (ACs) were prepared by carbonization followed by activation of vinylidene chloride copolymer containing yttrium acetylacetonate Their performance as electrodes for electric double-layer capacitors (EDLCs) in nonaqueous electrolyte s…
The systematic investigation of steric and electronic effects on the formation of lanthanide complexes with the tridentate N,N,N′,N′-tetraalkylpyridine-2,6-dicarboxamide ONO ligands (alkyl = ethyl: L5, isopropyl: L6 and benzyl: L7) shows a reduced affinity with increasing steric demand in the order L5 < L6 < L7. [Ln(L…
A new type of mesoporous silica foam having extremely low bulk density (<0.01 g cm−3), high mesopore volume (>2 cm3 g−1) and specific surface area (>1000 m2 g−1) was prepared by the spraying of aqueous siliceous solutions containing alkyltrimethylammonium surfactants under high pH conditions. These remarkable properti…
Abstract An amphiphilic biodegradable polymer, poly(aspartic acid‐ co ‐lactic acid) (PAL), was synthesized by simply heating a mixture of aspartic acid (Asp) and L ‐lactide without additional catalysts or solvents. The unique branched architecture comprising succinimide units and lactic acid units was confirmed by IR…
Optical and structural properties of rare earth complexes with 2-pyridine carboxylic acid (‘Hpic’) are evaluated by luminescence spectroscopy, decay measurements, X-ray crystal structure determination, FTIR, DTA and metal content analysis. Corresponding Tb3+and Eu3+ complexes of this ligand are extraordinarily efficie…
New high-molecular-weight hydrophobic/hydrophilic segmented copolymers of poly(ester ether carbonate) structure, containing poly(epsilon-caprolactone) (PCL) and poly(ethylene glycol) (PEG) segments in their main chain, were synthesized and characterized. These copolymers were obtained by a two-step chain-extension rea…
The neutral dinuclear dihelicate [Cu2(L)2] x 2CH3CN (1) forms a unique 3D network in the solid state due to pi-stacking interactions, which are responsible for intermolecular antiferromagnetic coupling between Cu(II) ions.
The different variables of the aluminium anodisation process, anodisation time, current density, electrolyte nature, its temperature and concentration, and the effect of agitation, and their effects on the final alumina textural properties have been studied. Characterisation of the alumina generated by anodisation has…
The microstructure and electrochemical properties of coated titanium anodes have been studied using scanning electron microscopy, energy dispersive X-ray analysis, and electrochemical impedance spectroscopy (EIS) polarization and accelerated life test. The morphologies of anodes consist of dried mud-cracks surrounded…
The self-assembly of diprotonated phenyl and 4-sulfonatophenyl meso-tetrasubstituted porphyrins gives a spontaneous chiral symmetry breaking, but only for H2TPPS3−, which forms helicoidal colloidal particles; the selection of the resulting chirality sign by the hydrodynamic forces of a stirring vortex can be demonstra…
Description Twenty-one peer reviewed papers give you the latest research and technical developments in the medical uses of stainless steels. It covers a wide range of topics, including corrosion, wear, biological response, radiopacity, and the high cost of medical products. New alloys are discussed as solutions to som…
The syntheses and the crystal structures of (NH4)11[LnIII(PMo11O39)2]·16H2O (LnIII = Ce (1), Sm (2), Dy (3) or Lu (4)) are reported in which an LnIII cation is sandwiched between two ‘lacunary’ [PMo11O39]7− anions to give a complex with eight oxygen atoms coordinated to the lanthanide centre in a twisted square antipr…
Microporous and mesoporous siliceous phases (MFI, FAU, MCM-48, MCM-41, and SBA-15) were modified with zinc via aqueous and organometallic routes and characterized with techniques that reflect the structure of the matrix, the distribution of zinc over the matrix, and the structure of the zinc oxide species (XRD, nitrog…
Joule heating of the oxide-covered aluminum electrode is the major heat source during anodizing, and the extent of heat removal is dependent on the electrolyte flow i.e. , convection. For various galvanostatic and potentiostatic anodizing conditions, at different bulk electrolyte temperatures it was found that when th…
Abstract The polymerization of thiophene (TP), in bulk and in solution in CHCl 3 by FeCl 3 resulted in the formation of a polymer which was characterized by FTIR as polythiophene (PTP). High yield was realized in the latter case. The polymerization of TP with FeCl 3 and nanodimensional Al 2 O 3 resulted in the formati…
The preparation and magnetic investigation of five mononuclear copper(II) complexes of formula [Cu(pyim)(C2O4)(H2O)]·2H2O (1), [Cu(pyim)(C4O4)(H2O)2]·2H2O (2), Cu(pyim)(C5O5)·2.5H2O (3), [Cu(H2bim)(C2O4)(H2O)]·H2O (4) and [Cu(bpz)(C5O5)(H2O)] (5) [pyim = 2-(2-pyridyl)imidazole, H2bim = 2,2′-biimidazole, bpz = 2,2′-bip…