Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTTransition Metal-Catalyzed Silanone GenerationRoman Goikhman, Michael Aizenberg, Linda J. W. Shimon, and David MilsteinView Author Information Departments of Organic Chemistry and Chemical Services The Weizmann Institute of Science Rehovot 76100, IsraelCite this: J. Am…
Halide recognition by a porphyrin aggregate at the air-water interface has been studied. π-A Isotherms and UV reflection spectra of mixed monolayers of 5,10,15,20-tetraphenyl-2-aza-21-carbaporphyrin, trivial name ‘N-confused tetraphenylporphyrin’(NC-TPP), with methyl octadecanoate were measured in 1 mmol dm–3 NaX aque…
This book reviews the current state of the theory of pattern formation by a liquid-solid interface during crystal growth. It gives a pedagogical introduction to the subject, including experimental results, mathematical modeling and linear stability analysis. After highlighting the success of the theory in resolving th…
Reaction of Al(OH) 3 and MgO or Mg(OH) 2 with triethanolamine [TEA, N(CH 2 CH 2 OH) 3 ] in ethylene glycol (EG) provides, in one step, access to a polymer-like precursor to spinel. On the basis of high-resolution mass spectroscopy, chemical analysis and 27 Al solution NMR, the precursor appears to be a trimetallic dou…
The self-assembly of nanometre-sized Au and CdS particles to well defined multilayer structures on dithiol derivatised gold surfaces is quantitatively studied by quartz crystal microgravimetry.
Reverse micelles formed using the cationic surfactant, hexadecyltrimethylammoniumbromide (CTAB) were applied as a reaction medium for esterification and transesterification (alcoholysis) reactions catalysed by a recombinant lipolytic enzyme, cutinase. Reactions were initially studied with either the alcohol substrate…
Thermoreversible gelation of poly(γ-benzyl-α- l -glutamate) in toluene has been studied by differential scanning calorimetry and by static and dynamic light scattering. For high molecular weights, this system tends to form clear gels when rapidly cooled to low temperatures and more cloudy gels for quenches to temperat…
An aqueous solution of K3Fe(CN)6 reacts with an acetonitrile solution of Ph3SnCl to form the red layered polymeric compound (Ph3Sn)3Fe(CN)6·H2O·2CH3CN. The structure of the compound contains one semilinear chain and one zigzag chain. The zigzag sheets formed by those two chains are connected by hydrogen bonds. Channel…
In-situ Zn K-edge extended X-ray absorption fine structure (EXAFS) analysis of colloidal ZnS nanocrystallites (ZnS−DMF, mean diameter 3 nm, hexagonal) prepared by reacting zinc perchlorate (ZnS−DMF−ClO 4 ), zinc sulfate (ZnS−DMF−SO 4 ), or zinc acetate (ZnS−DMF−Ac), with H 2 S in N,N -dimethylformamide (DMF) was perfo…
Neutron reflection is used to examine the concentration profile of bimodal tethered layers in a good solvent. The tethered layers are Langmuir monolayers of highly asymmetric poly(dimethylsiloxane)−polystyrene (PDMS−PS) diblock copolymers at the air surface of ethyl benzoate. The PS blocks dangle into the good solvent…
Molecular mechanics minimizations were performed on alkyl-substituted biphenyls to explore the effect of the position and length of side chains on the planarity of the phenyl rings. This approach was extended to poly( p -2,5-di- n -alkylphenylene)s. The structural behavior was investigated by systematically modifying…
It is known that adhesion molecules play a crucial role in the development of glomerulonephritis. Therefore, we investigated the effects of acteoside on the expression of intercellular adhesion molecule-1 (ICAM-1) in nephritic glomeruli, in vivo, and human umbilical vein endothelial cells (HUVECs) and rat mesangial ce…
The adsorption behavior of 4-cyanobenzoic acid (4CBA) on a silver film has been investigated by infrared and Raman spectroscopies. The Langmuir adsorption model was applicable not only to the self-assembling but also to the spin-coating processes. By taking the infrared reflection-absorption and surface-enhanced Raman…
The hexahomotrioxacalix[3]arene macrocycles 1 are observed to bind trivalent metals (Sc 3+, Lu 3+,Y 3+, La 3+ ) more strongly than alkali metal ions (Li +, Na +, K + ). Complexes of macrocycle 1a with Lu(III) ( 3 ), Y(III) ( 4 ), and La(III) ( 5 ) have been structurally characterized to be μ-aryloxo-bridged dimers wit…
Stable crystals of (NiOETPP(BTD)2+)(Ag+)(ClO4)2·2CH2Cl2 were obtained from the oxidation of NiOETPP with AgClO4 in CH2Cl2 followed by addition of BTD. (OETPP = 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin; BTD = 2,1,3-benzothiadiazole). An X-ray structure reveals that the complex is a bimetallic polym…
A compilation of the chemical data and brief review of the mineral zirconolite, essentially CaZrTi207, is presented. A total of 321 chemical analyses, 169 previously unpublished, from 39 of the 46 known terrestrial localities, and covering IO rock types are tabulated. A brief description of the minerals associated wit…
The water vapor diffusion resistance of the hydrophilic component of Gore-Tex™ II is measured at temperatures down to -24°C. The experiment is designed to simulate diffusion of water vapor through a clothing shell from a coating of ice on its inner surface. The permeability of the samples decreases exponentially with…
Article Effect of Various Deacidification Solutions on the Stability of Cellulose Pulps was published on January 1, 1996 in the journal Restaurator. International Journal for the Preservation of Library and Archival Material (volume 17, issue 1).
A tetraazamacrocyclic ligand-containing four carboxamide coordinating arms has been prepared, which incorporates a 7-amino-4-methyl-2(1H)-quinolinone group (carbostyril 124). The europium and terbium complexes of this ligand have been isolated and sensitisation of the characteristic metal luminescence, following excit…
Can metal complexes of biliverdin analogues containing more or less than four pyrrole moieties be generated? The answer seems to be “yes” as demonstrated by the synthesis of the unprecedented Cu(II) tripyrrane complex reported in this communication.