Materials Literature
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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 A total of 321 chemical analyses, 169 previously unpublished, from 39 of the 46 known terrestrial localities, and covering IO rock types are tabulated.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.
The salts (Ph(4)E)[M(SOCPh)(3)] (M = Zn, Cd, or Hg; E = P or As) are produced by the reaction of Zn(NO(3))(2).6 H(2)O, Cd(NO(3))(2).4H(2)O or HgCl(2) with Et(3)NH(+)PhCOS(-) and (Ph(4)E)X (E = P, X = Br; E = As, X = Cl) in aqueous MeOH in the ratios M(II):PhCOS(-):Ph(4)E(+) = 1:>/=3:>/=1. The crystal structures of (Ph…
The complex strain-optical ratio, O *(ω), and the complex Young's modulus, E *(ω), of four vinyl polymers, atactic polypropylene, 1,2-polybutadiene, poly(ethylethylene), and poly(4-vinylbiphenyl), were measured from the rubbery plateau to the glassy zone to investigate the origin of the birefringence and the chain ori…
Linear viscoelastic and dielectric relaxation behavior was examined for blends of styrene−isoprene (SI) diblock copolymers in a nonentangling homopolyisoprene (hI) matrix. The copolymers formed spherical micelles with S cores and I corona. The I blocks had type-A dipoles, and their global motion induced dielectric rel…
We have prepared colloidal suspensions of 600 Å diameter latex polyballs in a lyotropic liquid crystal. The phase diagrams of the mixtures have been determined for a few values of the surfactant to water ratio. In the nematic phase, the particles remain suspended at high temperatures but undergo a gas−liquid transitio…
Binuclear copper(II) complexes of composition [Cu 2 (OH/OMe)(O 2 CPh) 2 (tmen) 2 ](PF 6 ) ( 1 ) are prepared by reacting copper(II) benzoate with N, N, N ‘, N ‘-tetramethylethane-1,2-diamine (tmen) in methanol followed by an addition of NH 4 PF 6 . The crystalline product 1 is a 1:1 mixture of two complexes viz . [Cu…
An advanced theoretical model for the structure of the interface between two immiscible homopolymers is presented. The theory is based on a combination of the Flory−Huggins model and the square-gradient approach. We first analyze the effect of molecular weights of the components on the interfacial tension in the limit…
The open cluster complex [Pt6(μ-CO)6(μ-dppp)2(dppp)2], 1, dppp = Ph2P(CH2)3PPh2, can encapsulate mercury(0) or thallium(I) with loss of dppp to give the cryptate cluster [Pt6(μ6-M)(μ-CO)6(μ-dppp)3]n+, 2 (M = Hg, n = 0) or 3 (M = Tl, n = 1), respectively.
The alloys Mg–6Si and Mg–4Si–4Zn (wt-%) were extruded at 573 K and the mechanical properties investigated by tensile testing at strain rates from 2 × 10−5 to 2 × 10−2s−1 and at temperatures in the range 673–773 K. The Mg–Si alloy behaved as M type at any given strain rate. The Mg–Si–Zn alloy behaved as A type at strai…
A novel framework comprised of [Ge4S10]4– adamantine clusters linked by Ag+ is synthesized hydrothermally and its structure determined utilizing data collected on a 36 pl (36 × 10–12 l) single crystal using an X-ray synchrotron/imaging plate combination.
Dielectric measurements of a polymerizing amine/epoxy system were carried out in the frequency interval ${10}^{3}$--${10}^{10}$ Hz. The vitrification of the system due to the increase of connectivity was analyzed by measuring the change of the shape parameters of the main relaxation, m and n, during the reaction; the…
The lattice cluster theory (LCT) is used to study the influence of structural and energetic asymmetries on the miscibilities of binary polyolefin blends. The theory describes monomer molecular structures by using a united atom model for the polyolefins, where each CH n united atom group occupies a single lattice site…
Polymethylhydrosiloxanes (PMHSs) crosslinked with hexa-l,5-diene or hexane-l,6-diol have been considered as potential precursors for Si–C–O systems. Their pyrolysis under an argon flow has been investigated mainly by 29Si MAS NMR spectroscopy. The two systems, with similar C/Si but different O/Si ratios, show differen…
Some new synthetized pyrazole organic-type compounds have been tested as inhibitors for the corrosion of iron in 1M HCl by weight-loss and electrochemical polarization methods. Both techniques gave the same order of inhibition. The compound l,3-bis(3' chloromethyl-5'-methyl-1'-pyrazolyl)propane (Inh.9) was the better…
A new synthetic route to metallo-1,2-enedithiolates is presented. The addition of 1 equiv of the α-bromo ketones Ar-C(O)CHXR (X = Br) {Ar = 2-quinoxaline, 2-, 3-, or 4-pyridine, Ph, Cl−Ph, and pyrene (R = H); Ar = 2-quinoxaline (R = Me); and Ar = R = Ph} to Cp 2 Mo(SH) 2 followed by the addition of base results in the…