Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the microphase separation transition in low-molecular-weight diblock copolymersJohn N. Owens, Irena S. Gancarz, Jeffrey T. Koberstein, and Thomas P. RussellCite this: Macromolecules 1989, 22, 8, 3380–3387Publication Date (Print):August 1, 1989Publication His…
Procedures of X-ray diffraction line profile analysis for the evaluation of the dislocation content in plastically deformed hexagonal materials were tested by means of conventional powder diffractometry on polycrystalline zirconium deformed under tension at 77 K. In order to obtain a representative picture of the disl…
The microstructure of nanocrystalline Pd was investigated by small-angle neutron scattering. The strong scattering signal is interpreted as originating from crystallites embedded in a matrix formed by incoherent interfaces. From the scattering curves size distributions were determined, which yield an average radius of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of molecular weight on the thermotropic mesophases of poly[6-[4-(4-methoxy-.beta.-methylstyryl)phenoxy]hexyl methacrylate]Virgil Percec, Dimitris Tomazos, and Coleen PughCite this: Macromolecules 1989, 22, 8, 3259–3267Publication Date (Print):August 1, 1989Publicat…
A quantitative description of the degree of sensitization in austenitic stainless steels has been developed based on percolation theory. This is used to predict the likelihood of failure of sensitized stainless steel by intergranular stress corrosion cracking (IGSCC). The underlying premise is that, for a component to…
Charge coupling of the catalyzed reduction of O 2 on platinized poly(3‐methylthiophene) [P(3‐MT)] films to the anodic dissolution of Ti is reported. Specifically, the redox polymer with Pt catalyst is used in these studies to mediate electrons generated by Ti dissolution and consumed by O 2 reduction. Due to the large…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDehydrogenative coupling of diarylsilanesLihsueh S. Chang and Joyce Y. CoreyCite this: Organometallics 1989, 8, 8, 1885–1893Publication Date (Print):August 1, 1989Publication History Published online1 May 2002Published inissue 1 August 1989https://pubs.acs.org/doi/10.1021/om…
▪ Abstract The phase-field method has recently emerged as a powerful computational approach to modeling and predicting mesoscale morphological and microstructure evolution in materials. It describes a microstructure using a set of conserved and ...Read More
A novel type of mesogenic molecule and a new way of introducing chirality into liquid-crystalline compounds are both realized in roof shaped 1, obtained as a mixture of three diastereoisomers. Compound 1 forms an S mesophase between 102 and 119°C, and its electro-optic switching behavior in an electric field fits the…
Angular distributions of the $^{54}\mathrm{Fe}$(p,n${)}^{54}$Co and $^{54}\mathrm{Fe}$(n,p${)}^{54}$Mn cross sections have been measured to test the Gamow-Teller sum rule [${S}_{\mathrm{\ensuremath{-}}}$-${S}_{+}$=3(N-Z)] in a case where the Gamow-Teller strength is large for both channels. The results for ${S}_{\math…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyhedral aluminosilsesquioxanes: soluble organic analogs of aluminosilicatesFrank J. Feher, Theodore A. Budzichowski, and Keith J. WellerCite this: J. Am. Chem. Soc. 1989, 111, 18, 7288–7289Publication Date (Print):August 1, 1989Publication History Published online1 May 20…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntermediates in the epoxidation of alkenes by cytochrome P-450 models. 5. Epoxidation of alkenes catalyzed by a sterically hindered (meso-tetrakis(2,6-dibromophenyl)porphinato)iron(III) chlorideDrazen Ostovic and Thomas C. BruiceCite this: J. Am. Chem. Soc. 1989, 111, 17, 6…
We report the structure of two chain compounds formed by manganese(I1) hexafluoroacetylacetonate and nitronyl nitroxide radicals 2-R-4,4,5,5-tetramethyl-4,5-dihydro-lH-imidazolyl-l3--ooxxiyd e, Mn(hfac),NITR, with R ethyl, Et (I), and n-propyl, n-Pr (11), which crystallize in the monoclinic P21/n space group with a =…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarboxylate-histidine-zinc interactions in protein structure and functionDavid W. Christianson and Richard S. AlexanderCite this: J. Am. Chem. Soc. 1989, 111, 16, 6412–6419Publication Date (Print):August 1, 1989Publication History Published online1 May 2002Published inissue…
Low-temperature (12 K) resonance Raman spectra are reported for tetragonal and triclinic crystallites of nickel octaethylporphyrin and its meso-d<sub>4</sub>, <sup>15</sup>N<sub>4</sub>, and methylene-d<sub>16</sub>isotopomers. Spectral contributions of the A and B forms in mixed triclinic crystals have been isolated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResponse to criticism of nucleation theory as applied to crystallization of lamellar polymersJohn D. Hoffman and Robert L. MillerCite this: Macromolecules 1989, 22, 8, 3502–3505Publication Date (Print):August 1, 1989Publication History Published online1 May 2002Published ini…
Abstract Solid-state nuclear magnetic resonance (NMR) spectroscopy, thermal analysis, and X-ray powder diffraction data on the tubular, hydrous aluminosilicate imogolite were found to be fully consistent with a previously proposed crystal structure consisting of a rolled-up, 6-coordinate Al-O(OH) sheet, bonded to isol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHomogeneous sonochemistry in radical-chain reactions. Sonochemical hydrostannation and tin hydride reductionEiichi Nakamura, Daisuke Machii, and Tsuyoshi InubushiCite this: J. Am. Chem. Soc. 1989, 111, 17, 6849–6850Publication Date (Print):August 1, 1989Publication History P…
The reaction sodalite = β-nepheline + NaCl ( s ) was reversed in solid-medium apparatus (923 K, 7.6–8.0 kbar; 973 K, 7.4–7.6 kbar; 1073 K, 7.8–8.0 kbar; 1173 K, 8.4–8.6 kbar) and the reaction sodalite = carnegieite + NaCl ( l ) was reversed at 1 bar (1649–1652 K). The calculated slope for the first reaction is −11 bar…
Methods which determine the number and disorder of lattice planes in a crystal from the Fourier cosine coefficients of the intensity profile of an X-ray reflection use only the low harmonics and require that the coefficients be normalized so that the zero harmonic is unity. Experimentally, the profiles can only be rec…