Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal Structure Determination from Powder Diffraction Data by Monte Carlo MethodsKenneth D. M. Harris, Maryjane Tremayne, Philip Lightfoot, and Peter G. BruceCite this: J. Am. Chem. Soc. 1994, 116, 8, 3543–3547Publication Date (Print):April 1, 1994Publication History Publi…
Six series of a family of non-symmetric dimers, the α-(4-cyanobiphenyl-4′-yloxy)-ω-(4-n-alkylanilinebenzylidene-4′-oxy)alkanes, have been prepared. In three of the series, the number of methylene groups in the flexible alkyl spacer has been varied from 3 to 12 while the terminal alkyl chain is held constant at either…
The structure of beta-isotactipc olypropylene (beta-iPP) as been investigated taking into consideration X-ray and electron-diffraction data supplemented by packing energy calculations. The structure is \ncharacterized by extensive disorder, and two structural models can be envisaged both are based on domains of he…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChain Architecture and Asymmetry in Copolymer MicrophasesScott T. MilnerCite this: Macromolecules 1994, 27, 8, 2333–2335Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 April 1994https://pubs.acs.org/doi/10.1021/ma00086a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTXAFS Study of Ti-Silicalite: Structure of Framework Ti(IV) in the Presence and Absence of Reactive Molecules (H2O, NH3) and Comparison with Ultraviolet-Visible and IR ResultsS. Bordiga, S. Coluccia, C. Lamberti, L. Marchese, A. Zecchina, F. Boscherini, F. Buffa, F. Genoni, G…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTClay-Polymer Nanocomposites Formed from Acidic Derivatives of Montmorillonite and an Epoxy ResinMuh S. Wang and Thomas J. PinnavaiaCite this: Chem. Mater. 1994, 6, 4, 468–474Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue…
This paper describes the principle of the pulsed electroacoustic (PEA) method, which was developed a few years ago for profiling the space charge distribution in an acoustically homogeneous solid material. Initially the PEA method could indicate the space charge distribution in the materials only indirectly. Some data…
A structural phase transition between the cubic (space group, Fm 3 m) and tetragonal (space group, P 4 2 /nmc) phases in a zirconia–ceria solid solution (Zr 1−x Ce x O 2 ) has been observed by Raman spectroscopy. The cubic–tetragonal ( c–t″ ) phase boundary in compositionally homogeneous samples exists at a compositio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence of Silicon Materials: Chains, Sheets, Nanocrystals, Nanowires, Microcrystals, and Porous SiliconLouis BrusCite this: J. Phys. Chem. 1994, 98, 14, 3575–3581Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 Apr…
Processing routes have been developed for the production of thin ceramic films through precipitation from aqueous solutions. The techniques are based on crystal nucleation and growth onto functionalized interfaces. Surface functionalization routes have been developed by the mimicking of schemes used by organisms to pr…
The present study in its form, “Obtaining and evaluating blankets and rubber latex blankets of Shiringa (Hevea brasiliensis), in the district of Chazuta - San Martín was developed in the Faculty of Agroindustrial Engineering, Laboratory of Research and Non-Food Agroindustrial Products Technology, from the National Uni…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Practical Method for the Large-Scale Preparation of [N,N'-Bis(3,5-di-tertbutylsalicylidene)-1,2-cyclohexanediaminato(2-)]manganese(III) chloride, a Highly Enantioselective Epoxidation CatalystJay F. Larrow, Eric N. Jacobsen, Yun Gao, Yaping Hong, Xiaoyi Nie, and Charles M.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray Photoelectron Spectroscopy of CdSe Nanocrystals with Applications to Studies of the Nanocrystal SurfaceJ. E. Bowen Katari, V. L. Colvin, and A. P. AlivisatosCite this: J. Phys. Chem. 1994, 98, 15, 4109–4117Publication Date (Print):April 1, 1994Publication History Publi…
Hohlräume für Neutralmoleküle bieten die im Titel genannten Cluster‐Anionen, die bei Solvothermalsynthesen ohne und mit Et 4 NCl aus [ n Bu 4 N] 3 [H 3 V 10 O 28 ] und PhAsO 3 H 2 in CH 3 OH/H 2 O (99:1) entstehen. Die Strukturen sind schematisch unten gezeigt. magnified image
Dorallcharite, ideally Tl + Fe 3 3+ (SO 4 ) 2 (OH) 6 , is a Tl-Fe member of the alunite-jarosite family. Electron microprobe measurements and a crystal-structure determination show that K substitutes 8.3 to 29.5% (mean 18.6%) of the Tl atoms in the investigated sample. A complete solid-solution series is assumed to ex…
Durch einfaches Erhitzen einer Suspension von [Ph 4 P][VO 2 Cl 2 ] und t BuPO 3 H 2 in Acetonitril im Bombenrohr auf 100°C konnte die erste der drei Titelverbindungen in Form dunkelgrüner Kristalle erhalten werden. Die Struktur dieser Verbindung (Bild rechts) läßt an Einfachheit nichts zu wünschen übrig. Leichte Varia…
A new approach to the study of antiferromagnetic phenomena in terms of the exchange magnetic structure code is examined. If the positions of the magnetic ions are known this code could play the same role in the symmetric description as the international symbol for the crystallographic space group plays in the descript…
The aggregation of cyanine dyes on the surfaces of AgHal microcrystals is examined. It is shown that the photochemical activity of the aggregates in processes involving the spectral sensitisation of photographic materials is determined to a large extent by the occurrence of secondary dark reactions in which photoelect…
Die ungewöhnliche Oxidationsstufe +IV für Eisenzentren kann durch den porphyrinähnlichen Corrolliganden so stabilisiert werden, daß die Verbindungen 1 (R = CI, Ph, OFe‐Corrol) bei Raumtemperatur isolierbar sind. Das sauerstoffverbrückte zweikernige Eisen(IV)‐corrol, das sich leicht in die einkernigen Eisen(IV)‐corrole…
A powder sample of 2M 1 muscovite, (K 0.90 Na 0.07 )(Al 1.63 Fe 0.23 Mg 0.16 Ti 0.03 )(Si 3.20 Al 0.80 )O 10 (OH) 2 , was studied by time-of-flight neutron diffraction at 1 bar and at 2 (± 0.1) GPa. Rietveld refinements of the crystal structure were performed, varying all atomic coordinates in the room-pressure case (…