Materials Literature
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Abstract The clay mineral distribution in the Early Cretaceous depositional sequences along the Cameros Basin has been established on the basis of XRD traces and TEM/EDAX analyses. Samples from the Latest Berriasian-Barremian depositional sequences are characteristic of epimetamorphic conditions. Illite ‘crystalliniti…
Abstract A detailed force‐field‐based evaluation of the molecular geometries of small‐ring cyclodextrins 1–3 with three, four, and five α(1→4)‐linked glucose residues and the starch‐derived α‐cyclodextrin ( 4 ) was performed by using molecular mechanics and high‐temperature annealing. The resulting minimum‐energy stru…
A new class of functional units for preparing charge transfer salts , based on π‐stacks of a conducting oligomer in analogy to the well‐known stacks of TTF units, is reported and provides a connection between CT salts and conducting polymers. The synthesis of the new water‐soluble thiophene oligomer is presented and i…
Abstract Attempts to prepare various peripheral tetra‐ and octasubstituted (phthalocyaninato)iron derivatives R n PcFe [ n = 4: R = CH 2 OEt ( 6e ), CO 2 Et ( 6h ), CO 2 ‐ n ‐C 6 H 13 ( 6l ), O(2‐Et‐ n ‐C 6 H 13 ) ( 6j ), OCH 2 C(CH 3 ) 3 ( 6k ), OCH 2 C(CH 3 ) 2 CH 2 Ph ( 6l ); n = 8: R = CH 2 CH(CO 2 Me)CH(CO 2 Me)C…
The third‐order nonlinear optical susceptibilities χ (3) of M 2 O‐B 2 O 3 (M = Li, Na, K, Rb, Cs, and Ag) binary borate glasses have been measured by the third harmonic generation (THG) method. It is found that the enhancement of χ (3) by the structural change of BO 3 units to BO 4 units is small, while the enhancemen…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Coupling and 1H NMR Spectroscopy of Binuclear Copper(II) ComplexesJoseph H. Satcher Jr. and Alan L. BalchCite this: Inorg. Chem. 1995, 34, 13, 3371–3373Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June 1995ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrophobic Nature of Membrane-Spanning .alpha.-Helical Peptides as Revealed by Monte Carlo Simulations and Molecular Hydrophobicity Potential AnalysisRoman G. Efremov and Gerard VergotenCite this: J. Phys. Chem. 1995, 99, 26, 10658–10666Publication Date (Print):June 1, 1995…
The surface layer of crystalline silicon implanted with 1.5 MeV Si ions with doses ranging from 1×1011 to 1×1015 Si+/cm2 has been studied by Raman scattering. Raman line intensities, shapes and shifts have been used to investigate the defects in the near-surface layer. Above doses of 1×1013 Si+/cm2, Raman provides evi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Stability Studies on a Homologous Series of NitroarenesJimmie C. Oxley, James L. Smith, Hong Ye, Robert L. McKenney, and Paul R. BolducCite this: J. Phys. Chem. 1995, 99, 23, 9593–9602Publication Date (Print):June 1, 1995Publication History Published online1 May 2002…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEvidence of the Importance of Back-Bonding in Determining the Behavior of Ruthenated Cyanophenyl Cobalt Porphyrins as Electrocatalysts for the Reduction of DioxygenBeat Steiger and Fred C. AnsonCite this: Inorg. Chem. 1995, 34, 12, 3355–3357Publication Date (Print):June 1, 1…
The dynamic behavior of atoms in the more regular and more disordered regions in a molecular dynamics model of glassy argon is investigated. Partial velocity autocorrelation functions and their Fourier transforms are calculated for both types of regions. It is found that the more disordered regions are responsible for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKey Intermediate Product of Oxidative Degradation of Photochromic Spirooxazines. X-ray Crystal Structure and Electron Spin Resonance Analysis of Its 7,7,8,8-Tetracyanoquinodimethane Ion-Radical SaltVincenzo Malatesta, Roberto Millini, and Luciano MontanariCite this: J. Am. C…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Energetics of Helix Formation by Short Templated Peptides in Aqueous Solution. 1. Characterization of the Reporting Helical Template Ac-Hel1D. S. Kemp, Thomas J. Allen, and Sherri L. OslickCite this: J. Am. Chem. Soc. 1995, 117, 25, 6641–6657Publication Date (Print):June…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of Liquid Crystalline Phosphazenes Containing Chiral MesogensHarry R. Allcock and Eric H. KlingenbergCite this: Macromolecules 1995, 28, 13, 4351–4360Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June 1995htt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT"In Situ" Raman Spectroelectrochemical Studies of Poly(3,3'-dibutoxy-2,2'-bithiophene)A. Pron, G. Louarn, M. Lapkowski, M. Zagorska, J. Glowczy-Zubek, and S. LefrantCite this: Macromolecules 1995, 28, 13, 4644–4649Publication Date (Print):June 1, 1995Publication History Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb Initio Study of the Ring-Opening Reactions of Pyran, Nitrochromene, and SpiropyranPaul N. Day, Zhiqiang Wang, and Ruth PachterCite this: J. Phys. Chem. 1995, 99, 24, 9730–9738Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inis…
Abstract The propagation rate coefficient K p of the free‐radical bulk polymerization of styrene is determined between 30 and 90°C up to a maximum pressure of 2800 bar. The data from pulsedlaser polymerizations and product analyses by gel‐permeation chromatography (PLP‐GPC) are adequately represented by the expression…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlatinum(II) Bis(.beta.-diketonates) as Photoactivated Hydrosilation CatalystsFrederick D. Lewis and Gwen D. SalviCite this: Inorg. Chem. 1995, 34, 12, 3182–3189Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Published inissue 1 June 1995ht…
The collisional deactivation of highly vibrationally excited NO2 and CS2 by a variety of buffer gases has been examined by time-resolved Fourier transform IR emission spectroscopy. The results show that there is a dramatic increase in the average energy removed per collision for NO2 excited above ∼10 000 cm−1 and for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrocalorimetric and Infrared Spectroscopic Studies of CO, C2H4, N2O, and O2 Adsorption on Cu-Y ZeoliteG. D. Borgard, S. Molvik, P. Balaraman, T. W. Root, and J. A. DumesicCite this: Langmuir 1995, 11, 6, 2065–2070Publication Date (Print):June 1, 1995Publication History Pub…