Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The photophysical properties of 3,3'-dialkylthiacarbocyanine iodides and chlorides were measured in various solvents. It was found that photoisomerization and fluorescence are the major contributors to the deactivation of the excited singlet state; intersystem crossing occurs with only a very low efficiency. In ethano…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew effective catalysts for Mukaiyama-aldol and -Michael reactions: bismuth trichloride-metallic iodide systemsChristophe Le Roux, Hafida Gaspard-Iloughmane, Jacques Dubac, Joel Jaud, and Pierre VignauxCite this: J. Org. Chem. 1993, 58, 7, 1835–1839Publication Date (Print):M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDependence of the OBDD morphology on diblock copolymer molecular weight in copolymer/homopolymer blendsRichard J. Spontak, Steven D. Smith, and Arman AshrafCite this: Macromolecules 1993, 26, 5, 956–962Publication Date (Print):March 1, 1993Publication History Published onlin…
Based on experimental and modeling studies, the rate of increase in the martensite start temperature M s for the tetragonal‐to‐monoclinic transformation with increase in zirconia grain size is found to rise with decrease in ZrO 2 content in the zirconia‐toughened alumina ZTA system. The observed grain size dependence…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVisible absorption and photocurrent spectra of epitaxially deposited phthalocyanine thin films: interpretation of exciton coupling effectsLai Kwan Chau, Craig D. England, Siying Chen, and Neal R. ArmstrongCite this: J. Phys. Chem. 1993, 97, 11, 2699–2706Publication Date (Pri…
Films of polytetrafluoroethylene (PTFE) were deposited by laser ablation using the fourth harmonic, at 266 nm, of a Nd-YAG laser. The films are found to be stoichiometric with the correct optical properties. We suggest that UV absorption onsets the pyrolitic decomposition of PTFE leading to a monomer that subsequently…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTColloidal dispersions of surfactant-stabilized polypyrrole particlesC. DeArmitt and S. P. ArmesCite this: Langmuir 1993, 9, 3, 652–654Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10…
Relatively low concentrations of randomly substituted off-center ions are known to induce ferroelectric order in highly polarizable crystals. In the case of potassium tantalate (${\mathrm{KTaO}}_{3}$) doped with lithium or niobium, the results of first-order Raman scattering from two hard phonon modes (${\mathrm{TO}}_…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic and mechanistic investigations of the formation of polyimides under homogeneous conditionsY. J. Kim, T. E. Glass, G. D. Lyle, and J. E. McGrathCite this: Macromolecules 1993, 26, 6, 1344–1358Publication Date (Print):March 1, 1993Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal oligo-yne polymers: electronic structures of [-(L)nMC.tplbond.CRC.tplbond.C-]x polymersGilles Frapper and Miklos KerteszCite this: Inorg. Chem. 1993, 32, 5, 732–740Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLong-range attraction between a hydrophobic surface and a polar surface is stronger than that between two hydrophobic surfacesYi Hua Tsao, D. Fennell Evans, and Haakan WennerstroemCite this: Langmuir 1993, 9, 3, 779–785Publication Date (Print):March 1, 1993Publication Histor…
Abstract It is well known that illite-smectite can form from smectite at elevated temperatures in natural and experimental systems. However, the conversion of smectite to illite-smectite is also found in some natural systems that have never been heated. The present experiments show that illite layers can form from sme…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrelation of x-ray crystallographic data and spectroscopic properties of divalent metal complexes of octaethylporphyrinK. D. Stanley, L. Luo, R. Lopez de la Vega, and J. M. E. QuirkeCite this: Inorg. Chem. 1993, 32, 7, 1233–1236Publication Date (Print):March 1, 1993Publica…
Owing to improved manufacturing processes technical ceramics on the basis of oxide as well as nonoxide ceramics have gained an increasing technical potential. Among other joining techniques brazing has proved to be the most flexible joining process that can easily be adapted to various ceramic-metal-combinations. In o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of linear, high-molecular-weight aromatic polyamides by the palladium-catalyzed carbonylation and condensation of aromatic diiodides, diamines, and carbon monoxideRobert J. Perry, S. Richard Turner, and Richard W. BlevinsCite this: Macromolecules 1993, 26, 7, 1509–…
In the first-order Raman spectrum of amorphous carbon (a-C) there is a low-frequency feature in the 200--900-${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ region. This feature is characteristic of the highly disordered amorphous-carbon materials. We note that the intensity of this feature is very sensitive to the thermal…
Abstract The properties of a new, very highly alloyed stainless steel, Avesta 654 SMO, are compared with those of other stainless steels and nickel‐base alloys. The new steel has a very high strength but still possesses a high elongation. The corrosion properties have been investigated in accelerated laboratory tests…
Transmission M\"ossbauer spectra at variable temperatures between 80 and 860 K have been collected for Co-substituted magnetities, ${\mathrm{Co}}_{\mathit{x}}$${\mathrm{Fe}}_{3\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{O}}_{4}$, with x=0.1, 0.2, and 0.4, and at two selected temperatures with the absorber in a longit…
Abstract In this report we present, to our knowledge, the first Raman investigations at single crystalline Ag(111), Ag(110) and microfacetted Ag(110) samples, which were exposed to N 2 or N 2 + reactive gases (oxygen and ethylene). The pressure and temperature ranges are close to those used for industrial oxidation of…
We emphasize the role of the dopant potential on the stability and magnetic properties of bipolarons in a conducting polymer. For this purpose the singlet and the triplet states of a bipolaron have been calculated within an adiabatic deformable continuum model including short-range Coulomb repulsions between electrons…