Materials Literature
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All-optical switching of selectively reflected colors based on isomerization of an azobenzene (Azo) and subsequent change in transmittance was investigated in cholesteric liquid crystals (LCs) which reflect light in the visible region. Photoirradiation at 366 nm, which causes an efficient trans-cis isomerization of Az…
We theoretically study the nonlinear optical response and photoexcited states of the Mott insulators. The nonlinear optical susceptibility χ^(3) is calculated by using the exact diagonalization technique on small clusters. From the systematic study of the dependence of χ^(3) on dimensionality, we find that the spin-ch…
The rheology of rigid rod cellulose whisker suspensions has been investigated. The isotropic-at-rest suspension flow curves show two plateaus, one at low shear rates and another at high shear rates, that reflect the flow of isotropic (at low shear rates) or oriented (at high shear rates) suspensions. From the low shea…
Sonoluminescence is the production of light from acoustically forced bubbles; sonochemistry is a related chemical processing technique. The two phenomena share a sensitive dependence on the liquid phase. The present work is an investigation of the fate and consequences of water vapour in the interior of strongly force…
Shaped silver nanoparticles with spheres, rods, and dendrites have been prepared by a pulse sonoelectrochemical technique from an aqueous solution of AgNO 3 in the presence of nitrilotriacetate N(CH 2 COOH) 3 -NTA. The silver nanoparticles were characterized by using transmission electron microscopy, X-ray diffraction…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFirst Observation of Photoinduced Nitrosyl Linkage Isomers of Iron Nitrosyl PorphyrinsLin Cheng, Irina Novozhilova, Chris Kim, Andrey Kovalevsky, Kimberly A. Bagley, Philip Coppens, and George B. Richter-AddoView Author Information Department of Chemistry State Univers…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFormation of a Novel Luminescent Form of Gold(I) Phenylthiolate via Self-Assembly and Decomposition of Isonitrilegold(I) Phenylthiolate ComplexesRobert E. Bachman, Sheri A. Bodolosky-Bettis, Shana C. Glennon, and Scott A. SirchioView Author Information Department of Ch…
Four years ago, the U.S. Environmental Protection Agency (EPA) ignited a fire storm when it declared that tens of thousands of people were dying each year from breathing tiny particles of dust and soot--and issued tough new regulations to crack down on these pollutants. Industry groups and many scientists assailed the…
The redox states of a series of well-defined hybrid dendrimers based on oligothiophene cores and poly(benzyl ether) dendrons have been studied using cyclic voltammetry and variable-temperature UV/visible/near-IR spectroscopy. The oxidation potentials and the electronic transitions of the neutral, singly oxidized, and…
Starlike HPMA copolymers were synthesized by conjugating semitelechelic poly[N-(2-hydroxypropyl)-methacrylamide] macromolecules (ST-PHPMA, arm) with PAMAM dendrimers (core: G2, G3, G4). ST-PHPMA was synthesized by chain transfer free radical polymerization, and the terminal -COOH was activated with N-hydroxysuccinimid…
The self-assembly of stilbene−cholesterol tethered dyads into fibrous networked structures induces the thermoreversible gelation of several classes of organic solvents. Herein, the gel and solution phases of the gelator, p -α-cholesteryl- p ‘ -octoxystilbenoate ( 1 ), are investigated in 1-butanol- d 10 (gel forming)…
Carbon nonotubes filled with long continuous cobalt nanorods or nanoparticles were synthesized by a simple catalytic process. Co(CO) 3 NO was used as the precursor and served as both the source for the carbon nanotubes and for the cobalt, the catalyst. Some nanotubes filled with nanorods have big heads. The Co-filled…
To clarify effects of crack speed and cross-link density on fracture energy of acrylamide gels, we evaluated the roughness of the fracture surface and measured the fracture energy taking into account the roughness. The fracture energy increases linearly with crack speed $V$ in a fast crack speed region, and the increa…
Monte Carlo and molecular dynamics computer simulations are used to explore the atomic scale structure and dynamics of intercalated PEO/montmorillonite nanocomposites. Particular attention is paid to the configuration of the polymer within these confined spaces. A layered, but disordered and liquid-like, structure is…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTADDITION / CORRECTIONThis article has been corrected. View the notice.First Observation of Light-Induced Excited Spin State Trapping for an Iron(III) ComplexShinya Hayami, Zhong-ze Gu, Motoo Shiro, Yasuaki Einaga, Akira Fujishima, and Osamu SatoView Author Information…
The effect of the thermodynamic selectivity of a solvent on the self-assembly of a styrene−isoprene (SI) diblock copolymer with block molecular weights of 1.1 × 10 4 and 2.1 × 10 4 g/mol is investigated. We explore the phase behavior from the melt state to dilute solution in solvents that are of varying selectivities…
Experimental solubilities are reported for anthracene dissolved in ternary methyl tert -butyl ether + 1-propanol + 2,2,4-trimethylpentane, methyl tert -butyl ether + 2-propanol + 2,2,4-trimethylpentane, methyl tert -butyl ether + 1-butanol + 2,2,4-trimethylpentane, methyl tert -butyl ether + 2-butanol + 2,2,4-trimethy…
The traditional strategy for dealing with slow dynamics is summarized. Direct application of this strategy to supercooled liquids and glasses gives rise to problems. Two types of reduced description, namely, microcanonical and canonical versions of dynamical density functional theories, are explained. The non-equilibr…
A picture for thermodynamics of the glassy state is introduced. It assumes that one extra parameter, the effective temperature, is needed to describe the glassy state. This explains the classical paradoxes concerning the Ehrenfest relations and the Prigogine-Defay ratio. As a second part, the approach connects the res…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSynthesis, Characterization, and Properties of a Lithium 21-Thiaporphyrin ComplexAndreas Gebauer, Joseph A. R. Schmidt, and John ArnoldView Author Information Department of Chemistry, University of California, Berkeley, California 94720 Cite this: Inorg. Chem. 2000, 39, 15, 342…