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Abstract In order to construct bimetallic organometallic donor–acceptor complexes with nonlinear optical (NLO) properties, the bimetallic sesquifulvalene complexes [{CpFe(η 5 ‐C 5 H 4 )}Z{η 7 ‐C 7 H 6 )Cr‐(CO) 3 }]BF 4 (2BF 4 ) have been synthesized with different bridging functions Z ( 2a : Z = ‐ 2b : Z = C 2 ; 2c :…
Thermotropic polyglutamates with photochromic azobenzene side groups are polymers of the “hairy rod” type. They form LB multilayer assemblies, in which the rod-like macromolecules are oriented in the dipping direction. The initial LB films have a well-defined bilayer structure in which the rod-like azobenzene moieties…
Tribological properties of molecular films composed of a fullerene monolayer chemically attached to the functional surface of self-assembled monolayers (C 60 −SAM) were studied by friction force microscopy. We observed very high wear stability of composite fullerene films. The friction coefficient (μ) for these films…
Here we describe the synthesis of seven new copolymer series prepared by copolymerization of hexyl isocyanate with seven new chiral azo chromophores with an isocyano functionality. The resulting copolyisocyanates (Nylon 1) possess a helical polymer conformation. In the cases in which the chiral group and polymer chain…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTConjugated Polymers with Main Chain Chirality. 1. Synthesis of an Optically Active Poly(arylenevinylene)†Qiao-Sheng Hu, Dilrukshi Vitharana, Gang-Yu Liu, Vijay Jain, Michael W. Wagaman, Lei Zhang, T. Randall Lee, and Lin PuView Auth…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Template-Induced Incipient Collagen-Like Triple-Helical StructureMurray Goodman, Yangbo Feng, Giuseppe Melacini, and Joseph P. TaulaneView Author Information Department of Chemistry & Biochemistry University of California, San Diego La Jolla, California 92093-0343Cit…
New highly cross-linked polysiloxanes were prepared by sol−gel polymerization of 1,6-bis(diethoxymethylsilyl)hexane ( 1 ) and 1,4-bis(diethoxymethylsilyl)benzene ( 2 ). Hydrolysis and condensation of 1 and 2 under acidic and basic conditions with 4 equiv of water led to the rapid formation of hexylene- and phenylene-b…
Manganese–oxo species grafted onto the internal walls of MCM-41 channels, showing a high redox catalytic activity for hydrocarbon oxidation, are prepared via the reaction of Mn2(CO)10 with Si–OH groups on the surface of mesoporous silica followed by subsequent heat treatment in air.
Zirconium containing mesoporous silicas are synthesized using hexadecylamine as surfactant; the new materials show very interesting properties as catalysts in liquid-phase oxidations with H2O2 and alkyl peroxides.
Four new layered mixed-valence vanadium oxides, which contain interlamellar organic cations, alpha-(H(3)N(CH(2))(2)NH(3))[V(4)O(10)] (1a), beta-(H(3)N(CH(2))(2)NH(3))[V(4)O(10)] (1b), alpha-(H(2)N(C(2)H(4))(2)NH(2))[V(4)O(10)] (2a), and beta-(H(2)N(C(2)H(4))(2)NH(2))[V(4)O(10)] (2b), have been prepared under hydrother…
(1996). New Horizons in Quasicrystals: Research and Applications. Materials Technology: Vol. 11, No. 5, pp. 195-198.
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Supramolecular Chemosensor for Aromatic HydrocarbonsMark A. Mortellaro and Daniel G. NoceraView Author Information Department of Chemistry, Michigan State University East Lansing, Michigan 48824 Cite this: J. Am. Chem. Soc. 1996, 118, 31, 7414–7415Publication Date (W…
The structure and reducibility of ceria clusters was investigated using simulated annealing and interionic potentials, given by Sayle and co-workers (Sayle, T. X. T.; Parker, S. C.; Catlow, C. R. A. Surf. Sci . 1994, 316, 329), which include terms for ionic and van der Waals interactions, overlap repulsions, and ion p…
Due to its semirigid nature, electrically conductive polyaniline (PANI) has long been regarded as an intractable material, i.e. infusible and poorly soluble in organic compounds. Among the rare exceptions is camphorsulfonic acid (CSA) doped PANI, which exhibits good solubility in m -cresol, whereas for other sulfonic…
Nonequilibrium and equilibrium molecular dynamics simulations are reported for a united-atom model of n-decane at a state point in the liquid phase. The viscosity calculated by our nonequilibrium molecular dynamics simulations is in good agreement with that obtained from our equilibrium molecular dynamics simulations…
An infinite stair-like layered ferromagnetic system is obtained from the reaction of K3[CrIII(CN)6] with [NiII-(cyclam)][ClO4]2(cyclam = 1,4,8,11-tetraazacyclotetradecane); a quasi-two-dimensional magnetic behaviour is suggested by the absence of three-dimensional magnetic order down to 2 K.
In order to make a comparison between the properties of low molecular weight poly(phenyleneethynylene) type compounds and the corresponding high molecular weight polymers, we have synthesized oligomers and model molecules of poly(phenyleneethynylene) derivatives by two different routes. This paper describes the synthe…
The synthesis and excited-state dynamics are described for zinc-methylenechlorin−porphyrin−pyromellitimide triads, ZC−HP−I and ZC−ZP−I, and related dyads ZC−HP, ZC−ZP, HP−I, and ZP−I, where ZC, HP, ZP, and I indicate a zinc-methylenechlorin, a free-base porphyrin, a zinc-porphyrin, and pyromellitimide, respectively. I…
A range of mesoporous gallosilicate molecular sieves with the MCM-41 structure have been synthesized using gallium nitrate as the source of gallium and characterized in detail by elemental analysis, XRD, 71 Ga and 29 Si MAS NMR, N 2 adsorption measurements, and TEM. The quality of the products is very sensitive to the…
The resting state structure of the metallocene−alkyl cation, the coordination of the olefin to the preferred resting state structure, and the insertion process of the Ti-constrained geometry catalyst (CpSiH 2 NH)TiR + have been studied with density functional theory. A combined static and dynamic approach has been uti…