Materials Literature
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An isotactic polypropene (i-PP) prepared with a metallocene catalyst system and two random copolymers of propene and ethene with 2.8 and 5.7 wt % ethene, respectively (PP- co -E-2.8, PP- co -E-5.7), were isothermally crystallized during simultaneous small- and wide-angle X-ray scattering (SAXS, WAXS) in synchrotron me…
Anionic axial ligands bound to an iron(III) porphyrin complex, Fe(TMP)X, showed a marked influence on the formation of oxoiron(IV) porphyrin intermediates in the reactions of PhIO and m-CPBA.
The hydrothermal reactions of Na2MoO4 x 2H2O and 2,2':6',2"-terpyridine with appropriate salts of Fe(II), Cu(II), and Zn(II) yield a variety of mixed metal oxide phases. The Cu(II) system affords the molecular cluster [Cu(terpy)MoO4].3H2O (MOXI-40 x 3H2O), as well as a one-dimensional material [Cu(terpy)Mo2O7](MOXI-41…
Blends of small particle size fluorinated acrylic copolymer latexes with a large particle size styrene/acrylic copolymer latex were examined with regard to formation of low free energy surfaces, amount of incorporated fluorinated copolymer, particle size, and particle size asymmetry. The styrene/acrylic latex was prep…
Hydrolysis and condensation of (CH 3 COCHCOCH 3 ) 2 SnF(O tert -Am) and (CF 3 COCHCOCH 3 ) 2 Sn(O tert -Am) 2 gave soluble stannic oxo-oligomers or -polymers including fluorine and β-diketonate groups. Under thermal treatment in air at 550 °C, they yielded nanocrystalline fluorine-doped tin dioxide powders. The amount…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionControlling β-Sheet Assembly in Genetically Engineered Silk by Enzymatic Phosphorylation/Dephosphorylation, byS. Winkler, D. Wilson, and D. L. KaplanCite this: Biochemistry 2000, 39, 45, 14002Publication Date (Web):October 2…
The synthesis, crystal structure, magnetic properties, and Mössbauer spectra of [Fe(bpb)2(NCS)2]·0.5CH3OH (1) (bpb = 1,4-bis(4-pyridyl)-butadiyne) are reported. 1 is a singular example of the interpenetration of three mutually perpendicular nets with spin crossover properties.
In this paper, we describe the synthesis of novel amphoteric azopyridine carboxylic acids ( 2b, 3a, 3b, 4a, and 4b ), having both a carboxyl group as a hydrogen donor and a pyridyl group as an acceptor at each molecular terminus, and their self-organization, which is markedly affected by external stimuli including hea…
The novel title compound {NiII4MoV12} demonstrates the concept of generating targeted spin topologies using reduced polyoxometalates: The four electrophilic nickel centersforming a tetrahedronare fixed by a nucleophilic highly reduced diamagnetic ε-Keggin cluster of Td symmetry generated in solution. This cluster not…
The pore surface of MCM-48 mesoporous silica was functionalized with tungsten and molybdenum metal centers by the anhydrous reaction of metal alkoxides with surface silanol groups. Resulting metal−oxo species were attached via covalent M−O−Si bonds as confirmed with photoacoustic (PAS)-FTIR. Diffuse reflectance UV−vis…
The atomic force microscope (AFM) was used to directly measure the forces of interaction between E. coli D21 bacteria and hydrophilic glass or hydrophobic N -octadecyltrichlorosilane (OTS)-treated glass substrates coated with the block copolymers, poly(ethylene glycol) (PEG)−lysine dendron or Pluronic F127 surfactant,…
Polypeptides containing azobenzene or spiropyran units attached to the macromolecules respond to light or dark conditions giving reversible variations of their structure. In this Account we provide a short overview of current research in the field and describe the most significant experimental examples of photorespons…
It is now appreciated that the relationships of proteins, particularly enzymes, within a protein superfamily can be understood not only in terms of their sequence similarities and three-dimensional structures but also by chemical threads that relate their functional attributes. The mechanistic ties among superfamily m…
The interactions between polystyrenesulfonate (PSS)/polyallylamine (PAH) multilayers with human serum albumin (HSA) were investigated by means of scanning angle reflectometry (SAR). We find that albumin adsorbs both on multilayers terminating with PSS (negatively charged) or PAH (positively charged) polyelectrolytes.…
The platinum(II) methyl cation [(N−N)Pt(CH 3 )(solv)] + BF 4 - (N−N = ArN C(Me)C(Me) NAr, Ar = 2,6-(CH 3 ) 2 C 6 H 3, solv = H 2 O ( 2a ) or TFE = CF 3 CH 2 OH ( 2b )) is prepared by treatment of (N−N)Pt(CH 3 ) 2 with 1 equiv of aqueous HBF 4 in TFE. Reaction of a mixture of 2a and 2b with benzene in TFE/H 2 O solutio…
The magnetic field effects on excitons in an InAs nano-ring are studied theoretically. By numerically diagonalizing the effective-mass Hamiltonian of the problem, which can be separated into terms in centre-of-mass and relative coordinates, we calculate the low-lying exciton energy levels and oscillator strengths as a…
A method was developed for measuring the capillary forces arising from microscopic pendular liquid bridges. Results are described for perfectly wetting bridges between spheres of equal and unequal radii. A comparison with the theoretical values calculated from a numerical integration of the Laplace−Young equation demo…
The wavelength corresponding to the extinction maximum, λ max, of the localized surface plasmon resonance (LSPR) of silver nanoparticle arrays fabricated by nanosphere lithography (NSL) can be systematically tuned from ∼400 nm to 6000 nm. Such spectral manipulation was achieved by using (1) precise lithographic contro…
Reactive Ion Etching is an effective method for etching of diamond films, in this paper, the influences of maskant, system pressure and the composition of reactive gas on the etch rate and etched surface of diamond were studied. A gas mixture of O<SUB>2</SUB> and Ar was used as the reactive agent, the concentration of…
Many bacteria have been found to synthesize a family of polyesters termed polyhydroxyalkanoate, abbreviated asPHA. Some interesting physical properties of PHAs such as piezoelectricity, non-linear optical activity, biocompatibility andbiodegradability offer promising applications in areas such as degradable packaging,…