Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXT4-Boratastyrylstilbene and 1,4-Bis(boratastyryl)benzene: Synthesis, Structural Characterization, and PhotophysicsBun Yeoul Lee and Guillermo C. BazanView Author Information Department of Chemistry, University of California Santa Barbara, California 93106 Cite this: J.…
Adrenodoxin reductase is a flavoenzyme that shuffles electrons for the biosynthesis of steroids. Its chain topology belongs to the glutathione reductase family of disulfide oxidoreductases, all of which bind FAD at equivalent positions. The three reported structures of adrenodoxin reductase were ligated with reduced a…
The design and synthesis of the first electrically conducting main chain photochromic conjugated polymer incorporating dimethyldihydropyrene is reported, as is the demonstration of the corresponding repeat unit as an optoelectronic redox switch.
Metal sulfide semiconductor nanoparticles of CdS and coprecipitated CdS−ZnS, when prepared in reverse micellar systems consisting of cetyl- p -vinylbenzyldimethylammonium chloride (CVDAC), were immobilized via an in situ polymerization of CVDAC, using 2,2‘-azobisisobutyronitrile or visible light irradiation. The nanop…
High-purity palladium films were deposited onto Si wafers and polyimide by the reduction of organopalladium compounds in supercritical CO 2 solution using a batch process at temperatures between 40 and 80 °C and pressures between 100 and 140 bar. Hydrogenolysis of π-2-methylallyl(cyclopentadienyl)palladium(II) in CO 2…
X-ray absorption near edge structure (XANES) of Ti K-edge of Ti−Si mixed oxides and titania supported on silica with various Ti contents was studied to investigate the fractions of Ti−O−Si and Ti−O−Ti bonds quantitatively by fitting the preedge of Ti K-edge with the linear combination of two reference XANES spectra. I…
This work was focused on the relationship between the microstructure and the mechanical and barrier properties of whey protein isolate (WPI) films. Sorbitol (S) and glycerol (G) were used as plasticizers and the pH was varied between 7 and 9. The films were cast from heated aqueous solutions and dried in a climate roo…
A technique for modification of the microtiter reader plates well with a polyaniline (PANI) film sensitive for ascorbic acid is presented. The principle of the analyte detection is based on monitoring the changes in optical absorption of the PANI film resulting from the reduction process initiated by ascorbic acid. Th…
The synthesis of a number pyrrolo-annelated tetrathiafulvalenes, including the parent bis(pyrrolo[3,4-d])tetrathiafulvalene (7) is decribed. Starting from readily available 4,5-bis(bromomethyl)-1, 3-dithiole-2-thione (14) and sodium tosylamide, the parent 7 and the asymmetric monopyrrolo tetrathiafulvalenes 23a,b were…
Rhodamine 6G (R6G)-doped silica gels were prepared through the sol−gel process using dye concentrations ranging from 4.00 × 10 - 6 to 6.40 × 10 - 4 M. The adsorption of the R6G on the porous surface of the silica gels determined the formation of R6G fluorescent J-dimers as concentration increased, in concordance with…
Two uncharged microcrystalline substances, pyrene (PYR) and fluorescein diacetate (FDA), were rendered water dispersible by treatment with various amphiphilic substances and subsequently encapsulated by exposure to an alternating sequence of cationic and anionic polyelectrolytes. The amphiphilic compounds employed to…
We present a detailed analysis of hole dynamics in noble metals (Cu and Au), by means of first-principles many-body calculations. While holes in a free-electron gas are known to live shorter than electrons with the same excitation energy, our results indicate that d-holes in noble metals exhibit longer inelastic lifet…
This paper withdrawn by the authors due to errors in the TEM measurements of the densities and sizes of small islands.
4-Aminobenzoic acid (4-ABA) was covalently grafted on a glassy carbon electrode (GCE) by amine cation radical formation in the electrooxidation process of the amino-containing compound. X-ray photoelectron spectroscopy measurement proves the presence of 4-carboxylphenylamine monolayer on the GCE. The redox responses o…
We examined the effect of radiation damage and annealing on the optical properties of nitrogen-gettered nearly IIa type synthetic diamonds. It was found that the 2.156 eV centre, whose absorption is usually very weak, appears in these diamonds as one of the dominant absorption features. A new vacancy-related vibronic…
Over a wide crystallization temperature ( T c ) range, elongated rectangular lamellar single crystals of syndiotactic polypropylene (s-PP) grown from the melt of thin films exhibit sectorization along both diagonal directions to form the (010) [with the (010) free edge] and the (100) [with the (100) free edge] sectors…
Changes in the hydroxyl surfaces of potassium-acetate-intercalated kaolinite have been studied over the ambient to predehydroxylation temperature range using a combination of X-ray diffraction (XRD) and Raman spectroscopy. Upon intercalation, the kaolinite expanded along the c -axis direction to 13.88 Å. When the inte…
An investigation was made of the sodium lithium niobate Na 0.85 Li 0.15 NbO 3 ceramics using permittivity properties. Permittivity measurements were carried out by impedance spectroscopy in a frequency range of 5 to 1.3×10 7 Hz and at temperatures ranging from 25 to 750 °C. The thermal stability of the dielectric beha…
We studied the crystallization of lysozyme solutions by adding sodium chloride at pH = 4.5, 5.9 and 7.8. A universal crystallization boundary is found if data are scaled according to the salt concentration normalized by the square of the charge at the appropriate pH. Calculations show that this finding is consistent w…
In this paper, we present the design and test performance of the COMICS, the mid-IR instrument for the 8.2 m Subaru Telescope at Mauna Kea. The instrument has both imaging and long slit grating spectroscopy capabilities in the 8-26 micrometers wavelength range. In the camera section, there are selectable three sets of…