Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTUmpolung of a Metal−Carbon Bond: A Potential Route to Porphyrin-Based Methane Functionalization CatalystsAndrew P. Nelson and Stephen G. DiMagnoView Author Information Department of Chemistry, University of Nebraska-Lincoln Lincoln, Nebraska 68588-0304 Cite this: J. Am…
Note : No abstract
Transmission electron micrographs (TEM) of UO 2 2+ -negatively stained starburst dendrimers (SBDs), members of the family of dendritic macromolecules, have been analyzed in the absence and in the presence of dimyristoyl-phosphatidylcoline (DMPC) liposomes and mixed DMPC/DMPA-Na (the sodium salt of DMP-colate) liposome…
Enzymatic ring-opening copolymerization of 5-methyl-5-benzyloxycarbonyl-1,3-dioxan-2-one (MBC) with trimethylene carbonate (TMC) was investigated. A route to aliphatic polycarbonates decorated with pendent carboxylic acid groups is demonstrated. Lipase from Pseudomonas fluorescens (AK) was selected to perform the copo…
Lineare, polymere Polyanionen entstehen aus lakunären Polyoxowolframat-Einheiten und Lanthanoid-Ionen (siehe Bild). Angesichts der vielen Lanthanoide und lakunären Polyoxoanionen ist damit eine beträchtliche Zahl an neuen Materialien zugänglich.
Adjusting the pore size and volume of molecular sieve MCM-41 over a very wide range is possible through simple hydrothermal treatment of “off the shelf”, as-synthesized materials in a decyldimethylamine (DMDA)–water emulsion (see schematic representation). The amine/silica ratio as well as the time and temperature of…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHigh Efficiency Near-IR Emission of Nd(III) Based on Low-Vibrational Environment in Cages of Nanosized ZeolitesYuji Wada, Tatsuya Okubo, Munenori Ryo, Toru Nakazawa, Yasuchika Hasegawa, and Shozo YanagidaView Author Information Material and Life Science, Graduate Schoo…
The square hole for the round peg: The first two members of a new family of tetrametallic cyclophanes (1; M=MnI, ReI), which feature rectangular cavities, have been synthesized and characterized. Both of the luminescent compounds behave as mesoporous materials in a thin film and display high capacities and substantial…
The first purely organic BEDT-TTF spin-Peierls system, b'-(ET)2SF5CF2SO3, has been confirmed using a high-frequency electron spin resonance (EPR) cavity perturbation technique. The material exhibits the characteristics of a quasi-one-dimensional (1D) Heisenberg antiferromagnetic spin system above 30 K, but undergoes a…
The physiological inertness of synthetic implant materials often results in insufficient implant integration and limited acceptance of implants in tissues. After implantation the implant surface is often separated from the surrounding healthy and regenerating tissue, for example by a fibrous capsule. To avoid this hos…
Linear polymeric polyanions (see picture) are assembled from lacunary polyoxotungstate building blocks and lanthanide cations. Given the large number of lanthanide and lacunary polyoxoanions available, a considerable variety of new materials is now accessible.
Poly(methylsilane) (PMS) and poly(methylsilane−dimethylsilane) copolymers (P(MS−DMS)) were synthesized by Wurtz type polycondensation reactions of methyldichlorosilane or methyldichlorosilane−dimethyldichlorosilane mixtures in toluene. The obtained polymers were sealed in Pyrex tubes under vacuum and cured with γ-rays…
In-situ generation of trivalent cobalt cations has been investigated for the hydrotalcite-like compounds Mg x Co II 1 - x - y Co III y (OH) 2 (NO 3 ) y · n H 2 O at 25−40 °C under oxygen-containing atmospheres. It is noted that with more involvement of Mg 2+ in the compounds, less Co 2+ cations are needed to maintain…
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…