Materials Literature
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A K-promoted hydrotalcite-like compound (HTlc) was synthesized and tested for its reversible CO 2 capacity between 250 °C and 500 °C. Nonequilibrium dynamic adsorption and desorption isotherms were measured between 65 Torr and 980 Torr, using steps of 20 or 50 Torr and a 45-min duration between steps. The absolute CO…
Highly efficient synthesis of meso,meso-dibromo doubly and triply fused diporphyrins has been achieved through a powerful oxidative coupling mediated by AuCl3-AgOTf combination. In addition, palladium-catalyzed debromination of meso-bromoporphyrins has been developed. This debromination protocol enables employment of…
Novel silver nanoparticles/polyaniline composites were obtained through a two-phase water/toluene interfacial reaction. We show that by rigorously controlling the reaction time, different structures of the nanocomposites can be obtained, such as a thin sheet of polyaniline around the silver nanoparticles or a polymer…
This paper presents the results of a study on the effects of water, acetic acid (CH3COOH), oxygen, corrosion inhibitor, chloride, methanol (CH3OH), denaturant, and corrosion product on the stress corrosion cracking (SCC) of steel in ethanol (C2H5OH). The factor that was found to have the greatest effect on causing SCC…
Organoboron-based diarylethene was successfully synthesized and exhibited photochromic property. Furthermore, its photochromic property can be modulated by a fluoride ion. The absorption maximum of the photostationary state shifted from 655 to 490 nm upon addition of a fluoride ion. The modulation mechanism is attribu…
BACKGROUND AND PURPOSE: Stones break better when the rate of shockwave (SW) delivery is slowed. It has been hypothesized that the greater cavitation accompanying a fast rate shields pulse propagation, thus interfering with the delivery of SW energy to the stone. We tested this idea by correlating waveforms measured at…
The complex [gamma(1,2)-SiW(10){Fe(OH(2))}(2)O(38)](6)(-) (1) has been reported to catalyze the much sought reductant-free selective O(2)-based epoxidation of alkenes (Nishiyama, Y.; Nakagawa, Y.; Mizuno, N. Angew. Chem. Int. Ed. 2001, 40, 3639-3641) in chlorocarbon-acetonitrile solution. The challenge of reproducing…
Engineered nanoparticles are an important tool for future nanomedicines to deliver and target drugs or bring imaging agents to the targets where they are required. Since the original application of liposomes in the 1970s, a wealth of carrier and imaging systems has been developed, including magnetoliposomes, dendrimer…
A series of bamboo-like CN(x)() nanotubes have been synthesized from pyridine precursor by chemical vapor deposition with bimetallic Fe-Co/gamma-Al(2)O(3) catalyst in the range of 550 approximately 950 degrees C. An unusual predomination of pyridinic nitrogen over graphitic nitrogen has been observed for the CN(x)() n…
Bioencapsulation in silica gels has become a very popular field of research, leading to the design of biosensors and bioreactors. If pure silica gels appear suitable to maintain the biological activity of entrapped enzymes, there are many cases where hybrid materials are necessary to reach the long-term preservation o…
The synthesis, complexation, and photophysical properties of the Eu(III)-based quinoline cyclen conjugate complex Eu1 and its permanent, noncovalent incorporation into hydrogels as sensitive, interference-free pH sensing materials for biological media are described. The Eu(III) emission in both solution and hydrogel m…
A useful method for the synthesis of various gold nanostructures is presented. The results demonstrated that flowerlike nanoparticle arrays, nanowire networks, nanosheets, and nanoflowers were obtained on the solid substrate under different experimental conditions. In addition, surface-enhanced Raman scattering (SERS)…
A combination of cyclic voltammetry (CV), UV-vis-NIR spectroscopy and spectroelectrochemistry, hyper-Rayleigh scattering (HRS) [including depolarization studies], Z-scan and degenerate four-wave mixing (DFWM) [including studies employing an optically transparent thin-layer electrochemical (OTTLE) cell to effect electr…
Although the transfer of hydrophobicity to the outer surface of the pollution on silicone rubber insulators is found to be a slow process, the findings of this work indicate that its completion is not necessary to achieve near-full benefit. It is proposed that the techniques used for these studies can be readily adopt…
Abstract Density functional theory (DFT) was used with the B3LYP gradient‐corrected exchange–correlation functional to study the mechanism for the reaction of H 2 + ${1 \over 2}$ O 2 → H 2 O over a Pt catalyst via direct oxygen reduction. Within these studies we first examined the binding characteristics and energetic…
Poly(9,9-dioctylfluorene) (PFO) adopts a particular type of conformation in dilute solutions of the poor solvent methylcyclohexane (MCH) below 273 K, which is revealed by the appearance of a red-shifted absorption peak at 437−438 nm. The formation of this ordered conformation depends on the temperature but is independ…
Letters1 August 2006Nephrogenic Fibrosing Dermopathy and High-Dose Erythropoietin TherapySundararaman Swaminathan, MBBS, Iftikhar Ahmed, MD, James T. McCarthy, MD, Robert C. Albright, DO, Mark R. Pittelkow, MD, Noel M. Caplice, MD, PhD, Matthew D. Griffin, MB BCh, and Nelson Leung, MDSundararaman Swaminathan, MBBSFrom…
Very efficient stabilization of the photoinduced charge-transfer state was achieved in simple subphthalocyanine-ferrocene dyads, reaching radical pair lifetimes of about 0.2 ms.
A nanocomposite of poly(anilineboronic acid), a self-doped polyaniline, with ss-DNA-wrapped single-walled carbon nanotubes (ss-DNA/SWNTs) was fabricated on a gold electrode by in situ electrochemical polymerization of 3-aminophenylboronic acid monomers in the presence of ssDNA/SWNTs. We used this nanocomposite to dete…
The polymorphic transformations associated with the plastic deformation of isotactic polypropylene samples of different stereoregularity, prepared with different metallocene catalysts, have been studied. Crystals of alpha or gamma forms, present in the unstretched samples, transform into the mesomorphic form by stretc…