Bis[iridium(I)] Complex of Inverted N-Confused Porphyrin
The reaction of N-confused tetraphenylporphyrin with IrCl(CO)2(p-toluidine) gave a novel bis[iridium(I)] complex, wherein the confused pyrrole ring took an inverted conformation.
Materials Literature
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Composite right/left-handed transmission line metamaterial phase shifters (MPS) in MMIC technology
This paper presents the modeling and design of one-dimensional metamaterial phase shifters (MPSs) in monolithic-microwave integrated-circuit technology based on the composite right/left-handed transmission-line approach. From a theoretical point-of-view, we show that existing design expressions are restricted to phase…
In Situ Transient FTIR and XANES Studies of the Evolution of Surface Species in CO Oxidation on Au/TiO2
The adsorption of CO and its reaction with oxygen were investigated using a combination of in situ Fourier transform infrared spectroscopy, step response measurements in a microreactor, (18)O isotopic labeling, and X-ray absorption near edge structure spectroscopy. An as-prepared sample in which Au is present as a sur…
Novel microstrip backward coupler with metamaterial cells for fully planar fabrication techniques
Abstract By using a recently proposed approach to synthesize 1D metamaterials in planar circuit technology, compatible with fully planar fabrication techniques, a novel backward coupler has been designed and fabricated. It has been implemented in microstrip technology by means of complementary split‐ring resonators (C…
SnO2 Nanoparticle-Functionalized Boron Nitride Nanotubes
Boron nitride nanotubes (BNNTs) were synthesized by a carbon-free chemical vapor deposition method using boron and metal oxide as reactants. Then SnO(2) nanoparticles were functionalized on them via a simple wet chemistry method. Detailed transmission electron microscopy (TEM) observations reveal that SnO(2) nanoparti…
The electronic structure of oxo-Mn(salen): Single-reference and multireference approaches
Using single- and multireference approaches we have examined many of the low-lying electronic states of oxo-Mn(salen), several of which have not been explored previously. Large complete-active-space self-consistent-field (CASSCF) computations have been performed in pursuit of an accurate ordering for the lowest severa…
Meta-Linked Poly(phenylene ethynylene) Conjugated Polyelectrolyte Featuring a Chiral Side Group: Helical Folding and Guest Binding
A water soluble, meta-linked poly(phenylene ethynylene) featuring chiral and optically active side groups based on L-alanine (mPPE-Ala) has been studied by using absorption, fluorescence, and circular dichroism spectroscopy. Studies of mPPE-Ala in methanol/water solvent mixtures show that the polymer folds into a heli…
Kinetics of Hydrogen Production upon Reduction of Aqueous TiO2 Nanoparticles Catalyzed by Pd0, Pt0, or Au0 Coatings and an Unusual Hydrogen Abstraction; Steady State and Pulse Radiolysis Study
Reduction of H(+) by TiO(2) electrons (e(TiO)(2)(-)) in aqueous colloidal solution takes place in the presence of surface metal catalysts. The catalytic reduction gives rise to adsorbed hydrogen atoms. In the presence of Pd(0) or Pt(0), material balance shows that most of the adsorbed H atoms combine to molecular hydr…
Inkjet Printing of Oxidants for Patterning of Nanometer‐Thick Conducting Polymer Electrodes
Inkjet printing of a hydrogen-peroxide-based “ink” is used to oxidize conducting polymer thin films to produce patterned organic LEDs. Picoliter droplets of hydrogen peroxide oxidize the PEDOT film, rendering well- defined areas on the electrode non- electroluminescent. The figure shows a computer-generated image and…
First-principles prediction of the mechanical properties and electronic structure of ternary aluminum carbideZr3Al3C5
In this paper, we predicted the possible mechanical properties and presented the electronic structure of ${\mathrm{Zr}}_{3}{\mathrm{Al}}_{3}{\mathrm{C}}_{5}$ by means of first-principles pseudopotential total energy method. The equation of state, elastic parameters (including the full set of second order elastic coeff…
Synthesis and Properties of Novel Polyurethane−Urea/Multiwalled Carbon Nanotube Composites
In this paper, a new method based on sol−gel process was developed to prepare polymer/carbon nanotube composites. By modifying the multiwalled carbon nanotube (MWNT) with coupling agent, MWNT was introduced into the polyurethane−urea (PU) system by chemical linkages, and a series of novel self-cross-linkable PU/MWNT c…
Assessment of Several Hybrid DFT Functionals for the Evaluation of Bond Length Alternation of Increasingly Long Oligomers
We have optimized the ground-state geometry of nine series of increasingly long oligomers, using six hybrid density functionals (O3LYP, B3LYP, B97-1, B98, PBE0, and BHHLYP) combined with three different atomic basis sets. In each case, the obtained bond length alternation (BLA) is compared to the corresponding MP2 val…
Stable Blue Emission from a Polyfluorene/Layered‐Compound Guest/Host Nanocomposite
Abstract In this study a blue‐light‐emitting conjugated polymer, poly(9,9‐dioctylfluorene), is confined to the interlayer space of inorganic, layered metal dichalcogenide materials, metallic MoS 2 , and semiconducting SnS 2 . The nanocomposites are prepared through Li intercalation into the inorganic compound, exfolia…
Dielectric properties of glycerol/water mixtures at temperatures between 10 and 50°C
At six temperatures T between 10 and 50 degrees C and at mole fractions x(g) of glycerol (0<x(g)<or=0.9) the complex (electric) permittivity epsilon(nu) of glycerol/water mixtures has been measured as a function of frequency nu between 1 MHz and 40 GHz. The spectra of the glycerol/water mixtures can be well represente…
New Luminescent Europium(III) Chelates for DNA Labeling
The new europium(III) chelate [2,2',2'',2'''-[[4'-(aminobiphenyl-4-yl)-2,2':6',2''-terpyridine- 6,6''-diyl]bis(methylenenitrilo)]tetrakis(acetato)] europium(III) (ATBTA-Eu3+) and its 4,6-dichloro-1,3,5-triazinyl and succinimidyl derivatives (DTBTA and NHS-ATBTA, respectively) were synthesized and characterized. Both l…
Functionalized Poly(α-hydroxy acid)s via Ring-Opening Polymerization: Toward Hydrophilic Polyesters with Pendant Hydroxyl Groups
Two functionalized dilactones with protected hydroxyl groups, benzyloxymethyl methyl glycolide ( 4a ) and benzyloxymethyl glycolide ( 4b ), were synthesized and converted to the corresponding polyesters by ring-opening polymerization in the melt (at 110 °C using benzyl alcohol and SnOct 2 as initiator and catalyst, re…
Prediction of chirality- and size-dependent elastic properties of single-walled carbon nanotubes via a molecular mechanics model
Molecular mechanics has been widely used to analytically study mechanical behaviour of carbon nanotubes. However, explicit expressions for elastic properties of carbon nanotubes are so far confined to some special cases due to the lack of fully constructed governing equations for the molecular mechanics model. In this…
Phase Diagram for Self-assembly of Amphiphilic Molecule C12E6 by Dissipative Particle Dynamics Simulation
In a previous study, dissipative particle dynamics simulation was used to qualitatively clarify the phase diagram of the amphiphilic molecule hexaethylene glycol dodecyl ether (C12E6). In the present study, the hydrophilicity dependence of the phase structure was clarified qualitatively by varying the interaction pote…
Analysis of Nanoparticle Transmission Electron Microscopy Data Using a Public- Domain Image-Processing Program, Image
The need to easily and quickly count larger numbers of nanoparticles, in order to obtain statistically useful size and size-distribution data, is addressed via the use of a readily available, free, public-domain program for particle counting, NIH-Image (and 2 others derived from it, Scion Image and Image J), collectiv…
Heat capacity and phonon mean free path of wurtzite GaN
We report on lattice specific heat of bulk hexagonal GaN measured by the heat flow method in the temperature range 20-300 K and by the adiabatic method in the range 5-70 K. We fit the experimental data using two temperatures model. The best fit with the accuracy of 3 % was obtained for the temperature independent Deby…