Nucleophilic substitution of chlorine atoms in polyvinyl chloride
To modify properties of polyvinyl chloride, its chlorine atoms were substituted using sodium salts of pyrazole, 3,5-dimethylpyrazole, and 2-mercaptobenzimidazole.
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Defection-selective solubilization and chemically-responsive solubility switching of single-walled carbon nanotubes with cucurbit[7]uril
Single-walled carbon nanotubes (SWCNTs) were suspended in aqueous media with cucurbit[7]uril (CB7), while SWCNTs were insoluble with cucurbit[5]uril (CB5). Moreover, defection-selective solubilization of SWCNTs with CB7 was demonstrated.
Elaboration of nanohybrid materials by photopolymerisation of 3,4-ethylenedioxythiophene on TiO2
A method for the elaboration of a heterojunction composed on n-type inorganic semiconducting nanoparticles, TiO(2), and a p-type organic semiconducting polymer poly(3,4-ethylene dioxythiophene) by UV illumination is described.
Formation of Au–Pt bimetallic nanoparticles in a two-layer SiO2 films doped with Au and Pt, respectively, through interlayer diffusion
Bimetallic Au-Pt nanoparticles have been generated inside a relatively porous SiO2 film matrix by a two-layer (2L) coating methodology. Two overlapping coating layers were deposited on glass substrates from Au- and Pt-doped inorganic-organic hybrid silica sols and air dried at 60 degrees C. The 2L coating assembly was…
Characterization of CuAlO2 Thin Films Prepared on Sapphire Substrates by Reactive Sputtering and Annealing
As-deposited films were prepared on sapphire substrates at 500–680 °C by alternately sputtering Cu and Al targets in Ar-diluted O 2 gas atmosphere. The composition of the as-deposited films corresponded to that of the slightly oxygen-rich region of the CuO–CuAl 2 O 4 –Al 2 O 3 system. The films as-deposited at 500 °C…
Chemical Recycling of Poly(Ethylene Terephthalate) Using a New Hybrid Process
In this study, we propose a new hybrid process consisting of glycolysis/methanolysis and then a vapor methanolysis process to obtain dimethyl terephthalate (DMT) and ethylene glycol (EG) in the depolymerization of waste poly(ethylene terephthalate) (PET). Zinc acetate was used to catalyze the reactions. We found that…
Magneto-transport and magneto-dielectric effects in Bi-based perovskite manganites
The study of the substitution of manganese by cobalt in the perovskite (LaBi)MnO3 in view of discovering magneto-dielectric properties in manganites, has allowed the perovskite La1.2Bi0.8Mn1.2Co0.8O6.02 to be selected. This phase is indeed ferromagnetic, like the parent phase La1.2Bi0.8Mn2O6.20, yet with a much higher…
Surface Modification of Carbon Nanotube Networked Films with Au Nanoclusters for Enhanced NO2 Gas Sensing Applications
Multiwalled carbon nanotube (MWCNT) films have been deposited by using plasma‐enhanced chemical vapor deposition (PECVD) system onto alumina substrates, provided with 6 nm thick cobalt (Co) growth catalyst for remarkably improved NO 2 gas sensing, at working temperature in the range of 100–250 ∘ C. Functionalization o…
Spin States at a Tipping Point: What Determines the dz2 Ground State of Nickel(III) Tetra(tbutyl)porphyrin Dicyanide?
Density functional theory (DFT) calculations, regardless of the exchange-correlation functional, have long failed to reproduce the observed dz2(1) ground state of the [NiIII(TtBuP)(CN)2]- anion (where TtBuP is the strongly ruffled tetra(tbutyl)porphyrin ligand), predicting instead a dx2-y2(1) ground state. Normally, s…
Synthesis of mesostructured metal sulfide films using [M(H2O)n](NO3)2:P85 (M = Cd(ii) and Zn(ii)) liquid crystalline mesophases
Transition metal salt–pluronic liquid crystalline (TMS–PLC) mesophases of A–P85, B–P85 and ((1 − x)A + xB)–P85 (where A is [Cd(H2O)4](NO3)2, B is [Zn(H2O)6](NO3)2 and P85 is a triblock copolymer, HO(CH2CH2O)26(CH2(CH3)CHO)40(CH2CH2O)26H) have been used to produce mesostructured metal sulfide films. The TMS–PLC mesopha…
Electronic structure of new AFFeAs prototype of iron arsenide superconductors
This work is provoked by recent discovery of new class prototype systems AFFeAs (A = Sr, Ca) of novel layered ironpnictide High-T c superconductors (T c = 36 K). Here we report ab initio LDA results for electronic structure of the AFFeAs systems. We provide detailed comparison between electronic properties of both new…
New Green and Red Phosphors for White LEDs
High-luminous green phosphors and a red phosphor have been newly developed for white LEDs. The developed green phosphors are Ca3(Sc,Mg)2Si3O12:Ce made by replacing with Mg a part of Sc of green phosphor Ca3Sc2Si3O12:Ce, a new green phosphor CaSc2O4:Ce, and a new host material doped with a rare-earth element, Ba3Si6O12…
The Influences of Hydrogen on Microscopic Plastic Deformation Behavior of SUS304 and SUS316L Stainless Steels
The influences of hydrogen on nano-indentation of stainless steels JIS-SUS304 and JIS-SUS316L with electrochemically-polished surfaces before and after hydrogen exposure were investigated. The “pop-in” behavior, which was presumed to correspond to the onset of catastrophic initial dislocation emissions, was obtained i…
Formation of dodecaphenylporphodimethene via facile protonation of saddle-distorted dodecaphenylporphyrin
A saddle-distorted dodecaphenylporphyrin undergoes protonation followed by two-electron reduction by SnCl(2) to give a roof-shaped dodecaphenylporphodimethene which exhibits reversible one-electron reduction and oxidation behaviour in benzonitrile to allow us to observe an ESR spectrum of pi-cation radical in the cour…
A simple assay to probe disease-associated enzyme activity using glycosaminoglycan-assisted synthesized gold nanoparticles
A simple assay to probe disease-associated enzyme activity using glycosaminoglycan-assisted synthesized gold nanoparticles is reported.
On the evolution of the DyNiO3 perovskite across the metal–insulator transition though neutron diffraction and Mössbauer spectroscopy studies
The structural changes of polycrystalline DyNiO3 perovskite across the metal-insulator transition (TMI = 564 K) have been studied by high resolution neutron diffraction techniques together with Mössbauer spectroscopy, in a sample doped with 1.5 at.% 57Fe. In the insulating (semi-conducting) regime, below T(MI), the pe…
"Hot cores" in proteins: Comparative analysis of the apolar contact area in structures from hyper/thermophilic and mesophilic organisms
BACKGROUND: A wide variety of stabilizing factors have been invoked so far to elucidate the structural basis of protein thermostability. These include, amongst the others, a higher number of ion-pairs interactions and hydrogen bonds, together with a better packing of hydrophobic residues. It has been frequently observ…
Steroidal Glycosides from the Roots of Asclepias curassavica
Twenty-six new acylated-oxypregnane glycosides were obtained along with three known cardenolide glycosides from the roots of Asclepias curassavica (Asclepiadaceae). The new compounds were confirmed to contain 12-O-benzoylsarcostin, 12-O-benzoyldeacylmetaplexigenin, kidjolanin, and 12-O-benzoyltayloron, and one new acy…
Property modification of a high level nuclear waste borosilicate glass through the addition of Fe2O3
The pro rata addition of 0-20 wt% Fe2O3 to a UK high level waste (HLW) borosilicate glass containing 25 wt% model UK HLW has been studied in terms of the effects of Fe2O3 addition on glass chemical durability, thermal properties, density and redox. Mixtures have been successfully melted in Pt crucibles at 1050 and 115…
Study on Corrosion Durability of Ferrocement
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