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Vol 466, No 1 (2016)
- Year: 2016
- Articles: 6
- URL: https://journals.rcsi.science/0012-5008/issue/view/9202
Chemistry
1-2
Bis(porphyrin)-3,4:9,10-perylenetetracarboxydiimide triads as new building blocks for the synthesis of aromatic polyethers
Abstract
It was shown that aromatic polyethers (APs) containing in the main chain bis(porphyrin) perylenediimide triads as new building blocks can be obtained. Thermal properties of the prepared APs showing high glass transition temperature were studied. Negative photoresists based on the final unsaturated polymer and anthrylsulfonium salt were designed.
3-7
New routes to the preparation of gem-cyclopentenedicarboxylic acid derivatives
Abstract
A new route was developed to design esters of gem-dicarboxylic acids of cyclopentene series by CH alkylation of diethyl malonate with cis-1,4-dichlorobutene. Diethyl cyclopent-3-ene-1,1-dicarboxylate was reacted with dichlorocarbene. The structures of the isolated compounds were described in detail by 1H, 13C NMR spectroscopy and GC–MS.
8-10
Thermophysical properties and crystal structure of high-purity monoisotopic 80Se
Abstract
The thermophysical and structural characteristics of high-purity monoisotopic 80Se containing 99.9 at % main isotope were studied. Differences were found in properties between monoisotopic selenium and selenium of the natural abundance of isotopes, which had comparable chemical purities and identical thermal histories.
11-14
Chemical Technology
Effect of small amounts of metal/carbon nanocomposites on the properties of polymer materials
Abstract
Metal/carbon nanocomposites have been studied by electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS). EPR study has revealed the existence of delocalized electrons on the carbon shells and the presence of reduced paramagnetic states of nickel in the nickel/carbon nanocomposite. XPS has detected the change in the atomic magnetic moment of the metal. For polycarbonate as an example, conditions for modification of the polymer composition with small amounts of metal/carbon nanoparticles (0.01–0.0001%) have been determined. On the basis of the data obtained, a mechanism of the effect of metal/carbon nanoparticles on the structure and properties of polymer materials has been suggested.
15-17
18-20