Summary: In industrial practice involving mixtures of raw materials, it is desirable to be able to predict how a change in their proportions will affect the product's properties. In this work the effect of three major vulcanized rubber raw materials was investigated. All other raw materials, as ...
The purpose of the paper is the investigation of the dielectric properties with respect to the plasticizer content in PVC materials. This polymer type is widely used as insulating and jacket material of cables in different areas of electric power engineering e.g. power plants. The dielectric rel...
The dynamic rheological behavior of poly(vinyl chloride) (PVC)/dioctyl phthalate (DOP) systems were studied as a function of DOP content and melting temperature. The dynamic rheological behavior of the PVC/DOP systems was found to be remarkably affected by the DOP content. The observed curves of...
Upon photoirradiation at 365 nm, platelike microcrystals of trans-4-aminoazobenzene quickly bend away from the light source, returning to their initial linear shape when irradiation was terminated. However, relative to the observations upon cessation of 365 nm irradiation, the bent crystals reco...
Dye-fibre interactions were modelled for a series of 20 disperse dyes on cellulose fibre by means of the Free-Wilson and MTD (minimum steric difference) methods. Both methods indicate good correlations with dye affinities R = 0 999 and s = 0 317 for the Free-Wilson analysis and R = 0 895, s ...
A sensitive method for the determination of nitrites is proposed. The method should also be applicable to the determination of nitrogen dioxide. The test consists of the reaction of 4-amino azobenzene and I-naphthylamine with nitrous acid to form the blue di-cation of 4-(p-phenylazophenylazo)-I-...
An alternating copolyamide derived from 4-aminobutyric acid and α-isobutyl-l-glutamate has been synthesized by the active ester method, and subsequently characterized. The structure and morphology of lamellar crystals have been investigated by using transmission electron microscopy. Additional ...
A HPLC method, involving pre-column derivatisation with o-phthalaldehyde and fluorescence detection, is described. It allows the resolution of aspartate, glutamate, taurine and GABA, in a single run with detection limits of 3.2, 1.7, 1.4 and 2 fmol/μl of perfusate, respectively. It is sufficien...
GABA (4-aminobutyric acid) is a ubiquitousnon-protein amino acid that accumulates rapidly inplants in response to stress. GABA was firstidentified in plants (potato tubers) and animals(brain tissue) 50 years ago. Although GABA is nowrecognized as the most important inhibitoryneurotransmitter in ...
[4-(Diethylamino)phenyl]dichlorophosphine synthesized for the first time has reacted with trialkyl orthoformate and ethylene oxide in the presence of ethyl chloroacetate with the formation of phosphorylated formals and ethyl [4-(diethylamino)phenyl](2-chloroethoxy)phosphonyl acetate, a precursor...
The synthesis and characterization of the first series of low‐coordinate bis(terphenyl) complexes of the Group 12 metals, [Zn(2,6‐Naph2C6H3)2] (1), [Cd(OEt2)(2,6‐Naph2C6H3)2] (2) and [Hg(OEt2)(2,6‐Naph2C6H3)2] (3) (Naph=1‐C10H7) are described. The naphthyl substituents of the terphenyl liga...
Indium(I)chloride reacts with LiArMe6 (ArMe6=C6H3-2,6-(C6H2-2,4,6-Me3)2) in THF to give three new mixed-valent organoindium subhalides. While the 1:1 reaction of InCl with LiArMe6 yields the known metal-rich cluster In8(ArMe6)4 (1), the use of freshly prepared LiArMe6 led to incorporation of iod...
A general approach to the first compounds that contain rhenium–germanium triple and double bonds is reported. Heating [ReCl(PMe3)5] (1) with the arylgermanium(II) chloride GeCl(C6H3‐2,6‐Trip2) (2; Trip=2,4,6‐triisopropylphenyl) results in the germylidyne complex mer‐[Cl2(PMe3)3ReGeC6H3‐2...
In this work, we have developed linear micro‐patterns of phosphotungstic acid soft oxometalate (SOM) and perylene (as fluorophore) hybrid composite on a glass substrate using a thermo‐optical tweezers set‐up, and used it for sensing of biologically important molecules such as glucose, uric ac...
Two donor-σ-acceptor-σ-donor triads incorporating tetrathiafulvalene (TTF) and 3,4,9,10-perylene tetracarboxylic diimides (PDI) units were synthesized. The structures of the triads and their intermediates were characterized by 1 H NMR, 13 C NMR, MS, IR. The results of UV–vis a...
Novel bispinacolborane‐N,N′‐bis(octyl)‐3,4,9,10‐perylenetetracarboxylic acid bisimide (PBI) was synthesized in high yield. The title compound is a key intermediate in the preparation of PBI aryl derivatives through Suzuki cross‐coupling by using a large variety of easily accessible aryl ha...
The synergistic action of a photosensitizer (PS), light, and oxygen is exploited in photodynamic therapy (PDT) to kill cancer cells with reduced side‐effects compared with traditional chemotherapeutic treatments. In this regard, new PSs are still necessary to improve the efficacy and the outcom...
A series of perylene‐3,4:9,10‐bis(dicarboximide) (PBI) and perylene‐3,4:9,10‐bis(benzimidazole) (PTCBI) derivatives that are di‐ or tetra‐substituted at the bay region by electron‐donating or electron‐withdrawing groups have been synthesized as soluble n‐type semiconductors. Optical abs...
The reaction of PTCDA (perylene‐3,4,9,10‐tetracarboxylic dianhydride) with an alcohol, a bromoalkane, and an alkylamine in the presence of DBU in DMF yields imido‐diester‐substituted perylenes. The reaction is limited to polar alcohols such as propanol, but longer alkyl chains are efficientl...
An efficient one‐pot reaction has been developed for the synthesis of 2,3‐dichloroquinoxaline derivatives 3a–n. The reaction was performed in two steps via a silica gel catalyzed tandem process from o‐phenylenediamine and oxalic acid, followed by addition of phosphorus oxychloride (POCl3). A...
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