The development of chemistry of free nitroxyl radicals puts a number of new problems before the researchers. It is possible to subdivide nitroxyl radicals into two independent groups: nitroxides and iminoxyls. due to pronounced difference in their reactivity. To specify the concept of stability of a substance it is necessary to reconsider the ideas concerning the discovery of the first stable f...

1. Introduction A drastic slowdown of the dynamics of a liquid close to its glass transition temperature is observed in many different materials ranging from simple molecular glass formers to complex synthetic polymers. The non-exponential relaxation dynamics and non-Arrhenius type of temperature dependence of mean relaxation times has been observed by many ensemble techniques such as EPR, NMR ...

A series of water-soluble polymers and derivatives with chelating groups has been prepared and investigated for the complex formation with various metals. The complexation of basis polymers, such as poly(ethyleneiruine) , poly(vinylamine) , and poly(acrylic acid), as well as copolymers was carried out in homogeneous phase. Membrane filtration allowed continuous or discontinuous separation of th...