Water-Soluble Polyglycidol-Grafted Ladder Calix Resorcinarene Oligomers with Open Chain and Cyclic Topologies: Synthesis, Characteristics, and Biological Evaluation.

Ladder oligomers containing calixarene skeletons in the main chain-calix[4]resorcinarene (CRA) ladder macromolecules with open chain and cyclic macromolecules with double ring-like (Noria-type) topologies-bring particular research attention as functional materials with various applications. However, there is still a remarkable lack of studies into the synthesis of fully water-soluble derivatives of these interesting macromolecules. Research on this topic would allow their bio-based research and application niche to be at least revealed.

Flexible Polymer-Ionic Liquid Films for Supercapacitor Applications.

Mechanically and thermally stable novel gel polymer electrolytes (GPEs) have been prepared and applied in supercapacitor cells. Quasi-solid and flexible films were prepared by solution casting technique and formulated by immobilization of ionic liquids (ILs) differing in their aggregate state. A crosslinking agent and a radical initiator were added to further stabilize them.

Thiol-ene coupling reaction achievement and monitoring by "" UV irradiation NMR spectroscopy.

In this study, the possibilities of a new "" LED UV illumination NMR spectroscopic technique for performing an initiator-free thiol-ene "click" coupling reaction of an allyl-functionalized poly(allyl glycidyl ether) (PAGE) prepolymer with a number of mono- and di-oligo polyethylene glycol (PEG) thiols is demonstrated. The state-of-the-art setup constructed with LEDs as UV light sources that illuminate through optical fibers directly into an NMR testing tube at a fixed wavelength of 365 nm is appropriate for various polymeric materials and biologically active substances. The selected experimental protocol uses a series of periods of irradiation and dark periods, thus providing opportunities to conduct an effective thiol-ene "click" reaction and simultaneously study the kinetics of the photochemical reaction with the exposure time, as well as macromolecular association directly in a solution applying the whole types of NMR methods: from conventional H or C NMR to diffusion NMR spectroscopy (DOSY).

Influence of Macromolecular Architecture on the Optical and Humidity-Sensing Properties of Poly(,-Dimethylacrylamide)-Based Block Copolymers.

The influence of the macromolecular architecture of block copolymers containing poly(,-dimethyl acrylamide) (PDMA) on the optical characteristics and sensing properties of corresponding thin films is discussed. Series of hydrophilic PDMA-based copolymers of different chemical composition and chain architecture such as triblock, star-shaped, and branched were synthesized. The copolymers were characterized using conventional spectroscopic techniques as well as methods for characterization of copolymer macromolecular characteristics in solution, namely size-exclusion chromatography and static light scattering.

Comparative metabolism of N-tert-butyl-N-[1-(1-oxy-pyridin-4-yl)-ethyl]- and N-tert-butyl-N-(1-phenyl-ethyl)-nitroxide by the cytochrome P450 monooxygenase system.

The use of spin-trapping agents for a direct ESR detection of *OH in biological systems is limited by the low stability of the hydroxyl radical-derived nitroxides. Among the various probes used for trapping of *OH, DMSO has proven to be highly efficient. The reaction between *OH and DMSO yields methyl radical (CH(3)*), which can react with N-tert-butyl-alpha-phenylnitrone (PBN) and alpha-(4-pyridyl-1-oxide)-N-tert-butylnitrone (POBN) to form stable, ESR-detectable nitroxides.