For the first time, a series of catechol-containing Schiff bases, tetrasubstituted at the lower rim thiacalix[4]arene derivatives in three stereoisomeric forms, cone, partial cone, and 1,3-alternate, were synthesized. The structure of the obtained compounds was proved by modern physical methods, such as NMR, IR spectroscopy, and HRMS. Selective recognition (Kb difference by three orders of magnitude) of copper (II) cation in the series of d-metal cations (Cu2+, Ni2+, Co2+, Zn2+) was shown by UV-vis spectroscopy. Copper (II) ions are coordinated at the nitrogen atom of the imine group and the nearest oxygen atom of the catechol fragment in the thiacalixarene derivatives. High thermal stable organic-inorganic copper-based materials were obtained on the base of 1,3-alternate + Cu (II) complexes.
The relevance of the research consists in the need for effective development of coordination abilities as a basis, new skills and abilities fund formation. The study analyzes the existing approaches and methods for developing this type of abilities, both classical and modern. The attention is drawn to the fact that the manifestations of coordination are extremely diverse, classically related to the direction of the motor task, and completely determine the quality of the exercise, (kinematic and dynamic) characteristics of the movement, namely: time (reaction time, time of motion, tempo), spatial (starting position, posture, body and its links movement in space, differing in direction, amplitude, trajectory), spatiotemporal (speed, acceleration), dynamic (effort), rhythmic structure as a complex characteristic of the technique of motor action (effort proportionality in time and space). In this publication we consider the possibility of improving the development of coordination abilities provided that the hierarchy of the their species formation is taken into account. The hierarchical sequence of coordination abilities types development is presented and justified. A scheme is proposed for the phased implementation of the coordination abilities development. We examine and classify physical exercises as a means of each type of coordination abilities development.
Novel thiacalix[4]arene based ammonium ionic liquids (ILs) containing amino acid residues (glycine and L-phenylalanine) in cone, partial cone, and 1,3-alternate conformations were synthesized by alkylation of macrocyclic tertiary amines with N-bromoacetyl-amino acids ethyl ester followed by replacing bromide anions with bis(trifluoromethylsulfonyl)imide ions. The melting temperature of the obtained ILs was found in the range of 50–75 °C. The effect of macrocyclic core conformation on the synthesized ILs’ melting points was shown, i.e., the ILs in partial cone conformation have the lowest melting points. Thermal stability of the obtained macrocyclic ILs was determined via thermogravimetry and differential scanning calorimetry. The onset of decomposition of the synthesized compounds was established at 305–327 °C. The compounds with L-phenylalanine residues are less thermally stable by 3–19 °C than the same glycine-containing derivatives.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.