Nanocomposites and nanomaterials

New hybrid nanosystems based on curcuminativs of some lanthanides

Rohovtsov O. 1, Berezhnytska O. 1,2, Ivakha N. 1, Smola S. 3, Trunova O. 1
1V.I.Vernadsky Institute of General and Inorganic Chemistry NASU, Kyiv, Ukraine E-mail: olekberez@gmail.com
2National Technical University of Ukraine “Igor Sikorsky Kiev Polytechnic Institute”, Peremohy ave., Kyiv, 3703056, Ukraine 
3A.V. Bogatsky Physico-Chemical Institute NASU, Odessa, Ukraine

Nanosystems of the required composition with predictable properties are materials of the future. The main characteristic of nanosystems is their dispersion, since it is directly related to the properties of such systems. An important aspect is the selection of a carriers for creating materials, since this will allow not only to obtain new hybrid structures, but also to establish the relationship between the properties of classical complexes and heterostructures based on them, taking into account the nature, dispersion and morphology of the carriers. It is known that the introduction of biologically active compounds into liposomes, or their attachment to various carriers, allows stabilizing the system and increasing its efficiency as a result of targeted delivery. In this work, we have developed new approaches to the synthesis of biologically active nanodispersed systems based on coordination compounds of lananoids with their subsequent covalent binding on the surface of highly dispersed carriers.
The objects of study were curcuminates Eu (III), Gd (III), Dy (III) and hybrid systems based on them. Kaolin, haloisite, and POSS were used as carrier matrices. The hybrid systems were obtained in two ways: by grafting metal complexes onto the surface of the carriers, and by sequentially addition all the components into the reaction mixture. It was found that the maximum efficiency of fixing with the formation of uniform structures can be achieved by heterophase synthesis, in which all components are added into the reaction medium gradually. The fixing efficiency depends on the morphology and dispersion of the carriers and the electronic structure of the central metal ion. 
Thus, the studies carried out made it possible to develop a methodology and basic approaches to the synthesis of hybrid systems by covalent bonding of complexes on the surface of aluminosilicate and oligomeric matrices.