Nanocomposites and nanomaterials

Influence of substituents on luminescent properties of metal complexes and polymers based on them
Berezhnytska O.1, Fedorov Ya.1, Savchenko I.2, Rusakova N.3, Trunova O.1
1 V.I.Vernadsky Institute of General and Inorganic Chemistry of NAS of Ukraine, Akad. Palladin Avenue, 32/34, Kyiv-03142, Ukraine. 
E-mail: olekberez@gmail.com
2National Taras Shevchenko University of Kyiv, 64/13, Volodymyrska Street, Kyiv-01601, Ukraine.
3 A.V. Bogatsky Physico-Chemical Institute NASU, 86, Lustdorf road, Odessa- 65000, Ukraine.
The interest in the coordination compounds of lanthanides has both a fundamental and an applied aspect. The first involves the relationship between composition, structure, and properties. The second is due to their utilizing. Today, the part of basic research is declining sharply, due to the demands of modern industry. A significant amount of work is devoted to the applied part, in particular luminescent, conductive, magnetic, and biological properties. Creation of functional materials of special purpose is impossible without fundamental researches which allow define conditions of process and the basic factors of influence on properties of the received materials.
Therefore, a number of -diketonate mono- and heteroligand complexes of lanthanides (III) (Eu, Tb, Sm, Dy, Gd, Nd, Er, Yb) of metal polymers and copolymers based on the following ligands are synthesized in this work:
	
R: -C6H5,  -С12Н9,
-(СН3)2,  -СН(СН3)2

The composition, structure and luminescent properties of the synthesized compounds were defined. It is shown that complexes with aromatic substituents are characterized by higher luminescence efficiency in the case of monoligand complexes. With the adjunction of an additional ligand (phenatrolin, bipyridyl) there is a decrease in the intensity of luminescence. For compounds based on complexes with aliphatic substituents there is an opposite dependence.