Nanochemistry and biotechnology

Synthesis of hybrid silica supports for incorporating luminescent complexes of rare earth metals
Tomina V.V.1, Stolyarchuk N.V.1, Vaclavikova M.2, Beganskiene A.3, Kareiva A.3, Melnyk I.V.1,2
1 Chuiko Institute of Surface Chemistry of NAS of Ukraine. General Naumov str., 17, 03164 Kyiv, Ukraine.
E-mail: v.v.tomina@gmail.com
2 Institute of Geotechnics SAS. Watsonova str., 45, 04001 Kosice, Slovak Republic.
3 Vilnius University. Naugarduko str., 24, LT-03225 Vilnius, Lithuania.

The aim of the research was to obtain porous silica-based particles with amino groups available for interaction with rare earth metals (such as Er, Eu, Tb) possessing luminescent properties. Thus, three types of produced samples and their structure-adsorption parameters are featured in the figure. The presence of phenyl groups on the surface improves reactivity of amino functions, but such samples have low specific surface area values. Meanwhile, the incorporation of organic radicals in the siloxane network of the particles (via bissilanes) leads to the formation of well-developed porous structures. Application of bissilanes with phenylene bridges promotes the creation of microporosity in the network.

Acknowledgement: the research was supported by the SASPRO Programme No. 1298/03/01 and the joint Ukrainian-Lithuanian r&d project (M/65-2018)