International Summer School PROGRAM - Laboratoire d'Infochimie ...

PENDANT AZOBENZOCROWN ETHERS
IN POTASSIUM SENSORS
Mirosław Szarmach, Juliusz Makowski, Ewa Wagner-Wysiecka, Elżbieta Luboch
Gdansk University of Technology, Faculty of Chemistry,
Department of Chemical Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
Due to wide possible applications in different fields azobenzocrown ethers are
interesting object of the studies. Structure modifications lead to compounds which may
be used as ionophores in ion selective electrodes (ISE) and may also work as a
chromogenic reagents for metal cation determination in solution [cf. 1-3]. Previously we
have presented the synthesis and properties of hydroxybenzocrown ethers’ derivatives
with ether or ether-ester side chain. Ligands were used as ionophores in ISE.
16-Membered azobenzocrown ether and its derivatives are well known potassium
ionophores in ISE. Here we present the ionophoric properties of newly synthesized 16membered
bisazobenzocrown and azobenzocrown ethers with disulfide or thiol residue
among the others. Obtained compounds were used for miniature potassium sensors
construction i.e. screen printed graphite and silver electrodes (ionophores with S-H or
S-S function). The influence of membrane composition, additives (carbon nanotubes)
for the sensor response were studied.
Obtained compounds were also tested as a material for surface plasmon sensors based
on gold nanoparticles for potassium recognition in water.
1. E. Luboch, E. Wagner-Wysiecka, J. F. Biernat : J. Supramol. Chem., 2, 2002, 279.
2. E. Luboch., E. Wagner-Wysiecka, Z. Poleska-Muchlado, V.Ch. Kravtsov: Tetrahedron, 61, 2005,
10738
3. E. Luboch, E. Wagner-Wysiecka, T. Rzymowski Tetrahedron, 65, 2009,10671