caa a22 4500 469059699 CHVBK 20180323132853.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF01133230 doi (NATIONALLICENCE)springer-10.1007/BF01133230 Complex forming and extraction properties of oligo benzo-fused crown ethers [Elektronische Daten] [Olaf Heitzsch, Karsten Gloe, Alfréd Sabela, Jiří Koryta, Edwin Weber] The complex forming properties with alkali metal and ammonium ions of a series of oligo benzo-condensed 18-crown-6 ethers1-8 having a different gradation of lipophilicity and of molecular rigidity are investigated by voltammetry at the interface of two immiscible electrolyte solutions (ITIES) and by a liquid-liquid extraction technique. The experimental results obtained in the two phase system H2O/nitrobenzene are discussed in relation to the structure of the crown and the cation type. The stability constants for the 1 : 1 complexes of Na+, K+, Rb+, Cs+ and NH 4 + in nitrobenzene have been determined and compared with the extraction constants for the 1: 1 complexes of Na+ and K+ and for the 1 : 1 and 1 : 2 complexes of Cs+, showing the effect of oligo benzo condensation for the 18-crown-6 system. Kluwer Academic Publishers, 1992 Crown ethers nationallicence liquid-liquid extraction nationallicence voltammetry nationallicence stability constants nationallicence Heitzsch Olaf Institut für Festkörper- und Werkstoffforschung Dresden, 0-8027, Dresden, Germany aut Gloe Karsten Institut für Festkörper- und Werkstoffforschung Dresden, 0-8027, Dresden, Germany aut Sabela Alfréd J. Heyrovsky Institute of Physical Chemistry and Electrochemistry, CS-18223, Praha 8, Czechoslovakia aut Koryta Jiří Institute of Physiology, CS-14220, Praha 4, Czechoslovakia aut Weber Edwin Institut für Organische Chemie und Biochemie der Universität Bonn, W-5300, Bonn, Germany aut Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 13/4(1992-08-01), 311-319 0923-0750 13:4<311 1992 13 10847 https://doi.org/10.1007/BF01133230 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01133230 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Heitzsch Olaf Institut für Festkörper- und Werkstoffforschung Dresden, 0-8027, Dresden, Germany aut NATIONALLICENCE 700 1- Gloe Karsten Institut für Festkörper- und Werkstoffforschung Dresden, 0-8027, Dresden, Germany aut NATIONALLICENCE 700 1- Sabela Alfréd J. Heyrovsky Institute of Physical Chemistry and Electrochemistry, CS-18223, Praha 8, Czechoslovakia aut NATIONALLICENCE 700 1- Koryta Jiří Institute of Physiology, CS-14220, Praha 4, Czechoslovakia aut NATIONALLICENCE 700 1- Weber Edwin Institut für Organische Chemie und Biochemie der Universität Bonn, W-5300, Bonn, Germany aut NATIONALLICENCE 773 0- Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 13/4(1992-08-01), 311-319 0923-0750 13:4<311 1992 13 10847 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer