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Title of Journal: J Incl Phenom Macrocycl Chem

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Abbravation: Journal of Inclusion Phenomena and Macrocyclic Chemistry

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Kluwer Academic Publishers

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ISSN

1573-1111

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8Hydroxyquinoline Based Multipodal Systems Effec

Authors: Prabhpreet Singh Subodh Kumar
Publish Date: 2006/08/12
Volume: 58, Issue: 1-2, Pages: 89-94
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Abstract

The complexation behaviors of tetrapod 1245tetrakis8hydroxyquinolinoxymethyl benzene 1 and dipod 12bis8hydroxyquinolinoxymethylbenzene 2 have been determined by fluorescence spectroscopy in CH3CN–H2O 41 buffered at pH 69 HEPES 10 mM and by 1H NMR in CD3CNCDCl3 11 mixture Tetrapod 1 can recognize Ag+10–40 μM even in the presence of 500 μM of alkali and alkaline earth metal ions However transition metal ions interfere in the estimation of Ag+ Dipod 2 shows poor selectivity towards Ag+ The 1H NMR based titrations of podands 1 and 2 against AgNO3 show characterstic changes in chemical shifts in quinoline methylene and aromatic protons The spectral fitting of fluorescence and 1H NMR titration data has been used to evaluate the stoichiometries of complexes and their complexation constants

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