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Abstract
Materials containing new chromoionophores consisting of crown residue and azole moiety as parts
of macrocycles were encapsulated by the sol-gel procedure in silica xerogel matrices and proposed as
chemical recognition elements especially for such metal ions as Li+, Cs+ and Cu2+. Action of these recognition elements is in principle based on changes of reflectance. The recognition elements containing 21-membered chromogenic derivatives of unsubstituted imidazole and 4-methylimidazole are able to distinguish in aqueous solution whether the Li+ concentration ratio is lower or higher than 1. In the case of Cu2+complexes with 18-membered macrocyclic chromoionophore in which phenol residue was replaced by imidazole and 21-membered chromogenic derivative of 4-methylimidazole, values of the EPR parameters g and A suggest participation of two oxygen and two nitrogen atoms of the ligand in the equatorial plane of the tetragonally distorted octahedral environment of the central ion.
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Details
- Category:
- Magazine publication
- Type:
- Magazine publication
- Published in:
-
MATERIALS SCIENCE-POLAND
no. 25,
pages 1044 - 1051,
ISSN: 0137-1339 - Publication year:
- 2007
- Verified by:
- No verification
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