Breznová H, Volf R, Král V, Sessler JL, Try AC, Shishkanova TV. Monomer and polymer quinoxaline derivatives for cationic recognition.
Anal Bioanal Chem 2003;
375:1193-8. [PMID:
12733038 DOI:
10.1007/s00216-003-1816-2]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2002] [Revised: 01/07/2003] [Accepted: 01/17/2003] [Indexed: 11/26/2022]
Abstract
Monomeric and polymeric 5-nitroquinoxaline derivatives disubstituted in the 2 and 3 positions with 2-pyrrolyl (A), 2-furyl (B) and 2-thienyl (C) groups were prepared and characterized. The substituted 5-nitroquinoxalines were used as active components in poly(vinyl chloride)-membrane and electropolymerized electrodes that were then tested as possible sensors for various cationic species. In contrast to the difurylnitroquinoxaline-based systems, the monomeric and polymeric dipyrrolyl- and dithienylquinoxaline electrodes displayed a good selectivity for Ag(+) ions, providing a near-Nernstian response in the 10(-5) to 10(-2) mol L(-1) concentration range. The similar potentiometric behavior displayed by the monomeric and polymeric forms of systems A and C supports the contention that the main binding modes displayed by the monomeric forms are retained in the corresponding polymeric structures.
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