Record number :
1001044
Title of article :
Langmuir–Blodgett and Langmuir–Schaefer films of homoleptic and heteroleptic phthalocyanine complexes as voltammetric sensors: Applications to the study of antioxidants
Author/Authors :
Serena Casilli، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
9
From page :
304
To page :
312
Abstract :
Double- and triple-decker phthalocyanine derivatives have been successfully used as the sensitive materials for liquid electrochemical sensors. The materials include homoleptic and heteroleptic phthalocyanine complexes formed by phthalocyanine, porphyrin and naphthalocyanine rings. A high degree of cross-selectiviy towards antioxidant compounds (including vannilic acid, pyrogallol, ascorbic acid and catechin) has been attained by using different phthalocyanine complexes. The features observed in the cyclic voltammograms reflect the rich electrochemistry of either the phthalocyanine molecules or the studied solutions. In consequence, each sensor shows a selective response to the antioxidant analysed. The obtained voltammograms from by using highly ordered electrodes prepared using the Langmuir–Blodgett (LB) or the Langmuir–Schaefer (LS) techniques show better resolution and stability than those of disordered electrodes prepared by casting. For this reason, ordered films have been chosen to construct an array of liquid sensors. The principal component analysis (PCA) of the obtained signals has allowed that a clear discrimination of the antioxidant solutions be achieved. The rich and varied responses produced by antioxidant molecules evidences that voltammetric electrodes based on phthalocyanines, are especially suitable for the analysis of compounds with electrochemical activity
Keywords :
Phthalocyanine , Bisphthalocyanine , Naphthalocyanine , Double-decker phthalocyanine , Triple-decker phthalocyanine , Voltammetricsensor , Electronic tongue
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
2005
Link To Document :
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