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    STUDIA CHEMIA - Issue no. 2 / 2004  
         
  Article:   GRAPHITE ELECTRODE MODIFIED BY CHARGE TRANSFER COMPLEX BETWEEN TETRACYANOQUINODIMETHANE AND 16H,18H-DIBENZO[C,1]-7,9-DITHIA-16,18-DIAZAPENTACENE USED FOR NADH ELECTRO-OXIDATION.

Authors:  DELIA M. GLIGOR, MARIUS SOCOL, IONEL CĂTĂLIN POPESCU, CASTELIA CRISTEA, IOAN ALEXANDRU SILBERG.
 
       
         
  Abstract:  The electrochemical behavior of a new charge transfer complex between 7,7,8,8-tetracyanoquinodimethane and 16H,18H-dibenzo[c,1]-7,9-dithia-16,18-diaza-pentacene adsorbed on spectrographic graphite has been investigated. Cyclic voltammetry measurements, performed in aqueous buffer solutions at different potential scan rates and pH values, pointed out to a quasi-reversible, surface confined redox process. The voltammetric response involves the transfer of 1e-/1H+, with a heterogeneous rate constant of 26.8 s-1 (pH 7.0). The modified electrodes showed a good electrochemical stability as well as moderate electrocatalytic activity toward NADH electrooxidation.  
         
     
         
         
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