Thin and ultra-thin layer dual electrode electrochemistry: Theory of steady-state voltammetry without supporting electrolyte

2013 ◽  
Vol 34 ◽  
pp. 192-195 ◽  
Author(s):  
Wojciech Hyk ◽  
Zbigniew Stojek
Keyword(s):  
Steady State ◽  
Thin Layer ◽  
Supporting Electrolyte

Steady-state voltammetry of strong and weak acids with and without supporting electrolyte

1992 ◽  
Vol 64 (20) ◽  
pp. 2372-2377 ◽  
Author(s):  
Malgorzata. Ciszkowska ◽  
Zbigniew. Stojek ◽  
Susan E. Morris ◽  
Janet G. Osteryoung
Keyword(s):  
Steady State ◽  
Supporting Electrolyte ◽  
Weak Acids

Electrochemistry of mono- and bis-porphyrins containing a β,β′-fused tetraazaanthracene group

2012 ◽  
Vol 16 (05n06) ◽  
pp. 674-684 ◽  
Author(s):  
Zhongping Ou ◽  
Weihua Zhu ◽  
Paul J. Sintic ◽  
Yuanyuan Fang ◽  
Maxwell J. Crossley ◽  
...  
Keyword(s):  
Thin Layer ◽  
Strong Interaction ◽  
Metal Ion ◽  
Supporting Electrolyte ◽  
Redox Potentials ◽  
Visible Spectra ◽  
Uv Visible ◽  
Porphyrin Macrocycles ◽  
Specific Metal ◽  
Spectroelectrochemical Properties

Electrochemical and thin-layer spectroelectrochemical properties of mono- and bis-porphyrins containing a β,β′-fused tetraazaanthracene (TA) group were examined in CH2Cl2 , PhCN and pyridine containing 0.1 M tetra-n-butylammonium perchlorate as supporting electrolyte. The investigated mono-porphyrins are represented as (PTA)M, where M = 2H, Cu(II) or Zn(II) and PTA = the dianion of 5,10,15,20-tetrakis-(3,5-di-tert-butylphenyl)-6′,7′-dimethyl-1′,4′,5′,8′-tetraazaanthraceno-[2′,3′b]-porphyrin, while the bis-porphyrins are represented by M(P)-TA-(P)M, where M is H2 , Cu(II) , Zn(II) , Ni(II) or Pd(II) and P is the dianion of 5,10,15,20-tetrakis-(3,5-di-tert-butylphenyl)porphyrin. The effect of the fused TA group on the redox potentials and UV-visible spectra of the neutral, electroreduced and electrooxidized porphyrins is discussed and the data compared to what is observed for related mono- and bis-quinoxalinoporphyrins of the type (PQ)M and (QPQ)M, where Q is a β,β′-fused quinoxaline group. Each TA-linked bis-porphyrin exhibits a strong interaction between the two equivalent porphyrin macrocycles, the magnitude of which is dependent upon the specific metal ion.

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