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mygalaxy1977

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The cyclic voltammogram  of 4-nitrobenzene-diazonium tetrafluoroborate on a Courtauld XAU fiber electrode (Fig. 1a) in aprotic medium (acetonitrile-ACN-+0.1 M NBu4BF4) presents an monoelectronic irreversible wave at a very positive potential (Ep=-0.01 V/SCE), followed by a second wave.
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(1) ÎÄÖÐ˵ÊÇ¡°an monoelectronic irreversible wave¡±, ÔõôÄÜ¿´³öÊǵ¥µç×Ó·´Ó¦£¿Ôõô¿´³öÊDz»¿ÉÄæµÄ·´Ó¦£¿
(2) a second waveÔÚʲôλÖã¬Ã»¿´³öÀ´¡£

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(3) ¶ÔÓÚͼb, ˵Ã÷ÎÄ×ÖÊÇ"The shape of this voltammogram is clearly indicative of a process where the species involved do not diffuse to and from the electrode". ÈçºÎ¿´³öspecies²»À©É¢µ½µç¼«£¬Ò²²»´Óµç¼«À©É¢¡£
(4) ¶ÔÓÚͼc, ˵Ã÷ÎÄ×ÖÊÇ"a nearly six electron voltammetric wave is then observed, on the backward scan a small anodic wave appears which corresponds to the reoxidation of the 4-hydroxylamino phenyl groups formed as intermediates of the reduction", ÈçºÎÄÜ¿´³öÊÇÁùµç×Ó·´Ó¦£¿

[ Last edited by mygalaxy1977 on 2012-3-13 at 22:14 ]
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mygalaxy1977

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