分别测定四-(三氟乙烷氧基)酞菁锌(ZnPcF)于非水溶剂N,N-二甲基甲酰胺(DMF)、二甲基亚砜(DMSO)及磷酸盐缓冲溶液(PBS)中玻碳(GC,抛光)电极的循环伏安行为.结果表明,ZnPcF在DMF及DMSO溶剂均呈现4对电流峰,半波电位分别为0.558、-0.761、-1.034和-1.417 V,显示该物存在4个准可逆酞菁配体的单电子转移过程.而在PBS溶液中,ZnPcF乳化液仅呈现两个电流峰,半波电位为-0.885和-1.104 V,为不可逆反应特征,与酞菁锌(ZnPc未取代)相比,由于其周边取代基—三氟乙烷氧基的吸电子作用,导致氧化还原电位正移.
吴晓珊
,
黄丽英
,
张锦雀
,
朱善岚
. 四-(三氟乙烷氧基)酞菁锌在非水与水溶剂中的电化学性能[J]. 电化学, 2010
, 16(4)
: 460
-464
.
DOI: 10.61558/2993-074X.2072
The cyclic voltammetric performance of ZnPcF in N,N-dimethylformaide(DMF),dimethyl sulfoxide(DMSO) solution and phosphate buffer solutions(PBS) has been examined.The results showed that four pairs of redox peaks appeared in nonaqueous solvents,and the values of half-wave redox potential were 0.558 V,-0.761 V,-1.034 V,-1.417 V,respectively,exhibiting four quasi-reversible phthalocyanine ligand based one-electron transfers.In PBS only two redox peaks were observed and the values of half-wave redox potential were-0.885 V,-1.104 V,exhibiting irreversible behavior characteristics.Comparing to the zinc phthalocyanine(unsubstitute ZnPc),introducing electron-withdrawing groups-trifluoroethoxyl to the peripheral sites of the phthalocyanines shifts the redox processes of the complex toward positive potentials.
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