In the supporting electrolyte of NaH_(2)PO_(4)-Na_(2)HPO_(4)(pH 7.18),a sensitive reduction peak of TPPS_(4) was found by linear sweep voltammetry(LSV),the peak potential(E_(p)) was(-0.70 V)(vs SCE).

• 在底液NaH2PO4-Na2HPO4缓冲液(pH 7.；18)中；TPPS4在-0