Preparation of hybrid films containing polyoxometalate and fluorescein and their electrochemically induced fluorescence switching behaviors

摘要

In this study, three hybrid films {[(PEI/P5W3o)_m/(PEI/PSS/PEI/GO@F)]_n(PEI/P5W3o)_m] (m = 1, 3, 5; n = 15,17, 18) (P5W_(30): [PsW_(30)O_(110)]~(15-); GO: graphene oxide; F: fluorescein) with green fluorescence have been successfully fabricated through a suitable structural design and alternate assembly of selected components. The fluorescence of the hybrid films can be reversibly switched by the electrochromism of the P5W30 component upon electrochemical modulation while the hybrid films display structural stability against the electrochemical process.