Photoelectric active hybrid film based on RuII terpyridyl complex and EuIII substituted Keggin polyoxometalate of [Eu(BW11O39)2]15

The hybrid film consisting of alternating layers of EuIII substituted Keggin polyoxometalate anion [Eu(BW11O39)2]15− (EuBW) and RuII complex cation of [Ru(L)2]2+ {L=4′-(4-(imidazol-1-yl)phenyl)-2,2′:6′,2″-terpyridine}, abbreviated as RuL1, was prepared on quartz and indium-tin oxide (ITO)-coated gla...

Full description

Saved in:
Bibliographic Details
Published in:Electrochimica acta 2017-12, Vol.256, p.291-298
Main Authors: Ye, Huai-Yao, Qi, Jian-Min, Sun, Rui, Gao, Li-Hua, Wang, Ke-Zhi
Format: Article
Language:English
Subjects:
Anions
Calomel electrode
Electrochemical impedance spectroscopy
Electrodes
Glass substrates
Indium tin oxides
Lanthanides
Light irradiation
Luminous intensity
Photocurrent generation
Photoelectric effect
Photoelectric emission
Photoelectricity
Polyoxometalates
Ruthenium (II) complex
Self-assembled film
Self-assembly
Studies
Substitutes
Thin films
Ultraviolet radiation
Voltammetry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The hybrid film consisting of alternating layers of EuIII substituted Keggin polyoxometalate anion [Eu(BW11O39)2]15− (EuBW) and RuII complex cation of [Ru(L)2]2+ {L=4′-(4-(imidazol-1-yl)phenyl)-2,2′:6′,2″-terpyridine}, abbreviated as RuL1, was prepared on quartz and indium-tin oxide (ITO)-coated glass substrates by electrostatically self-assembled method, and studied by UV–vis absorption spectroscopy, cyclic voltammetry, permeability of the film to the redox probe [Fe(CN)6]3−, electrochemical impedance spectroscopy and photoelectrochemical measurements. The uniform depositions of the two components into the films were evidenced by uniform growths of the UV–vis absorption peaks. The ITO electrodes modified with the hybrid film showed stable electrochemical property in relation to EuBW anion and RuL1. The significant cathodic photocurrent generation was observed upon visible light irradiation with a maximum photocurrent density of 8.47μA/cm2 being achieved for a 5-layer film of (EuBW/RuL1)5 at an applied potential of −0.3V versus saturated calomel electrode. The effects of substitution atoms in MBW (M=EuIII vs. ZnII) and experimental conditions including applied bias potentials, layer numbers of the films and irradiated light intensities on photocurrent generation were discussed.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.10.028