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Electrochemical Deposition and Spectroelectrochemical Response of Bromophenol Blue Films on Gold
Author(s) -
Saydjari A.,
Pietron J. J.,
Simpkins B. S.
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201500136
Subject(s) - bromophenol blue , quartz crystal microbalance , electrochemistry , deposition (geology) , materials science , substrate (aquarium) , electrode , analytical chemistry (journal) , absorption (acoustics) , cyclic voltammetry , chemistry , adsorption , organic chemistry , chromatography , paleontology , oceanography , sediment , biology , geology , composite material
Abstract Bromophenol blue (BPB) was electropolymerized onto a Au substrate. The effects of voltammetric cycle number, BPB concentration, and pH on film thickness, density, optical absorption, and electrochemical susceptibility were evaluated, and favorable deposition conditions were identified. Quantitative measurement of the film mass via quartz crystal microbalance enabled determination of the molar volume and revealed a strong dependence of film density with deposition pH. Finally, electrochemical control of the optical properties of BPB films was demonstrated via in situ spectroelectrochemistry. We believe this is the first demonstration of electropolymerization of pure BPB on Au, and thus the first demonstration of poly(BPB) as an electrochemically switchable optical coating.