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Absorption Spectroelectrochemistry on Mixed Perylenediimide‐Based Self‐Assembled Monolayers: Non‐Linear Dependence of Absorbance versus Surface Coverage
Author(s) -
Bkhach Sihame,
Alévêque Olivier,
Morille Yohann,
Breton Tony,
Hudhomme Piétrick,
Gautier Christelle,
Levillain Eric
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600770
Subject(s) - absorbance , monolayer , cyclic voltammetry , chromophore , absorption (acoustics) , materials science , linearity , tilt (camera) , voltammetry , self assembled monolayer , dilution , absorption spectroscopy , photochemistry , analytical chemistry (journal) , chemistry , electrochemistry , optics , nanotechnology , electrode , organic chemistry , chromatography , thermodynamics , mechanical engineering , physics , composite material , quantum mechanics , engineering
Abstract The study of mixed self‐assembled monolayers of perylenediimide and hexanethiol by cyclic voltammetry and absorption spectroelectrochemistry shows a non‐linearity of absorbance maxima as a function of the surface coverage. This surprising result could be supported by an increase in the average tilt angle at low coverage, suggesting that the dilution of redox species through an alkanethiol would induce a change of the orientation of immobilized chromophores and, therefore, a modification of the optical properties of the monolayer.