Absorption Spectroelectrochemistry on Mixed Perylenediimide‐Based Self‐Assembled Monolayers: Non‐Linear Dependence of Absorbance versus Surface Coverage. Issue 3 (20th January 2017)

• Record Type: Journal Article
• Authors: Bkhach, Sihame; Alévêque, Olivier; Morille, Yohann; Breton, Tony; Hudhomme, Piétrick; Gautier, Christelle; Levillain, Eric
• Is Part Of: ChemElectroChem. Volume 4:Issue 3(2017)
• Page Start: 601
• Page End: 606
• Publication Date: 2017-01-20
• Subjects: Absorbance -- perylenediimide -- self-assembled monolayers -- surface coverage -- time-resolved spectroelectrochemistry; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201600770
• Languages: English
• ISSNs: 2196-0216

Abstract

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. Abstract : Mixed SAMs : The study of mixed self‐assembled monolayers of perylenediimide and hexanethiol by cyclic voltammetry and absorption spectroelectrochemistry leads to a non‐linearity of absorbance maxima as a function of the surface coverage. This surprising result could be supported by a change of the orientation of immobilized chromophores at low coverage, inducing a modification of the optical properties of the monolayer.