A Rotaxane Scaffold Bearing Multiple Redox Centers: Synthesis, Surface Modification and Electrochemical Properties

Abstract : A rotaxane scaffold incorporating two dithiolane anchoring units for the modification of gold surfaces has been functionalized with multiple copies of a redox unit, namely ferrocene. Surface modification has been first assessed at the single molecule level by atomic force microscopy (AFM) and scanning tunneling microscopy (STM) imaging, while tip enhanced Raman spectroscopy (TERS) provided the local vibrational signature of the ferrocenyl subunits of the rotaxanes grafted onto the gold surface. Finally, oxidation of the redox moieties within a rotaxane scaffold grafted onto gold microelectrodes has been investigated by ultrafast cyclic voltammetry. Intramolecular electron hopping is indeed extremely fast in this system. Moreover, the kinetics of charge injection depends on the molecular coverage due to the influence of intermolecular contacts on molecular motions.
Complete list of metadatas

https://hal.sorbonne-universite.fr/hal-01722802
Contributor : Véronique Martin <>
Submitted on : Monday, March 5, 2018 - 10:07:15 AM
Last modification on : Thursday, October 31, 2019 - 2:08:04 PM

Identifiers

Citation

Marie Steffenhagen, Alina Latus, Thi Minh Nguyet Trinh, Iwona Nierengarten, Ivan Lucas, et al.. A Rotaxane Scaffold Bearing Multiple Redox Centers: Synthesis, Surface Modification and Electrochemical Properties. Chemistry - A European Journal, Wiley-VCH Verlag, 2018, 24 (7), pp.1701-1708. ⟨10.1002/chem.201705245⟩. ⟨hal-01722802⟩

Share

Metrics

Record views

235