2 research outputs found
Highly Reactive Diazenyl Radical Species Evidenced during Aryldiazonium Electroreduction
We
report the experimental reassessment of the widely admitted
concerted reduction mechanism for diazonium electroreduction. Ultrafast
cyclic voltammetry was exploited to demonstrate the existence of a
stepwise pathway, and real-time spectroelectrochemistry experiments
allowed visualization of the spectral signature of an evolution product
of the phenyldiazenyl radical intermediate. Unambiguous identification
of the diazenyl species was achieved by radical trapping followed
by X-ray structure resolution. The electrochemical generation of this
transient under intermediate energetic conditions calls into question
our comprehension of the layer structuration when surface modification
is achieved via the diazonium electrografting technique as this azo-containing
intermediate could be responsible for the systematic presence of azo
bridges in nanometric films
Highly Reactive Diazenyl Radical Species Evidenced during Aryldiazonium Electroreduction
We
report the experimental reassessment of the widely admitted
concerted reduction mechanism for diazonium electroreduction. Ultrafast
cyclic voltammetry was exploited to demonstrate the existence of a
stepwise pathway, and real-time spectroelectrochemistry experiments
allowed visualization of the spectral signature of an evolution product
of the phenyldiazenyl radical intermediate. Unambiguous identification
of the diazenyl species was achieved by radical trapping followed
by X-ray structure resolution. The electrochemical generation of this
transient under intermediate energetic conditions calls into question
our comprehension of the layer structuration when surface modification
is achieved via the diazonium electrografting technique as this azo-containing
intermediate could be responsible for the systematic presence of azo
bridges in nanometric films