Acid-base sensors based on novel quinone-type dyes.
We present a detailed study on the acid-base behaviour of a family of "potentially antiaromatic" p-benzoquinonediimine ligands. These 12pi electron molecules can be considered as constituted of two chemically connected but electronically not conjugated 6pi-electron subunits. Upon successive protonation, "mono" and "double" cyanine-type chromophores are generated in solution and allow a precise and sensitive spectrophotometric detection. These molecules represent a new class of tunable quinones whose electronic and structural properties can be triggered by proton input, as established by a complete physico-chemical study involving a combination of potentiometric and spectrophotometric methods (absorption and emission).
Elhabiri
Mourad
M
Laboratoire de Physico-Chimie Bioinorganique, UMR 7509 CNRS, ECPM, Université Louis Pasteur, 25 rue Becquerel, 67200 Strasbourg, France.
Siri
Olivier
O
Sornosa-Tent
Alejandra
A
Albrecht-Gary
Anne-Marie
AM
Braunstein
Pierre
P