Imperial College London

Professor Matthew J. Fuchter

Faculty of Natural SciencesDepartment of Chemistry

Professor of Chemistry



+44 (0)20 7594 5815m.fuchter




401CMolecular Sciences Research HubWhite City Campus






BibTex format

author = {Gibson, R and Calbo, J and Fuchter, MJ},
doi = {10.1002/cptc.201900065},
journal = {ChemPhotoChem},
title = {Chemical ZE isomer switching of arylazopyrazoles using acid},
url = {},
year = {2019}

RIS format (EndNote, RefMan)

AB - Arylazopyrazoles show significant potential as nextgeneration photoswitches, in particular because of the high thermal stability of their Zisomers. Herein we investigate the potential to perform Z−Eisomer chemical switching of arylazopyrazoles using acid. We show that acidaccelerated isomerisation allows for robust Z−E switching using mild acids and opens up the possibility to use lightacid cycles to near quantitatively and reversibly switch the arylazopyrazoles at room temperature. We attribute the chemical switching to azonium formation, facilitated by mesomeric stabilisation by the pyrazole ring. Coupled with their exceptionally long Zisomer halflives, we believe our study may open up a wider array of functional opportunities for the arylazopyrazoles.
AU - Gibson,R
AU - Calbo,J
AU - Fuchter,MJ
DO - 10.1002/cptc.201900065
PY - 2019///
SN - 2367-0932
TI - Chemical ZE isomer switching of arylazopyrazoles using acid
T2 - ChemPhotoChem
UR -
UR -
ER -