@article{article, title = {{A colourimetric calix[4]pyrrole-4-nitrophenolate based anion sensor}}, url = {{}}, year = {{1999}}, month = {{9}}, author = {{Gale PA and Twyman LJ and Handlin CI and Sessler JL}}, journal = {{CHEM COMMUN}}, issue = {{18}}, pages = {{1851-1852}}, note = {{Accessed on 2025/05/24}}}