title: Reversible photodynamic chloride-selective sensor based on photochromic spiropyran.
abstract: We report here for the first time on a reversible photodynamic bulk optode sensor based on the photoswitching of a spiropyran derivative (Sp). The photoswitching of Sp induces a large basicity increase in the polymeric phase, which triggers the extraction of Cl(-) and H(+). Cl(-) is stabilized by a lipophilic chloride-selective ionophore inside the membrane, while H(+) binds with the open form of Sp and induces a spectral change, hence providing the sensor signal. The system was studied with spectroscopic and electrochemical methods.
authors.affiliation: Department of Inorganic and Analytical Chemistry, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva 4, Switzerland.
authors.forename: Xiaojiang
authors.initials: X
authors.lastname: Xie
authors.forename: Günter
authors.initials: G
authors.lastname: Mistlberger
authors.forename: Eric
authors.initials: E
authors.lastname: Bakker
mesh_terms: D001578:Benzopyrans / Q000737:chemistry*; D002712:Chlorides / Q000032:analysis* / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D009574:Nitro Compounds / Q000737:chemistry*; D055668:Photochemical Processes
chemical_list: D001578:Benzopyrans; D002712:Chlorides; D007211:Indoles; D009574:Nitro Compounds; C088184:spiropyran