title: Caged Phosphate and the Slips and Misses in Determination of Quantum Yields for Ultraviolet-A-Induced Photouncaging.
abstract: The quantum yields for photouncaging reactions are mostly determined relative to other uncaging reactions, often using 1-(2-nitrophenyl)ethyl-phosphate ("caged phosphate"). Herein, we demonstrate that the quantum yields acquired by using this method can be off by an order of magnitude at the typical irradiation wavelengths around 350 nm and describe an easy-to-use alternative procedure using inexpensive azobenzene.
authors.affiliation: Department of Chemistry, Winterthurerstrasse, 190, 8057, Zurich (Switzerland).
authors.forename: Philipp
authors.initials: P
authors.lastname: Anstaett
authors.affiliation: Department of Chemistry, Winterthurerstrasse, 190, 8057, Zurich (Switzerland).
authors.forename: Anna
authors.initials: A
authors.lastname: Leonidova
authors.affiliation: Department of Chemistry, Winterthurerstrasse, 190, 8057, Zurich (Switzerland). gilles.gasser@chem.uzh.ch.
authors.forename: Gilles
authors.initials: G
authors.lastname: Gasser
mesh_terms: D015394:Molecular Structure; D010710:Phosphates / Q000737:chemistry*; D011789:Quantum Theory; D014466:Ultraviolet Rays
chemical_list: D010710:Phosphates
keywords: azo compounds; caged compounds; photochemistry; photouncaging; quantum yield