Comparison in practical applications of crown ether sensor molecules containing an acridone or an acridine unit–a study on protonation and complex formation
Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2021•Springer
Crown ethers containing an acridone or an acridine unit are successfully applied opto-and
electrochemical cation sensors. The heteroaromatic unit of these macrocycles can be in
different forms during the applications, which have a strong influence on the sensing
behavior. Moreover, in the case of acridono-macrocycles a prototropic equilibrium takes
place upon complexation, which is effected by the physicochemical characteristics. A Pb2+-
selective acridono-18-crown-6 ether and its 9-phenylacridino-analogue were used as model …
electrochemical cation sensors. The heteroaromatic unit of these macrocycles can be in
different forms during the applications, which have a strong influence on the sensing
behavior. Moreover, in the case of acridono-macrocycles a prototropic equilibrium takes
place upon complexation, which is effected by the physicochemical characteristics. A Pb2+-
selective acridono-18-crown-6 ether and its 9-phenylacridino-analogue were used as model …
Abstract
Crown ethers containing an acridone or an acridine unit are successfully applied opto- and electrochemical cation sensors. The heteroaromatic unit of these macrocycles can be in different forms during the applications, which have a strong influence on the sensing behavior. Moreover, in the case of acridono-macrocycles a prototropic equilibrium takes place upon complexation, which is effected by the physicochemical characteristics. A Pb2+-selective acridono-18-crown-6 ether and its 9-phenylacridino-analogue were used as model compounds for comparing the different forms of the heterocyclic units of these sensor molecules. Since in most practical sensor applications of the fluorescent hosts a non-neutral aqueous medium is present, studies on complexation and signaling were carried out from the aspect of the relationship among protonation, coordinating ability, complex stability and tautomeric equilibrium. A strong interdependence among these factors was found and limitations of using unsubstituted acridino- and acridono-sensor molecules in comparison with their 9-substituted-acridino-analogues were discussed. This study will hopefully serve as a useful standpoint for future development of ionophore-based sensors containing an acridone or an acridine unit.
Springer
以上显示的是最相近的搜索结果。 查看全部搜索结果