title: Visual sensing of Ca2+ ion via photoreaction of fluorenyl ester-armed cyclen.
abstract: Fluorenyl ester-armed cyclen gave fluorenone and related decomposition compounds upon photoirradiation. The reaction was effectively suppressed by the formation of an octacoordinated Ca2+ complex while Na+ and other alkali/alkaline earth metal cations had little influence. Since the production efficiency of fluorescent fluorenone related well to the concentration of the Ca2+ ion, the photoreaction of this armed cyclen offered the naked-eye detection of Ca2+ ion in aqueous samples.
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan.
authors.forename: Tomoko N
authors.initials: TN
authors.lastname: Player
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shinoda
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tsukube
mesh_terms: D002118:Calcium / Q000032:analysis*; D000080027:Cyclams; D004952:Esters; D005449:Fluorenes / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D010777:Photochemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000080027:Cyclams; D004952:Esters; D005449:Fluorenes; D006571:Heterocyclic Compounds; C041509:fluorene; C038072:cyclen; D002118:Calcium