title: Phosphorescent pH sensors and switches with substitutionally tunable response range based on photo-induced electron transfer.
abstract: According to the principle of photo-induced electron transfer (PET), five aminomethyl-bromonaphthalene phosphoroionophores with long lifetimes (to ms) were synthesized, all of them working well in beta-cyclodextrin (beta-CD) aqueous solutions. They form a family of phosphorescent sensors with pH-dependent spectral properties. For all the compounds, the fully protonated form exhibits the highest phosphorescence emission intensity and the proton-free form of the sensor is weakly emissive, due to the designed PET process. The sensors also show the expected pH dependence of phosphorescence quantum yields. Responses of the sensors are tuned by variation of substituent. The pH response ranges for 1-5 were 4.3-6.5, 3.5-10.5, 3.4-10.5, 3.4-10.5 and 3.4-6.1, respectively.
authors.affiliation: School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, People's Republic of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Zhang
authors.forename: Li-Xuan
authors.initials: LX
authors.lastname: Mu
authors.forename: Hong-Sheng
authors.initials: HS
authors.lastname: Mao
authors.forename: Yu-Feng
authors.initials: YF
authors.lastname: Wang
authors.forename: Wei-Jun
authors.initials: WJ
authors.lastname: Jin
mesh_terms: D002412:Cations / Q000494:pharmacology; D003505:Cyclodextrins / Q000494:pharmacology; D004579:Electron Transport / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D008163:Luminescent Measurements / Q000379:methods*; D015394:Molecular Structure; D010777:Photochemistry; D013050:Spectrometry, Fluorescence; D013997:Time Factors
chemical_list: D002412:Cations; D003505:Cyclodextrins