title: A Class of Multiresponsive Colorimetric and Fluorescent pH Probes via Three Different Reaction Mechanisms of Salen Complexes: A Selective and Accurate pH Measurement.
abstract: We report a class of multiresponsive colorimetric and fluorescent pH probes based on three different reaction mechanisms including cation exchange, protonation, and hydrolysis reaction of K(I), Ca(II), Zn(II), Cu(II), Al(III), and Pd(II) Salen complexes. Compared with traditional pure organic pH probes, these complex-based pH probes exhibited a much better selectivity due to the shielding function of the filled-in metal ion in the complex. Their pH sensing performances were affected by the ligand structure and the central metal ion. This work is the first report of "off-on-on'-off" colorimetric and fluorescent pH probes that possess three different reaction mechanisms and should inspire the design of multiple-responsive probes for important analytes in biological systems.
authors: College of Chemistry, Sichuan University , Chengdu 610041, China.
authors: Jinghui
authors: J
authors: Cheng
authors: College of Chemistry, Sichuan University , Chengdu 610041, China.
authors: Fei
authors: F
authors: Gou
authors: College of Chemistry, Sichuan University , Chengdu 610041, China.
authors: Xiaohong
authors: X
authors: Zhang
authors: College of Chemistry, Sichuan University , Chengdu 610041, China.
authors: Guangyu
authors: G
authors: Shen
authors: College of Chemistry, Sichuan University , Chengdu 610041, China.
authors: Xiangge
authors: X
authors: Zhou
authors: College of Chemistry, Sichuan University , Chengdu 610041, China.
authors: Haifeng
authors: H
authors: Xiang
mesh_terms: D002412:Cations / Q000737:chemistry; D003124:Colorimetry / Q000379:methods*; D056831:Coordination Complexes / Q000737:chemistry*; D005029:Ethylenediamines / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D007474:Ion Exchange; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D011522:Protons; D013050:Spectrometry, Fluorescence / Q000379:methods; D014867:Water / Q000737:chemistry
chemical_list: D002412:Cations; D056831:Coordination Complexes; D005029:Ethylenediamines; D005456:Fluorescent Dyes; D008024:Ligands; D008670:Metals; D011522:Protons; D014867:Water; C011452:disalicylaldehyde ethylenediamine