Triphenylamine based reactive coloro/fluorimetric chemosensors: Structural isomerism and solvent dependent sensitivity and selectivity.
作者： Anu Kundu , Savarimuthu Philip Anthony
DOI: 10.1016/J.SAA.2017.08.037
关键词:
摘要: Triphenyl amine based chemosensors, (2-(((2-(9H-carbazol-9-yl)phenyl)imino)methyl)-5-(diphenylamino)phenol (ortho-CPDP) and 2-(((4-(9H-carbazol-9-yl)phenyl)imino)methyl)-5-(diphenylamino)phenol (para-CPDP), showed solvent isomerism dependent selective coloro/fluorometric sensing of multiple metal ions (Fe3+, Al3+ Zn2+) with distinguishable responses. In CH3CN, ortho para-CPDP selectively produced yellow color upon addition Fe3+ that was slowly disappeared. The in DMF decolourised by adding Fe3+. Both CH3CN nearly similar rate decolourization for Al3+. However, the different (10μM, 8min) (5×10-4M, 40min) ions. limit detection is 10μM 500μM. mechanistic studies revealed imine hydrolysis presence Lewis acidic reactivity lead to high selectivity Further, exhibited fluorescence turn-on Zn2+ (λmax=513nm) 6.0μM. Thus, reactive para-CPDP, colorimetric Zn2+.
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