Tunable phenothiazine hydrazones as colour displaying, ratiometric and reversible pH sensors

被引：23

作者：

Bishnoi, Swati ^{[1
]}

Milton, Marilyn Daisy ^{[1
]}

机构：

[1] Univ Delhi, Dept Chem, Delhi 110007, India

来源：

TETRAHEDRON LETTERS | 2015年 / 56卷 / 47期

关键词：

pH sensor; Phenothiazine hydrazone; Naked-eye detection; Intramolecular Charge Transfer (ICT); d-Photoinduced Electron Transfer (d-PET); BENZIMIDAZOLIUM SALTS; ANTIFUNGAL ACTIVITY; FLUORESCENT; CHEMOSENSOR; DERIVATIVES; ICT;

D O I：

10.1016/j.tetlet.2015.10.041

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Design, synthesis and characterization of pH responsive, ratiometric and colorimetric phenothiazine hydrazone sensors have been described. Structural modifications in probes 1-3 lead to fine tuning of colour, absorption and pH in both acidic and basic pH ranges. Probe 1 acts as a pH sensor in 11-14 pH range with a tetracolour change from yellow to orange to red to magenta-purple whereas 3 acts as a pH sensor in 2-9 pH range accompanied by a colour change from pale-yellow to yellow. Probe 3 also displays fluorescence quenching through d-PET mechanism. NMR studies were performed to get an insight into the interaction of the probes (1-3) with H+/OH-. UV absorption, fluorescence emission and colour switching of the synthesized molecules were found to be reversible upon a change in the pH. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：6633 / 6638

页数：6

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