Fabrication of a GUMBOS-based acid–base indicator: smart probe for sensing acids and bases in any solvent
| Autor: | Sudhir Kumar Das, Rajkumar Sahoo, Prabal Pramanik, Mintu Halder |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Aqueous solution
General Physics and Astronomy Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chemical reaction Combinatorial chemistry 0104 chemical sciences Nanomaterials Solvent chemistry.chemical_compound chemistry Ionic liquid Methyl orange Phosphonium Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Physical Chemistry Chemical Physics. 22:28045-28054 |
| ISSN: | 1463-9084 1463-9076 |
| DOI: | 10.1039/d0cp03157g |
| Popis: | This report outlines the synthesis of an ionic liquid-based pH-responsive indicator to sense acids or bases in non-polar as well as polar solvents. Herein, we have assembled a new ionic liquid (IL) comprised of a group of uniform materials based on organic salts (GUMBOS) by attaching a quaternary phosphonium ionic liquid with a very common acid-base indicator, methyl orange, via simple ion-exchange reaction. This integrated IL-based indicator is highly soluble in less polar solvents and exhibits good sensitivity toward the presence of acids/bases in those media. Furthermore, this indicator has been exploited in determining the dissociation constants of several acids in non-aqueous aprotic solvents by overlapping indicator method and hence this report provides essential information toward the understanding of many fundamental chemical reactions. This report has further scope for the synthesis of novel aqueous suspended nanomaterials, i.e., the nanoparticles derived from GUMBOS (nanoGUMBOS) by a simple flash nano-precipitation method. The nanomaterial has been well characterized by different spectroscopic and microscopic studies. The obtained nanoparticles also exhibit substantial pH-responsive behaviors in aqueous medium and show better susceptibility as compared to the free organic indicator. Thus, this report explores detailed studies on the IL-based indicator in sensing the acidity/basicity of various media. |
| Databáze: | OpenAIRE |
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