Department of Physics
Permanent URI for this collectionhttp://localhost:4000/handle/123456789/1932
Browse
2 results
Search Results
Item Fluorescence Quenching of a Benzimidazolium–based Probe for Selective Detection of Picric Acid in Aqueous Medium(Wiley, 2016-06) Pant, Debi D.; Sakhuja, RajeevA novel fluorescent coumaryl linked benzimidazolium salt has found to be highly selective for nanomolar detection of explosive picric acid, over other aromatic explosives in aqueous medium. The quenching constant and detection limit of the sensor was found to be KSV=1.58 × 104 M−1 and 208 nM respectively for picric acid. UV-Visible studies, time resolved fluorescence results and Density Functional Theory (DFT) calculations inferred the ground-state charge-transfer complex formation as the predominant quenching mechanism for picric acid detection.Item Highly sensitive fluorescent imidazolium-based sensors for nanomolar detection of explosive picric acid in aqueous medium(Elsevier, 2016-06) Pant, Debi D.; Sakhuja, RajeevTwo novel fluorescent coumaryl linked imidazolium salts have been synthesized, characterized and found to be highly selective for nanomolar detection of commonly used explosive picric acid, over other aromatic explosives in aqueous medium. The compounds are highly photostable and are practically applicable for sensing picric acid in real environmental samples, in presence of interfering aromatic/non-aromatic explosives and metal ions. In solution, the high sensitivity of the sensors toward picric acid can be predominantly attributed to the ground-state charge-transfer complex formation based on UV–vis studies, time resolved fluorescence results and DFT calculations.