A highly selective redox, chromogenic, and fluorescent chemosensor for Hg 2+ in aqueous solution based on ferrocene-glycine bioconjugates
| Autor: | Arunabha Thakur, Sundargopal Ghosh, Sinjinee Sardar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Absorption spectroscopy
Metallocenes Glycine Color Photochemistry Redox Chemistry Techniques Analytical Substrate Specificity Inorganic Chemistry chemistry.chemical_compound copper ferrocene ferrous ion glycine mercury water chemical analysis chemistry color electrochemistry enzyme specificity instrumentation limit of detection oxidation reduction reaction solution and solubility spectrofluorometry ultraviolet spectrophotometry Copper Electrochemistry Ferrous Compounds Limit of Detection Mercury Oxidation-Reduction Solutions Spectrometry Fluorescence Spectrophotometry Ultraviolet Water Physical and Theoretical Chemistry Detection limit Aqueous solution Chromogenic Fluorescence Ferrocene Naked eye |
| Zdroj: | IndraStra Global. |
| ISSN: | 2381-3652 |
| Popis: | The synthesis, electrochemical, optical, and metal-cation-sensing properties of ferrocene-glycine conjugates C 30H 38O 8N 8Fe (2) and C 20H 24O 4N 4Fe (3) have been documented. Both compounds 2 and 3 behave as very selective redox (?E 1/2 = 217 mV for 2 and ?E 1/2 = 160 mV for 3), chromogenic, and fluorescent chemosensors for Hg 2+ cations in an aqueous environment. The considerable changes in their absorption spectra are accompanied by the appearance of a new low-energy peak at 630 nm (2, ? = 1600 M -1 cm -1; 3, ? = 822 M -1 cm -1). This is also accompanied by a strong color change from yellow to purple, which allows a prospective for the "naked eye" detection of Hg 2+ cations. These chemosensors present immense brightness and fluorescence enhancement (chelation-enhanced fluorescence = 91 for 2 and 42 for 3) following Hg 2+ coordination within the limit of detection for Hg 2+ at 7.5 parts per billion. � 2011 American Chemical Society. |
| Databáze: | OpenAIRE |
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