N-Arylated bisferrocene pyrazole for the dual-mode detection of hydrogen peroxide: an AIE-active fluorescent 'turn ON/OFF' and electrochemical non-enzymatic sensor
Autor: | Thamodharan Viswanathan, Ezhumalai David, Nallasamy Palanisami, Selvam Prabu |
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Rok vydání: | 2019 |
Předmět: |
Detection limit
Solvatochromism 02 engineering and technology General Chemistry Pyrazole 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Photochemistry 01 natural sciences Fluorescence Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Linear range Materials Chemistry 0210 nano-technology Hydrogen peroxide Amination |
Zdroj: | New Journal of Chemistry. 43:8539-8550 |
ISSN: | 1369-9261 1144-0546 |
DOI: | 10.1039/c9nj01471c |
Popis: | A series of new N-arylated bisferrocene pyrazole (D–π–A–π–D) chromophores have been synthesized by the Chan–Lam cross-coupling (1, 2) and Buchwald–Hartwig amination (3, 4) reactions. The compounds 1–4 were characterized using analytical and spectroscopic methods. Compounds 1 and 3 showed positive solvatochromism and later, compounds 2 and 4 exhibited negative solvatochromism. The compounds 1–4 interestingly exhibited highly enhanced fluorescence intensity in their aggregate states, while in the solution states, they exhibited low fluorescence intensity. The origin of enhanced emission in the aggregated state was due to the restriction of intramolecular rotation, especially in the mixture having a ratio of 40 : 60 (CH3CN/H2O). The aggregation-induced emission (AIE) properties were utilized to detect H2O2, which showed a quick response in a linear range of 10–50 μM with detection limits of 38.8 nM (1) and 15.9 nM (3). Furthermore, the electrochemical reduction of hydrogen peroxide in the same linear range as above showed limits of detection (3σ) of 14.4 mM (1) and 11.6 mM (3). |
Databáze: | OpenAIRE |
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