A water-soluble, cationic bis-porphyrin exhibiting a more sensitive fluorescent response to Cu2+ relative to its monomeric counterpart
| Autor: | De-Ming Kong, Ran Zhang, Li-Na Zhu, Li-Na Zhang, Ke-Ke Liu, Xiao-Zeng Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Detection limit
Quenching 010405 organic chemistry Chemistry Metals and Alloys Analytical chemistry Cationic polymerization 010402 general chemistry Condensed Matter Physics Photochemistry 01 natural sciences Porphyrin Fluorescence 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion chemistry.chemical_compound Paramagnetism Monomer Materials Chemistry Electrical and Electronic Engineering Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 247:179-187 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2017.03.016 |
| Popis: | A water-soluble, cationic bis-porphyrin (Bis-TMPipEOPP) was synthesized, characterized, and its optical properties were investigated. Its fluorescence was found to be specifically quenched by paramagnetic Cu2+ ions via a static quenching mechanism. Based on these findings, an organic solvent-free sensing platform was developed for the “turn-off” detection of Cu2+. Such a platform could achieve sensitive Cu2+ quantitation at a detection limit of 8.8 nM. Compared to its monomeric counterpart TMPipEOPP, Bis-TMPipEOPP exhibited a higher tendency to self-aggregate due to the synergy between the two porphine rings. This characteristics conferred the proposed Bis-TMPipEOPP-based Cu2+-sensing platform with a sensitive fluorescent response to low concentrations of Cu2+ in a linear detection range of between 10 nM and 300 nM. However, the TMPipEOPP-based method provided observable changes in the fluorescent signal only at Cu2+ concentrations >200 nM. These results potentially offer a method for improving the performance of fluorescent-dye-based Cu2+ sensors. |
| Databáze: | OpenAIRE |
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