Back to Search
Start Over
Synthesis, characterization and Cu(2+) triggered selective fluorescence quenching of Bis-calix[4]arene tetra-triazole macrocycle
Synthesis, characterization and Cu(2+) triggered selective fluorescence quenching of Bis-calix[4]arene tetra-triazole macrocycle
- Source :
- Journal of hazardous materials. 309
- Publication Year :
- 2015
-
Abstract
- A novel fluorescent bis-calix[4]arene macrocycle 9 incorporating metal-binding pockets was successfully prepared. The structure of macrocycle 9 and its precursors were characterized via EI-MS, MALDI-TOF-MS, ESI-MS, (1)H NMR, (13)CNMR, 2D NMR, and X-ray crystallography. The macrocycle 9 displayed selective fluorescence quenching after interacting with Cu(2+) in the presence competing metal cations including Mg(2+), Ca(2+), Ba(2+), Ag(+), Zn(2+), Ti(4+),Cd(2+), Hg(2+), Pb(2+), In(3+), La(3+), Cr(3+), Ni(2+), Sb(3+), V(5+), Fe(3+), Co(2+), Sn(2+), Sn(2+), and Tl(+). The Cu(2+) limit of detection was found to be 40 nM much lower than its threshold level (∼ 20 μM) in drinking water permitted by the U.S Environmental Protection Agency (EPA). Furthermore, drinking water samples from Karachi University (Pakistan) spiked with Cu(2+) were analysed with the sensing system and the results showed an excellent agreement with the fluorescence quenching phenomenon of macrocycle 9 examined in deionized water. Importantly, the chemosensor 9 could be used to detect Cu(2+) in living cells.
- Subjects :
- Detection limit
Environmental Engineering
010405 organic chemistry
Health, Toxicology and Mutagenesis
Supramolecular chemistry
Triazole
Carbon-13 NMR
010402 general chemistry
Photochemistry
01 natural sciences
Pollution
Fluorescence
0104 chemical sciences
Metal
chemistry.chemical_compound
chemistry
visual_art
Proton NMR
visual_art.visual_art_medium
Environmental Chemistry
Waste Management and Disposal
Two-dimensional nuclear magnetic resonance spectroscopy
Nuclear chemistry
Subjects
Details
- ISSN :
- 18733336
- Volume :
- 309
- Database :
- OpenAIRE
- Journal :
- Journal of hazardous materials
- Accession number :
- edsair.doi.dedup.....ec3296cc762d0b2f09da3a906240a351