RETRACTED: Pyrene-Phosphonate Conjugate: Aggregation-Induced Enhanced Emission, and Selective Fe<sup>3+</sup> Ions Sensing Properties
A new pyrene-phosphonate colorimetric receptor <b>1</b> has been designed and synthesized in a one-step process via amide bond formation between pyrene butyric acid chloride and phosphonate-appended aniline. The pyrene-phosphonate receptor <b>1</b> showed aggregation-induced...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2017-08-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/22/9/1417 |
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| Summary: | A new pyrene-phosphonate colorimetric receptor <b>1</b> has been designed and synthesized in a one-step process via amide bond formation between pyrene butyric acid chloride and phosphonate-appended aniline. The pyrene-phosphonate receptor <b>1</b> showed aggregation-induced enhanced emission (AIEE) properties in water/acetonitrile (ACN) solutions. Dynamic light scattering (DLS) characterization revealed that the aggregates of receptor <b>1</b> at 80% water fraction have an average size of ≈142 nm. Field emission scanning electron microscopy (FE-SEM) analysis confirmed the formation of spherical aggregates upon solvent evaporation. The sensing properties of receptor <b>1</b> were investigated by UV-vis, fluorescence emission spectroscopy, and other optical methods. Among the tested metal ions, receptor <b>1</b> is capable of recognizing the Fe<sup>3+</sup> ion selectively. The changes in spectral measurements were explained on the basis of complex formation. The composition of receptor <b>1</b> and Fe<sup>3+</sup> ions was determined by using Job’s plot and found to be 1:1. The receptor <b>1</b>–Fe<sup>3<b>+</b></sup> complex showed a reversible UV-vis response in the presence of EDTA. |
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| ISSN: | 1420-3049 |