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TD-DFT Guided Advanced E-Eye Sensing Technique for On-site Quantification of Fe, Cr, F, and As in the Environmental, Biological, and Food Samples

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A selective colorimetric chemosensor for Fe³.

Min-Hsiu Kao¹, Chin-Feng Wan², An-Tai Wu¹

¹Department of Chemistry, National Changhua University of Education, Changhua, Taiwan.

Luminescence : the Journal of Biological and Chemical Luminescence

|June 28, 2017

Summary

This summary is machine-generated.

Two novel colorimetric receptors, PS and PP, were synthesized for selective iron(III) ion detection. These receptors exhibit a distinct color change upon binding Fe³⁺, demonstrating their potential in sensing applications.

Keywords:

colorimetric pyridine thiophene

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A Colorimetric Method for Measuring Iron Content in Plants

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Published on: September 7, 2018

Area of Science:

Analytical Chemistry
Materials Science
Supramolecular Chemistry

Background:

Development of selective and sensitive chemosensors is crucial for detecting metal ions.
Colorimetric receptors offer a visual and straightforward method for ion detection.

Purpose of the Study:

To synthesize and characterize two new colorimetric receptors, PS and PP.
To investigate the cation sensing capabilities of PS and PP, focusing on iron(III) ions.

Main Methods:

Synthesis of thiophene and pyridine appended derivatives (PS and PP).
Spectrophotometric analysis to observe colorimetric changes upon ion binding.
Determination of association constants using Hill plots in methanol solution.

Main Results:

Receptors PS and PP showed a selective color change from colorless to orange in the presence of Fe³⁺.
High association constants were determined: 1.15 × 10⁶ M⁻¹ for PS-Fe³⁺ and 4.31 × 10⁶ M⁻¹ for PP-Fe³⁺.
Detection limits were found to be 490.7 ppm for PS and 393.7 ppm for PP.

Conclusions:

PS and PP are effective colorimetric sensors for Fe³⁺ ions in methanol.
The receptors demonstrate good binding affinity and selectivity for iron(III).
These findings highlight the potential of PS and PP in developing visual sensing systems for iron.