Naphthyl-functionalized ninhydrin-derived receptor for ‘CHEF’-based sequential sensing of Al(III) and PPi: Prospective chemosensing applications under physiological conditions

Gil

2022

J Chinese Chemical Soc

A rhodanine-based fluorescent chemosensor DHM, 3-[(E)-{[4-(diethylamino)-2-hydroxyphenyl]methylidene}amino]-2-sulfanylidene-1,3-thiazolidin-4-one, has been designed and synthesized. Sensor DHM showed unique optical properties with large fluorescence change on detecting Zn 2+ . Most cations did not disturb the binding of DHM with Zn 2+ , while Co 2+ and Cu 2+ displayed fluorescence quenching and Fe 2+ , Fe 3+ , and Ni 2+ did some interference. With outcomes of Job plot and electrospray ionization (ESI)-mass data, the binding ratio of DHM to Zn 2+ was determined as a 1:1. Moreover, DHM could detect Zn 2+ with a low detection limit (1.33 μM). DHM could efficiently analyze Zn 2+ in a real environment with positive recovery and relative standard deviation (RSD) and be recyclable reliably with ethylenediaminetetraacetic acid (EDTA). DHM-doped test kits can be readily used for recognizing Zn 2+ . The binding feature of DHM to Zn 2+ was illustrated by ESI-mass, nuclear magnetic resonance (NMR) titration, and calculations.

Section: Calculationsmentioning

confidence: 95%

Selective fluorescent detection of Zn²⁺ by a rhodanine‐based chemosensor

Gil

2022

J Chinese Chemical Soc

“…Accordingly, the fluorescence turn-on of DHTC-Ga 3+ could be explained by the rigidity of the structure, indicating the chelation-enhanced fluorescence (CHEF) effect. [54,55] Based on 1 H NMR titration, ESI-MS, theoretical calculations, and Job's plot, we proposed the plausible binding mode of DHTC-Ga 3+ (Scheme 2).…”

Section: Theoretical Calculationmentioning

confidence: 99%

A new sensitive and selective detection of Ga³⁺ by thiophene‐based ‘turn‐on’ fluorescent chemosensor

2022

We designed a thiophene-based fluorescent chemosensor DHTCdetecting gallium (Ga 3+ ). DHTC could probe Ga 3+ using fluorescence enhancement.The limit of detection for Ga 3+ by DHTC was 0.39 μM. The binding mode of DHTC to Ga 3+ was determined as a 1:1 ratio from analysis by Job's plot and electrospray ionization-mass spectrometry (ESI-MS). In addition, DHTC could selectively detect Ga 3+ using test kits. The sensing process of Ga 3+ by DHTC was presented using ultraviolet-visible light titration, Job's plot, ESI-MS, 1 H nuclear magnetic resonance titration, and density functional theory calculation.

Section: Introductionmentioning

confidence: 99%

“…Therefore, our focus was to synthesize a simple, water-soluble, interference-free Schiff base probe that could sense both metal ions and anions in a physiological medium as a continuation of our research probes for the detection of different analytes. 41,42 Herein, we have designed and synthesized a simple chromone derivative-based multi-selective chemical probe L (Scheme 1), which was utilized for the selective ''turn-on'' detection of Al 3+ in an aqueous medium at physiological pH. The probe-Al 3+ ensemble could be employed as a fluorescence ''turn off'' sensor for PP i among all other common anions under the same experimental condition.…”

Section: Introductionmentioning

confidence: 99%

A chromone-based multi-selective sensor: applications in paper strips and real sample

Das

2022

New J. Chem.

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