Exploring selective recognition between Fe2+, Fe3+ and their implementation in bio-imaging: A combined spectroscopic and theoretical investigation

Mati, Soumya Sundar; Singharoy, Dipti; Samai, Boby; Konar, Saugata; Santra, Niranjan; Pal, Shaipayan; Das, Palash P.; Murmu, Shyamal

doi:10.1016/j.molstruc.2019.02.020

Cited by 16 publications

(8 citation statements)

References 29 publications

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“…49 Moreover, the association constant was computed to be 1.30 × 10 4 M −1 based on the Benesi–Hildebrand method. 50 Meanwhile, we further detected the intensity of PDPE-TO every 15 min for 120 min, as shown in Fig. 6d.…”

Section: Resultsmentioning

confidence: 94%

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe²⁺ ions

et al. 2022

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Section: Resultsmentioning

confidence: 94%

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe²⁺ ions

et al. 2022

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“…The linear range for Cu 2+ detection is ∼0 to 11 μM with the LOD of 0.61 μM at S/N=3 (Figure c) . Moreover, the association constant was computed to be 9.96×10 4 M −1 by the Benesi‐Hildebrand analysis of the titration profiles (1 : 1 binding model) which also confirmed by Nuclear magnetic titration and mass spectrometry (Figure ).…”

Section: Resultsmentioning

confidence: 99%

A Dual‐Functional “On‐Off‐On” Relay Fluorescent Probe for the Highly Sensitive Detection of Copper(II) and Phosphate Ions

et al. 2020

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A high-efficiency dual-functional on-off-on fluorescence probe: 2'-4'-dihydroxydiphenyl-8-formyl-7-hydroxycoumarin hydrazine (L) based on photoelectron transfer mechanism (PET) was designed and synthesized, and its ion recognition characteristics were fully studied by spectroscopy. As expected, probe L shows highly sensitive to Cu 2 + in EtOH-HEPES (20 mM v/v, 80 : 20, pH = 7.40) solution, and its detection limit up to 6.14 × 10 À 7 M. The stoichiometric ratio of LÀ Cu 2 + complex was determined as 1 : 1 based on 1 H NMR titration and ESI-MS. Meanwhile, the resulted LÀ Cu 2 + complex shows good selectivity for the phosphoric acid family anion (H 2 PO 4 À , HPO 4 2À and PO 4 3À ), which denote probe L the dual-function in rapid detection of Cu 2 + and phosphate family's ions. Scheme 1. Synthesis of probe L. (a) NH 2 -NH 2 , MeOH, room temperature, 24 h. (b) Hexamethylenetetramine, HOAc, 90°C, 8 h. (c) MeOH, room temperature, 10 h.

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“…Some reported fluorophores having pyrimidine, oxadiazole, dansyl-styryl quinoline, arene, spirocyclic, dicyanomethylene and 8-hydroxyquinoline moiety in the detection of Fe 2 + ion in buffer medium are using fluorescence technique. [12][13][14][15][16][17][18] The LOD value of the reported fluorophores is lesser than the fluorophore with À CH=NÀ moiety. [10] Especially, À CH=NÀ containing bidentate fluorophores exhibit very good fluorescence response and high capability to interact with metal ions in the chemosensor study.…”

Section: Introductionmentioning

confidence: 85%

“…The molecular orbital diagram of the dimer of oligoesters is depicted in SI. 16. The band gap value of the quencher is obtained as 4.2653 eV (E HOMO = À 6.6814 eV and E LUMO = À 2.4161 eV) and the image is shown in SI.17.…”

Section: Frontier Molecular Orbital Analysismentioning

confidence: 99%

“…Therefore, developing sensitive chemosensors for the selective detection of iron is crucial. Some reported fluorophores having pyrimidine, oxadiazole, dansyl‐styryl quinoline, arene, spirocyclic, dicyanomethylene and 8‐hydroxyquinoline moiety in the detection of Fe 2+ ion in buffer medium are using fluorescence technique [12–18] . The LOD value of the reported fluorophores is lesser than the fluorophore with −CH=N− moiety [10] .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection

et al. 2023

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Azine‐based monomer and its three oligoesters were synthesized, characterized with IR, UV, GC‐MS, GPC, 1H NMR, 13C{1H} NMR, 31P NMR and applied to chemosensor applications. In the chemosensor study, fluorophores show selective and sensitive responses with Fe2+ ions in the DMF/H2O solution (1 : 1, pH: 7.4, fluorophore: 5 μM). The quenching of fluorescence intensity with the addition of Fe2+ ion gives the correlation coefficient (R2) value above 0.99286, exhibiting good binding stoichiometry nature of fluorophores with Fe2+ than the oligoesters. The high detecting capability of oligoesters is further ascertained by its higher LOD than the monomer (5.05×10−7). The binding constant values of fluorophores obtained from the Benesi‐Hildebrand plot show that the oligoesters have a higher binding ability (1.0012–1.0025 M−1) with Fe2+ ion than the monomer (1.0011 M−1). The conductivity nature of the oligoester gradually increased with the contact time of iodine. After 96hr of iodine doping, EMDAP exhibits higher conductivity (1.98×10−3 Scm−1) than the other oligoesters due to higher electron‐density nitrogen atoms in the structure. The EMDOP shows high dielectric constant value because of its π‐π interaction, loosely attached π electrons and high dipole moment values. All these experimental results are validated with the theoretical (DFT) approach by optimizing the structure of the fluorophore with B3LYP/6‐311++G(d,p) level basis set. The DFT approach also explains the mechanism of fluorescence quenching and the exact binding sites of fluorophores with Fe2+ ions.

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Exploring selective recognition between Fe2+, Fe3+ and their implementation in bio-imaging: A combined spectroscopic and theoretical investigation

Cited by 16 publications

References 29 publications

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe²⁺ ions

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe²⁺ ions

A Dual‐Functional “On‐Off‐On” Relay Fluorescent Probe for the Highly Sensitive Detection of Copper(II) and Phosphate Ions

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection

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Exploring selective recognition between Fe2+, Fe3+ and their implementation in bio-imaging: A combined spectroscopic and theoretical investigation

Cited by 16 publications

References 29 publications

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe2+ ions

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe2+ ions

A Dual‐Functional “On‐Off‐On” Relay Fluorescent Probe for the Highly Sensitive Detection of Copper(II) and Phosphate Ions

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe2+ ion detection

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Product

Resources

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Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe²⁺ ions

Aggregation-induced emission (AIE) from poly(1,4-dihydropyridine)s synthesized by Hantzsch polymerization and their specific detection of Fe²⁺ ions

Synthesis and structural characterization of azine based oligoesteric chemosensors for Fe²⁺ ion detection