Chalcones isothiocyanate anchored into mesoporous silicate: Synthesis, characterization and metal ions sensing response

Fayed, Tarek A.; Shaaban, M. H.; El‐Nahass, Marwa N.; Hassan, Fathy

doi:10.1016/j.micromeso.2014.07.031

Cited by 15 publications

(8 citation statements)

References 33 publications

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“…A comparison of the K a values of the complexes of 4e with Cu 2+ and Pb 2+ ions reveals that a more stable complex is formed with Pb 2+ ions. This can be explained on the basis of the higher ionic radius of Pb 2+ (0.98 Å) compared with that of Cu 2+ (0.57 Å) and suggests that the cavity size of this cleft‐shaped molecule is more suitable for larger cations …”

Section: Resultsmentioning

confidence: 99%

Organosilatranes with Acylthiourea Derivatives – Metal‐Ion Binding, Substituent‐Dependent Sensitivity, and Prospects for the Fabrication of Magnetic Hybrids

Singh

Rani

2016

Eur J Inorg Chem

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A variety of topologically interesting acylthioureatethered organosilatranes (AcTu-OS) were prepared, and their function as metal-ion binding sites was investigated. The prepared compounds have been characterized by elemental analysis; FTIR, UV/Vis and NMR ( 1 H and 13 C) spectroscopy; and mass spectrometry. The organosilicon complexes 4a-4e possess diverse coordination abilities for the surveyed metal ions (Cu 2+ , Cd 2+ , Hg 2+ and Pb 2+ ), as was appraised by the corresponding absorption shifts in the UV/Vis spectra. In addition, a facile preparatory route for the covalent grafting of the most efficient receptor 4e onto a silica-encrusted magnetic nanosupport was

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Section: Resultsmentioning

confidence: 99%

Organosilatranes with Acylthiourea Derivatives – Metal‐Ion Binding, Substituent‐Dependent Sensitivity, and Prospects for the Fabrication of Magnetic Hybrids

Singh

Rani

2016

Eur J Inorg Chem

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“…The investigated azo dye was synthesized as follows; in a conical flask, 0.01 mol of p ‐nitro aniline (1.38 g) in 5 ml H 2 O was completely dissolved in 5 ml of hydrochloric acid (35%). The amine was diazotized by adding 0.7 g of sodium nitrite in 5 ml H 2 O dropwise with cooling at 0–5 °C.…”

Section: Methodsmentioning

confidence: 99%

Development of nanomaterial chemosensors for toxic metal ions sensing

Fayed

El‐Nahass

El‐Daly

et al. 2019

Applied Organom Chemis

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Heavy metal ions are harmful to aquatic life and humans owing to their high toxicity and non-biodegradability, so their removal from wastewater is an important task. Therefore, this work focuses on designing suitable, simple and economical nanosensors to detect and remove these metal ions with high selectivity and sensitivity. Based on this idea, different types of mesoporous materials such as hexagonal SBA-15, cubic SBA-16 and spherical MCM-41, their chloro-functionalized derivatives, as well as 4-(4-nitro-phenylazo)naphthalen-1-ol (NPAN) azo dye have been synthesized, with the aim of designing some optical nanosensors for metal ions sensing applications. The mentioned azo dye has been anchored into the chloro-functionalized mesoporous materials. The designed nanosensors were characterized using scanning and transmission electron microscopy as well as Fourier transform infrared and UV-visible spectral analysis, nitrogen adsorption-desorption isotherms, low-angle X-ray diffraction and thermogravimetric analyses. Their optical sensing to various toxic metal ions such as Cd (II), Hg (II), Mn (II), Fe (II), Zn (II) and Pb (II) at different values of pH (1.1, 4.9, 7 and 12) was investigated. The optimization of experimental conditions, including the effect of pH and metal ion concentration, was examined. The experimental results showed that the solution pH had a major impact on metal ion detection. The optical nanosensors respond well to the tested metal ions, as reflected by the enhancement in both absorption and emission spectra upon adding different concentrations of the metal salts and were fully reversible on adding ethylene diamine tetra acetic acid or citric acid to the formed complexes. High values of the binding constants for the designed nanosensors were observed at pHs 7 and 12, confirming the strong chelation of different metals to the nanosensor at these pHs. Also, high binding constants and sensitivity were observed for NPAN-MCM-41 as a nanosensor to detect the different metal ions. From the obtained results, we succeeded in transforming the harmful azo dye into an environmentally friendly form via designing of the optical nanosensors used to detect toxic metal ions in wastewater with high sensitivity.

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“…From their chemical and structural perspectives, triazine-based COFs have tremendous potential for metal-free heterogeneous photocatalysis. This new class of porous materials has already been widely used for different applications like catalysis, − gas adsorption/storage, − semiconductive and photoconductive devices, , sensing of metal ions/molecules, − optoelectronics, , and pharmaceuticals . It is possible due to their chemical and thermal stability, π–π stacked structural design, and highly accessible BET surface area with light density.…”

Section: Introductionmentioning

confidence: 99%

Metal-Free Covalent Organic Framework for Facile Production of Solar Fuel via CO₂ Reduction

Das

Chowdhury

et al. 2022

Ind. Eng. Chem. Res.

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We describe the facile hydrothermal synthesis of a sponge-like 2D layered triazine based covalent organic framework (COF) structure. The substance comprises of 18.49 nm nanoparticles and well-organized mesopores across its 2D layers. This highly ordered π-conjugated metal-free COF structure possesses 1.86 eV band gap energy and performs as a potential photocatalyst to form formic acid as well as methanol via CO2 (1 atm) reduction under visible light irradiation. The effect of different parameters like solvent type, sacrificial electron donor, time, light intensity, etc. was studied for the production of formic acid as well as methanol. Sunlight irradiation also showed a promising production rate for formic acid and methanol. The synthesized COF material is available to reuse for manifold reaction cycles with its catalytic efficiency without affecting its structural and morphological features.

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Chalcones isothiocyanate anchored into mesoporous silicate: Synthesis, characterization and metal ions sensing response

Cited by 15 publications

References 33 publications

Organosilatranes with Acylthiourea Derivatives – Metal‐Ion Binding, Substituent‐Dependent Sensitivity, and Prospects for the Fabrication of Magnetic Hybrids

Organosilatranes with Acylthiourea Derivatives – Metal‐Ion Binding, Substituent‐Dependent Sensitivity, and Prospects for the Fabrication of Magnetic Hybrids

Development of nanomaterial chemosensors for toxic metal ions sensing

Metal-Free Covalent Organic Framework for Facile Production of Solar Fuel via CO₂ Reduction

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Chalcones isothiocyanate anchored into mesoporous silicate: Synthesis, characterization and metal ions sensing response

Cited by 15 publications

References 33 publications

Organosilatranes with Acylthiourea Derivatives – Metal‐Ion Binding, Substituent‐Dependent Sensitivity, and Prospects for the Fabrication of Magnetic Hybrids

Organosilatranes with Acylthiourea Derivatives – Metal‐Ion Binding, Substituent‐Dependent Sensitivity, and Prospects for the Fabrication of Magnetic Hybrids

Development of nanomaterial chemosensors for toxic metal ions sensing

Metal-Free Covalent Organic Framework for Facile Production of Solar Fuel via CO2 Reduction

Contact Info

Product

Resources

About

Metal-Free Covalent Organic Framework for Facile Production of Solar Fuel via CO₂ Reduction