Mesoporous silica monolith based colorimetric probes for Co2+ ions

Thirumalai, Murugan; Mohan, Akhila Maheswari

doi:10.1016/j.matlet.2021.130142

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…Active sites provided by organic groups make PMOs have a wide range of applications, such as catalysis, − adsorption, − drug delivery, , sensing, , and so on. Especially, PMO materials have been used as fluorescence sensors to detect many metal ions, such as Cu 2+ , Co 2+ , Zn 2+ , etc . Our group synthesized PMOs based on rhodamine-6G Schiff derivative-bridged organosilanes (RS-Si), a bis(rhodamine Schiff-base derivative) bridged precursor with four silyl groups (BRH-Si 4 ), and a (tetraylnitrilomethylidyne-hexaphenyl (TH))-derived tetrasiloxane precursor (TH-Si 4 ), respectively. − These PMOs show excellent fluorescence properties and good optical stability and can be used to specifically detect Cu 2+ .…”

Section: Introductionmentioning

confidence: 99%

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

Han

2022

ACS Omega

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A novel type of organic–inorganic hybrid periodic mesoporous materials based on 1,8-dihydroxyanthraquinone (DHAQ-PMOs) was synthesized in a ternary deep eutectic solvent (DES). In the process of the material synthesis, an organosiloxane precursor (DHAQ-Si) and tetraethylorthosilicate (TEOS) were used as the mixed Si source, and cetyltrimethylammonium bromide (CTAB) was used as the structure directing agent. The DES formed by choline chloride (ChCl), urea (U), and ethylene glycol (EG) was used as a green solvent. The water needed for the hydrolysis of DHAQ-Si and TEOS was provided from free water in the sodium hydroxide solution. As characterized by small-angle X-ray scattering, nitrogen adsorption/desorption isotherms, and high-resolution transmission electron microscopy, the obtained mesoporous materials exhibit a two-dimensional hexagonal ( P 6 mm ) structure. DHAQ possesses double fluorescence emission peaks at ca. 520 and 580 nm due to the effect of the excited-state intramolecular proton transfer (ESIPT). For DHAQ-PMOs, the silica framework can provide a rigid environment that makes the fluorescence properties more stable and the fluorescence emission peak appears to red-shift obviously. The DHAQ-PMOs have high selectivity and sensitivity in a wide pH range that can be used to detect Cu 2+ , and the limit of detection (LOD) is as low as 2.39 × 10 –9 M. Fluorescence polarization experiments, high-resolution mass spectrometry, and Fourier transform infrared spectroscopy were used to study the coordination interaction between DHAQ and Cu 2+ . The density functional theory (DFT) was used to further prove the coordination ability and interaction between DHAQ and Cu 2+ . XPS spectra were also done to prove the coordination of DHAQ and DHAQ-PMO-10 with Cu 2+ . In addition, confocal fluorescence microscope images exhibit that DHAQ-PMOs can detect Cu 2+ in living cells. The results show that DHAQ-PMOs have great application potential as a sensor for the detection of Cu 2+ .

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Section: Introductionmentioning

confidence: 99%

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

Han

2022

ACS Omega

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“…In this study, the surface of the mesoporous silica nanospheres (MSNs) was utilized and it showed promising results for detecting petroleum products and removing Ni(II) ions from electroplating wastewater. The high surface area and interconnected platform of mesoporous networks in the silica nanospheres allow for the effective incorporation of the organic chromophore molecules onto the nanosphere base, resulting in an efficient solid‐state ocular chemosensor (CPAMHP sensor) for Ni(II) detection and removal 37‐58 . To achieve high‐performance ion‐sensing effectiveness for ultra‐trace concentrations of Ni(II) ions recognition in the oil samples and to maximize the adsorption capacity and removal of nickel ions from the electroplating wastewater samples, experimental parameters including solution pH, target ion concentration, sensor amount, and foreign ions interference were optimized.…”

Section: Introductionmentioning

confidence: 99%

Chromoionophoric probe‐anchored mesoporous silica nanospheres for rapid and reliable naked‐eye detection of Ni(II) ions in petroleum products and removal from electroplating wastewater

Al‐bonayan

Alamrani

Ibarhiam

et al. 2023

J of Molecular Recognition

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This paper presents the expansion of an optical, chemical sensor that can rapidly and reliably detect, quantify, and remove Ni(II) ions in oil products and electroplating wastewater sources. The sensor is based on mesoporous silica nanospheres (MSNs) that have an extraordinary surface area, uniform surface morphology, and capacious porosity, making them an excellent substrate for the anchoring of the chromoionophoic probe,3′‐{(1E,1′ E)‐[(4‐chloro‐1,2 phenylene)bis (azaneylylidene)]‐bis(methaneylylidene)}bis(2‐hydroxybenzoic acid) (CPAMHP). The CPAMHP probe is highly selective and sensitive to Ni(II), enabling it to be used in naked‐eye colorimetric recognition of Ni(II) ions. The MSNs provide several accessible exhibited sites for uniform anchoring of CPAMHP probe molecules, making it a viable chemical sensor even with the use of naked‐eye sensing. The surface characters and structural analysis of the MSNs and CPAMHP sensor samples were examined using various techniques. The CPAMHP probe‐anchored MSNs exhibit a clear and vivid color shift from pale yellow to green upon exposure to various concentrations of Ni(II) ions, with a reaction time down to approximately 1 minute. Furthermore, the MSNs can serve as a base to retrieve extremely trace amounts of Ni(II) ions, making the CPAMHP sensor a dual‐functional device. The calculated limit of recognition for Ni(II) ions using the fabricated CPAMHP sensor samples is 0.318 ppb (5.43 × 10−9 M). The results suggest that the proposed sensor is a promising tool for the sensitive and reliable detection of Ni(II) ions in petroleum products and for removing Ni(II) ions in electroplating wastewater; the data indicate an excellent removal of Ni (II) up to 96.8%, highlighting the high accuracy and precision of our CPAMHP sensor.

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Organic-Inorganic Nanohybrid-Based Sensors for Metal Ions Sensing

Batool¹,

Junaid²

2022

Materials Horizons: From Nature to Nanomaterials

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Mesoporous silica monolith based colorimetric probes for Co2+ ions

Cited by 6 publications

References 10 publications

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

Chromoionophoric probe‐anchored mesoporous silica nanospheres for rapid and reliable naked‐eye detection of Ni(II) ions in petroleum products and removal from electroplating wastewater

Organic-Inorganic Nanohybrid-Based Sensors for Metal Ions Sensing

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Mesoporous silica monolith based colorimetric probes for Co2+ ions

Cited by 6 publications

References 10 publications

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu2+

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu2+

Chromoionophoric probe‐anchored mesoporous silica nanospheres for rapid and reliable naked‐eye detection of Ni(II) ions in petroleum products and removal from electroplating wastewater

Organic-Inorganic Nanohybrid-Based Sensors for Metal Ions Sensing

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A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺

A Chemosensor of 1,8-Dihydroxyanthraquinone PMOs Prepared in a Ternary Deep Eutectic Solvent for the Sensitive Detection of Cu²⁺