Porous silica and polymer monolith architectures as solid-state optical chemosensors for Hg2+ ions

Madhesan, Thirumalai; Mohan, Akhila Maheswari

doi:10.1007/s00216-020-02870-8

Cited by 17 publications

(5 citation statements)

References 35 publications

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“…The limit of detection of probe for Hg 2+ is 0.11 µM, and applied to quantify Hg 2+ in real water samples. Thirumalai et al [116] reported two solid templates, mesoporous silica monoliths (MSMs) and mesoporous polymer monoliths (MPMs), immobilized with the amphiphilic chromo-ionophoric 91 (Figure 30) to develop solid-state sensors for naked-eye colorimetric sensing of Hg 2+ . Upon interaction with Hg 2+ , the solid-state sensors showed color transition from light orange to deep red due to the metal to ligand charge transfer (MLCT).…”

Section: Colorimetric Sensorsmentioning

confidence: 99%

Mercury Toxicity and Detection Using Chromo-Fluorogenic Chemosensors

2021

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Mercury (Hg), this non-essential heavy metal released from both industrial and natural sources entered into living bodies, and cause grievous detrimental effects to the human health and ecosystem. The monitoring of Hg2+ excessive accumulation can be beneficial to fight against the risk associated with mercury toxicity to living systems. Therefore, there is an emergent need of novel and facile analytical approaches for the monitoring of mercury levels in various environmental, industrial, and biological samples. The chromo-fluorogenic chemosensors possess the attractive analytical parameters of low-cost, enhanced detection ability with high sensitivity, simplicity, rapid on-site monitoring ability, etc. This review was narrated to summarize the mercuric ion selective chromo-fluorogenic chemosensors reported in the year 2020. The design of sensors, mechanisms, fluorophores used, analytical performance, etc. are summarized and discussed.

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Section: Colorimetric Sensorsmentioning

confidence: 99%

Mercury Toxicity and Detection Using Chromo-Fluorogenic Chemosensors

2021

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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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“…Recently, porous polymer-based adsorbents have been reported with better durability and flexibility in their structural features that promote their utility in ion-sensing applications. 18 , 19 However, polymer materials have a low surface area and distribution of functional groups, thereby reducing their removal capacity for target pollutants.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the use of porous solid adsorbents of polymer and silica templates for solid-state colorimetric ion sensing has been increasing. − Awual et al developed a conjugate nanomaterial-based colorimetric Hg(II) ion sensor using chromoionophoric receptors immobilized on a silica substrate . Silica-based mesopore monoliths have suitable adsorbent properties but attaining the desired porous structural properties is challenging.…”

Section: Introductionmentioning

confidence: 99%

“…Metal–organic framework (MOF)-based adsorbents with chromophores have been reported as optical chemosensors for heavy metal removal and detection. , However, despite their high surface features, the effective recovery of MOF-based nanomaterials has been debated due to nanotoxicity issues related to environmental applications. , The weaknesses associated with the current adsorbents necessitate new materials for the effective and efficient removal of Hg(II) from aqueous solutions. Recently, porous polymer-based adsorbents have been reported with better durability and flexibility in their structural features that promote their utility in ion-sensing applications. , However, polymer materials have a low surface area and distribution of functional groups, thereby reducing their removal capacity for target pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Chromophoric Ion Receptor-Decorated Porous Monolithic Polymer for the Solid-State Naked Eye Sensing of Hg(II): An Experimental and Theoretical Approach

Kuppusamy

Deivasigamani

2022

ACS Omega

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The current work presents a perspective to obliterate toxic Hg(II) from an aqueous environment, a strategic environmental remediation and decontamination measure. We report a simple, efficient, and reusable solid-state visual sensing strategy for the selective detection and quantitative recovery of ultratrace Hg(II). The capture of Hg(II) ions was effectuated using a macro-/ mesoporous polymer monolith uniformly decorated with an azobased chromophoric ion receptor, i.e., 7-((1H-benzo[d]imidazol-2yl)diazenyl)quinolin-8-ol (BIDQ). The porous polymer template was synthesized through free radical polymerization of gylcidylmethacrylate and ethylene glycol dimethacrylate, leading to distinct structural and surface properties that offer exclusive solid-state colorimetric selectivity for Hg(II) upon restricted spatial dispersion of the ion receptor. The sensor provides a broad linear response range of 1−200 μg/L, with an outstanding detection limit of 0.2 μg/L for Hg(II) ions, thus effectuating reliable and reproducible sensing. Optimizing analytical parameters such as solution pH, receptor concentration, sensor quantity, kinetics, temperature, and matrix interference proved to be promising for the real-time monitoring of toxic mercury ions from aqueous/industrial systems, with maximum response in the pH range of 7.5−8.0, with a response time of ≤80 s. Density functional theory (DFT) calculations were employed to study the electronic structure of BIDQ upon chelating with Hg(II) ions, using 6-311G and LAND2Z basis sets.

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Porous silica and polymer monolith architectures as solid-state optical chemosensors for Hg2+ ions

Cited by 17 publications

References 35 publications

Mercury Toxicity and Detection Using Chromo-Fluorogenic Chemosensors

Mercury Toxicity and Detection Using Chromo-Fluorogenic Chemosensors

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

Chromophoric Ion Receptor-Decorated Porous Monolithic Polymer for the Solid-State Naked Eye Sensing of Hg(II): An Experimental and Theoretical Approach

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