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

Madhesan, Thirumalai ; Mohan, Akhila Maheswari

Analytical and bioanalytical chemistry, 2020-10, Vol.412 (26), p.7357-7370 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Porous silica and polymer monolith architectures as solid-state optical chemosensors for Hg2+ ions
Autor: Madhesan, Thirumalai ; Mohan, Akhila Maheswari
Assuntos: Analytical Chemistry ; Anchoring ; Biochemistry ; Characterization and Evaluation of Materials ; Chelation ; Chemical sensors ; Chemistry ; Chemistry and Materials Science ; Chemoreceptors ; Fabrication ; Food Science ; Ions ; Laboratory Medicine ; Mercury (metal) ; Monitoring/Environmental Analysis ; Polymers ; Quinoline ; Research Paper ; Selectivity ; Silica ; Silicon dioxide ; Solid state ; Structural hierarchy ; Water analysis ; Water sampling ; X ray photoelectron spectroscopy
É parte de: Analytical and bioanalytical chemistry, 2020-10, Vol.412 (26), p.7357-7370
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
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Descrição: We demonstrate a simple strategy to concoct a competent solid-state opto-chemosensor for the selective and sensitive visual detection of Hg 2+ ions. The sensor fabrication involves the utilization of indigenously prepared mesoporous silica and polymer monoliths as probe anchoring templates and 8-hydroxy-7-(4- n -butylphenylazo) quinoline (HBPQ) as the chromo-ionophoric probe for Hg 2+ sensing. Both the monoliths are designed with discrete structural and morphological features to serve as efficient host templates. The structural and surface features of the monoliths are characterized using p-XRD, TEM, SEM, SAED, EDAX, XPS, and N 2 isotherm analysis. The synergetic features of monolith structural hierarchy along with the probe’s selective chelating ability enable rapid signal response and remarkable ion selectivity for Hg 2+ . The solid-state sensors evince a linear signal response from 0.6 to 150 μg/L for Hg 2+ recognition, with superior data authenticity and replication that is preceded by an RSD value of ≤ 2.25% when tested with real water samples. Graphical abstract Mesoporous silica and polymer monolith architects hosting HBPQ probe molecules demonstrate an excellent visual sensing of ultra-trace (μg/L) Hg 2+ in various water samples with a striking color transition from light orange to dark red upon complexation of probe with Hg 2+ . The solid-state sensors are Hg 2+ ion selective, super-responsive, real-time applicable, and also reusable.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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

Madhesan, Thirumalai ; Mohan, Akhila Maheswari

Berlin/Heidelberg: Springer Berlin Heidelberg

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