Synthesis of functionalized mesoporous silica nanoparticles for colorimetric and fluorescence sensing of selective metal (Fe<SUP>3+</SUP>) ions in aqueous solution
- Authors
- Santhamoorthy, Madhappan; Mohan, Anandhu; Mani, Kailasam Saravana; Devendhiran, Tamiloli; Periyasami, Govindasami; Kim, Seong-Cheol; Lin, Mei-Ching; Kumarasamy, Keerthika; Huang, Po-Jui; Ali, Asif
- Issue Date
- Mar-2024
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- Mesoporous silica nanoparticles; Nanosensors; Colorimetric sensor; Fe 3+ion sensing; Recyclability
- Citation
- METHODS, v.223, pp 26 - 34
- Pages
- 9
- Journal Title
- METHODS
- Volume
- 223
- Start Page
- 26
- End Page
- 34
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/91059
- DOI
- 10.1016/j.ymeth.2024.01.010
- ISSN
- 1046-2023
1095-9130
- Abstract
- The fabrication of red fluorescent hybrid mesoporous silica-based nanosensor materials has promised the bioimaging and selective detection of toxic pollutants in aqueous solutions. In this study, we present a hybrid mesoporous silica nanosensor in which the propidium iodide (PI) was used to conveniently integrate into the mesopore walls using bis(trimethoxysilylpropyl silane) precursors. Various characterization techniques including X-ray diffraction (XRD), Fourier-transform infrared (FTIR), N2 adsorption-desorption, zeta potential, particle size analysis, thermogravimetric, and UV-visible analysis were used to analyze the prepared materials. The prepared PI integrated mesoporous silica nanoparticles (PI-MSNs) selective metal ion sensing capabilities were tested with a variety of heavy metal ions (100 mM), including Ni2+, Cd2+, Co2+, Zn2+, Cr3+, Cu2+, Al3+, Mg2+, Hg2+ and Fe3+ ions. Among the investigated metal ions, the prepared PI-MSNs demonstrated selective monitoring of Fe3+ ions with a significant visible colorimetric pink color change into orange and quenching of pink fluorescence in an aqueous suspension. The selective sensing behavior of PI-MSNs might be due to the interaction of Fe3+ ions with the integrated PI functional fluorophore present in the mesopore walls. Therefore, we emphasize that the prepared PI-MSNs could be efficient for selective monitoring of Fe3+ ions in an aqueous solution and in the biological cellular microenvironment.
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