Luminescent SiO2@Tb/guanosine 5′-monophosphate core-shell nanoscale coordination polymers for superoxide anion detection
| Autor: | Yue Du, Bingxian Peng, Li Yang, Li Wang, Mulan Zeng, Yonghai Song, Zhenzhong Huang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Nanostructure Chemistry 010401 analytical chemistry Guanosine 02 engineering and technology Polymer 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound Transmission electron microscopy Zeta potential Fourier transform infrared spectroscopy 0210 nano-technology Luminescence Selectivity |
| Zdroj: | Talanta. 191:74-80 |
| ISSN: | 0039-9140 |
| DOI: | 10.1016/j.talanta.2018.08.041 |
| Popis: | It is of great significance for superoxide anion (O2•−) detection due to its important role in regulation of biological function. The nanoscale coordination polymers (NCPs) core-shell nanostructures have attracted increasing interests for their nanosized-dependent properties. In this study, SiO2@Tb/guanosine 5′-monophosphate (GMP) NCPs with core-shell nanostructures was designed for O2•− detection. The SiO2@Tb/GMP NCPs core-shell nanostructures were produced by using SiO2 nanoparticles (NPs) as template to control their nano-size. First, Tb3+ was adsorbed on the surface of SiO2NPs by coordination with -COOH of SiO2NPs. Then the Tb/GMP NCPs shells were grown along the surface of SiO2NPs. The SiO2@Tb/GMP NCPs core-shell nanostructures were characterized with scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and Zeta potential. The resulted SiO2@Tb/GMP NCPs core-shell nanostructures displayed strong Tb/GMP emission which decreased linearly with the increased O2•− concentration in the range from 5.3 nM to 6.0 μM with a limit detection of 2.18 nM. And the SiO2@Tb/GMP NCPs core-shell nanostructures also exhibited good selectivity and high sensitivity in HEPES buffer at pH 7.4. |
| Databáze: | OpenAIRE |
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