| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1308798 | Inorganica Chimica Acta | 2015 | 7 Pages |
•A core–shell structured nanocomposite was constructed for O2 sensing.•Fe3O4 and MCM-41 were used as the inner core and the outer shell, respectively.•A Ru(II) complex was modified and attached to MCM-41 tunnels.•Emission of this composite decreased with increasing O2 concentrations.•Sensitivity of 11.6 and response time of 21 s were obtained.
In this paper, a magnetic–emissive hybrid composite modified with Ru(II) complex was constructed aiming at site-specific oxygen sensing. Core–shell structure was applied in this composite with superparamagnetic Fe3O4 as inner core and silica molecular sieve MCM-41 as outer shell, respectively. A silane coupling ligand N-(5H-cyclopenta[1,2-b:5,4-b′]dipyridin-5-ylidene)-3-(triethoxysilyl)propan-1-amine (CDO-Si) and its corresponding Ru(II) complex were covalently connected into MCM-41 shell, acting as sensing probe. This composite was characterized and confirmed by SEM, TEM, XRD, IR, TGA and N2 adsorption/desorption. Its emission response to molecular O2 was investigated. It was found that composite emission decreased with increasing O2 concentrations, showing sensitivity of 11.6 and response time of 21 s.
Graphical abstractA core–shell structured nanocomposite for O2 sensing was reported, using superparamagnetic ferroferric oxide and silica molecular sieve MCM-41 as the inner core and the outer shell, respectively. Composite emission decreased with increasing O2 concentrations, showing sensitivity of 11.6 and response time of 21 s.Figure optionsDownload full-size imageDownload as PowerPoint slide
