On a magnetic-luminescent nanocomposite for oxygen sensing application: Construction, characterization and sensing performance

• A magnetic-luminescence nanocomposite for oxygen sensing was reported.
• Fe3O4 and MCM-41 were chosen as the inner core and the outer shell, respectively.
• A Ru(II) complex was grafted into MCM-41 shell, serving as sensing probe.
• Sensitivity of 5.8 and response time of 16 s were obtained.

This paper was devoted to the construction of a magnetic-luminescence nanocomposite for oxygen sensing application, where superparamagnetic Fe3O4 and silica molecular sieve MCM-41 were chosen as the inner core and the outer shell, respectively. A Ru(II) complex was grafted into MCM-41 shell through a coupling ligand N1-(5H-cyclopenta[1,2-b:5,4-b′]dipyridin-5-ylidene)benzene-1,4-diamine (denoted as Dafo-Ph-NH2). The final composite was analyzed by electron microscope images, XRD, IR spectra, thermogravimetry and N2 adsorption/desorption. Oxygen sensing performance of this composite was evaluated. Sensitivity of 5.8 (the ratio of emission intensity in pure N2 to that in pure O2) and response time of 16 s were obtained with good photostability.

Figure optionsDownload as PowerPoint slide