Issue 80, 2015

Self-assembly oxygen sensing thin film based on a Ru(ii) complex covalently grafted to porous anodized alumina oxide (AAO) templates

Abstract

A novel functional Ru(bpy)2(phen-NH2)(PF6)2 complex (bpy = bipyridyl, phen-NH2 = 5-amine-1,10-phenanthroline) is covalently bonded to an anodized alumina oxide (AAO) template through a “soft bridge” of 3-glycidoxypropyltrimethoxysilane (GPMS). This can form an oxygen sensor with the structure [Ru(bpy)2(phen-NH)/GPMS/AAO]. This oxygen sensing thin film was characterized using scanning electron microscopy (SEM) and fluorescence spectrophotometry. A series of cluster structures were observed on the surface of the AAO, the Ru(bpy)2(phen-NH2) fluorophore which was uniformly dispersed. The film proved to have good oxygen quenching properties owing to the great interaction between the fluorophore and molecular oxygen. Finally, a Stern–Volmer plot of the [Ru(bpy)2(phen-NH)/GPMS/AAO] thin film shows a good linearity with a fitting parameter R2 of 0.9948 when the oxygen concentration is 0%–80%, and the sensitivity rises to 10.47, which is 7.5 times greater than that of oxygen sensors based on sol–gel methods. A short response/recovery time of 7 s/15 s was achieved, which is almost 100% faster than that of sol–gel methods with the same fluorophore. When stored in the ambient air of the laboratory, there was no significant drift in intensity after 6 months. These characteristics result in the thin film of [Ru(bpy)2(phen-NH)/GPMS/AAO] being a promising candidate for sensitive oxygen sensors.

Graphical abstract: Self-assembly oxygen sensing thin film based on a Ru(ii) complex covalently grafted to porous anodized alumina oxide (AAO) templates

Supplementary files

Article information

Article type
Paper
Submitted
29 Apr 2015
Accepted
10 Jul 2015
First published
10 Jul 2015

RSC Adv., 2015,5, 65627-65634

Self-assembly oxygen sensing thin film based on a Ru(II) complex covalently grafted to porous anodized alumina oxide (AAO) templates

M. Cui, F. Wang, Z. Miao, Y. Xia, L. Yan, Y. Ma, H. Yao, H. Ling and Z. Qi, RSC Adv., 2015, 5, 65627 DOI: 10.1039/C5RA07809A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements