Optical oxygen sensing properties of mesoporous SBA-15 with a covalently grafted ruthenium (II) complex

Document Type

Article

Publication Date

10-1-2007

Abstract

Novel oxygen sensing materials consisted of [Ru (Phen)3]2+ portion covalently grafted to the functionalized mesoporous SBA-15 backbones are prepared by co-condensation of tetraethoxysilane (TEOS) and the functionalized Ru(II) complex [Ru(Phen)2Phen-Si]2+ in the presence of Pluronic P123 surfactant as a template. The obtained oxygen sensing materials are characterized by Fourier transform infrared (FTIR) and luminescence intensity quenching Stern-Volmer curves. The Demas and Lehrer models are used to fit the obtained nonlinear Stern-Volmer curves. The functionalized mesoporous sensing materials appear to be highly sensitive to the O2 concentration in N2. The results show that the covalently-grafted sample shows reversible signals and higher photochemical stability since these Ru(II) molecules are strongly covalently-grafted to the Si-O network via the CH2-Si bonds.

Publication Source (Journal or Book title)

Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities

First Page

1920

Last Page

1924

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