Luminescence and oxygen sensing properties of ORMOSILs covalently grafted with a novel ruthenium(II) complex |
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| Authors: | Xiudong Wu Yan Cong Yanhong Liu Jun Ying Bin Li |
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| Institution: | (1) Department of Chemistry, Polyoxometalate Science Key Laboratory of Ministry of Education, Northeast Normal University, Changchun, 130024, People’s Republic of China;(2) Key Laboratory of Excited State Processes, Changchun Institute of Optics Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, People’s Republic of China |
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| Abstract: | A series of VTES/TEOS composite xerogels covalently grafted with a novel complex Ru(phen)2(Dppz-Si)Cl2 were prepared, using the alkoxysilane-modified dipyrido3,2-a:2′,3′-c]phenazine compound (denoted as Dppz-Si) as the second
ligand of the Ru(phen)2Cl2 (phen = 1,10-phenanthroline) complex and a precursor of the sol–gel process. Bulk xerogels were obtained by co-hydrolyzing
and co-condensation from a mixture of triethoxysilane (TEOS), Ru(phen)2(Dppz-Si)Cl2 and Vinyltriethoxysilane (VTES). The luminescence intensity of composite xerogels is enhanced by 18.2 times, and the sensitivity
is improved from 1.1 to 3.1 by optimizing the molar ratio of VTES to TEOS. The composite xerogel containing 80% VTES in precursor
was optimal, exhibiting the maximum luminescence intensity and sensitivity. These results indicate that the complex Ru(phen)2(Dppz-Si)Cl2 is sensitive to oxygen concentration, VTES is a kind of excellent organic modifier and can greatly improved photoluminescent
(PL) and oxygen sensing performances. |
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| Keywords: | Oxygen sensor ORMOSILs Covalent grafting Ruthenium(II) complex |
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