Mesostructured silica chemically doped with Ru-II as a superior optical oxygen sensor

	Mesostructured silica chemically doped with Ru-II as a superior optical oxygen sensor
其他题名	论文其他题名
	Lei B. F.; Li B.; Zhang H. R.; Lu S. Z.; Zheng Z. H.; Li W. L.; Wang Y.
	2006
发表期刊	Advanced Functional Materials
ISSN	1616-301X
卷号	16 期号:14 页码:1883-1891
摘要	Novel oxygen sensors consisting of a [Ru(bpy)(2)phen](2+) (bpy: 2,2'-bipyridyl, phen: phenathroline) portion covalently grafted to a mesostructured silica-based network are prepared in situ via a sol-gel approach with the help of cetyltrimethylammonium-bromide (CTAB) surfactant. 1,10-Phenanthroline covalently grafted to 3-(triethoxysilyl)propyl isocyanate is used as not only the sol-gel precursor but also as the second ligand of the Ru(bpy)(2)Cl-2 center dot 2H(2)O complex to prepare the sol-gel-derived mesostructured silicates for an oxygen sensor. For comparison purposes, the oxygen sensors in which [Ru(bpy)(2)phen]Cl-2 is conventionally physically incorporated into the matrix are also prepared. Elemental analysis, NMR, Fourier transform IR, UV-vis electronic absorption, luminescence-intensity quenching Stern-Volmer plots, and excited-state decay analysis are used to characterize the obtained oxygen sensors. These obtained bulk xerogels and spin-coated thin films show that the homogeneity and the sensitivity of the covalently grafted samples are superior to those of the physically incorporated ones, and the highest sensitivity is obtained in the mesostructured bulk xerogel. This improvement in oxygen sensitivity is attributed to the increased diffusivity of oxygen in the uniform and nearly parallel porous structure of the Mobil Catalytic Material 41 mesostructured matrix, the enhanced homogeneity results from the covalently grafted propyl group in -Si-(CH2)(3)- that acts as the fundamental spacer which prevents interaction between the attached Run complex and the silica matrix, and optimal dispersion in the mesopores during the sol-gel polycondensation. Furthermore, the greatly minimized leaching effect of the sensing molecules could be observed in the covalently grafted system. The covalent grafting strategy presented in this paper provides superior optical oxygen sensors with homogeneous distribution, improved sensitivity, and simplified calibration plots.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/24943
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Lei B. F.,Li B.,Zhang H. R.,et al. Mesostructured silica chemically doped with Ru-II as a superior optical oxygen sensor[J]. Advanced Functional Materials,2006,16(14):1883-1891.
APA	Lei B. F..,Li B..,Zhang H. R..,Lu S. Z..,Zheng Z. H..,...&Wang Y..(2006).Mesostructured silica chemically doped with Ru-II as a superior optical oxygen sensor.Advanced Functional Materials,16(14),1883-1891.
MLA	Lei B. F.,et al."Mesostructured silica chemically doped with Ru-II as a superior optical oxygen sensor".Advanced Functional Materials 16.14(2006):1883-1891.

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