Oxygen-sensing materials based on ruthenium(II) complex covalently assembled mesoporous MSU-3 silica

Oxygen-sensing materials based on ruthenium(II) complex covalently assembled mesoporous MSU-3 silica
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基于钌(II)配合物共价组装介孔MSU-3二氧化硅的氧传感材料

DOI:
10.1016/j.snb.2011.08.047
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发表时间:
2011-12
期刊:
Sensors and Actuators, B: Chemical
影响因子:
--
通讯作者:
Liu, Yingliang
Liu, Yingliang
中科院分区:
其他
文献类型:
--
作者:
Zhang, Haoran;Lei, Bingfu;Mai, Wenjie;Liu, Yingliang

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通过正硅酸乙酯与功能化Ru(II)配合物[Ru(Phen)2 Phen-Si]2+的共缩合反应,制备了由[Ru(Phen)3]2+部分共价接枝到功能化介孔MSU-3骨架上的新型氧敏材料(Phen= 1,10-菲咯啉,Phen-Si=2-[4′-{3-(三乙氧基甲硅烷基)丙基}苯基]咪唑并[4,5-f]-1,10-菲咯啉)在Pluronic P123表面活性剂作为模板的存在下进行。为了比较的目的,还制备了其中[Ru(Phen)3]2+常规地物理结合到基质中的第二氧敏感材料。采用傅里叶变换红外光谱、小角X射线衍射、扫描电镜、氮吸附/脱附分析和发光强度猝灭Stern-Volmer曲线对所制备的氧敏材料进行了表征。功能化介孔传感材料被发现是高度敏感的O2。结果还表明,共价接枝的样品表现出更好的可逆性和更高的光化学稳定性比物理掺入的样品,因为这些Ru(II)分子强烈共价接枝到Si-O网络通过CH 2-Si键。
Novel oxygen-sensing materials consisted of [Ru(Phen)3]2+portion covalently grafted to the functionalized mesoporous MSU-3 backbones are prepared by co-condensation of tetraethoxysilane and the functionalized Ru(II) complex [Ru(Phen)2Phen-Si]2+(Phen=1,10-phenanthroline, Phen-Si=2-[4′-{3-(triethoxysilyl)propyl}phenyl] imidazo [4,5-f]-1,10-phenanthroline) in the presence of Pluronic P123 surfactant as templates. For comparison purpose, the second oxygen-sensing materials in which [Ru(Phen)3]2+is conventionally physically incorporated into the matrix are also prepared. The obtained oxygen-sensing materials are characterized by Fourier transform infrared, small angle X-ray diffraction, scanning electron microscopy, nitrogen adsorption/desorption analysis, and luminescence intensity quenching Stern–Volmer plots. The functionalized mesoporous sensing materials are found to be highly sensitive to O2. The results also reveal that the covalently grafted sample exhibits better reversibility and higher photochemical stability than the physically incorporated sample since these Ru(II) molecules are strongly covalently grafted to the Si–O network via the CH2–Si bonds.
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