Pyrrol-2-yl-methanone Modified Silica as Electron Acceptor for the Oxidation of Water Catalyzed by Cobalt(II) Complexes

作者：Wu Yi; Wang Li; Chen Qiuyun^*

来源：Chemical Research in Chinese Universities, 2015, 31(5): 797-800.

DOI：10.1007/s40242-015-5156-5

• Silica
• Water oxidation
• Electron acceptor

To develop a new type of non-oxidant electron acceptors for water oxidation, 3-(methyl)phenyl-(3,5-dimethyl-1H-pyrrol-2-yOmethanone modified silica(SiO2@py) was synthesized and used as host to Co4O4 cubane forming nanoparticles(SiO2@pyCo(4)). In the presence of Ru(bpy)(3)(2+) and under the irradiation of white LED(light emitting diode) light(10 W), SiO2@pyCo(4) can catalyze water oxidation without extra electron acceptor(e.g., Na2S2O8). Moreover, the turnover frequency(TOF) value of SiO2@pyCo(4) is larger than that of Co4O4 cubane under the same conditions, and the longer lasting time of SiO2@pyCo(4) indicates that SiO2@py can enhance the stability of Co4O4 in water. Our results provide an economic route to develop dioxygen evolution systems based on the assembly of organic electron acceptor modified silica with active cobalt complexes.

• 出版日期2015-10
• 单位江苏大学