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Manganese‐Doped Highly Ordered Mesoporous Silicate with High Efficiency for Oxidation Suppression
Authors:Dr. Chang Woo Kim  Dr. Minhyuk Kang  Prof. Bongjin Moon  Prof   . Jinheung Kim  Prof. Young Soo Kang
Affiliation:1. Korea Center for Artificial Photosynthesis, Department of Chemistry, Sogang University, Seoul, 121‐742 (Korea), Fax: (+82)?2‐701‐0967;2. Department of Chemistry, Sogang University, Seoul, 121‐742 (Korea);3. Department of Chemistry and Nano Science, Ewha Womans University, Seoul, 120–750 (Korea)
Abstract:Herein, we demonstrate a facile approach to manganese‐doped highly ordered mesoporous silicate with oxidation‐suppression function. As biocompatible supports of guest ions, the ordered mesoporous silicate was synthesized by evaporation‐induced self‐assembly. The phase‐transition from disordered to lamellar structures in the highly ordered mesoporous structure of these porosity‐tuned materials was controlled by adjusting the concentration of a lab‐made polystyrene‐b‐polyethylene oxide copolymer. Manganese was successfully incorporated as a guest in the hexagonally packed mesoporous silicate by using an ultrasound‐assisted technique. The incorporation of manganese ions into the pores of a mesoporous silicate support could be induced for host–guest functional applications. Manganese‐doped mesoporous silicate structures have been examined for their use as antioxidizing agents by electron spin resonance (ESR) measurements and radical‐scavenging tests. The manganese atoms in the mesoporous structures could act in a free‐radical‐scavenging capacity, much like manganese nanoparticles. The high efficiency of their oxidation‐suppression function is extended for application to catalytic products.
Keywords:doping  host–  guest systems  manganese  mesoporous materials  radical scavengers
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