A highly-efficient and environmental-friendly method for the preparation of Mn(III)-Salen complexes encapsulated HMS by using microwave irradiation

作者：Fu, Zaihui^*; Liao, Huiying; Xiong, Donglu; Zhang, Zehui; Jiang, Yan; Yin, Dulin

来源：Microporous and Mesoporous Materials, 2007, 106(1-3): 298-303.

DOI：10.1016/j.micromeso.2007.01.059

• microwave irradiation
• HMS
• Mn(III)-Salen complexes
• encapsulation
• trans-stilbene
• catalytic epoxidation

It was reported that the microwave-assisted in situ synthesis and encapsulation. of Mn(III)-Salen complexes inside the pores of the amino-functionalized mesoporous silicas of HMS. The prepared heterogeneous Mn(III)-Salen complexes via this method were characterized by diffusion reflection UV-Vis, FT-IR, TG-DTA and N-2 volumetric adsorption, and their catalytic properties were checked with the epoxidation of trans-stilbene with iodobenzene diacetate. The results indicated that, in comparison with the traditional adsorption method, the microwave-assisted approach was efficient and environmental-friendly, and could improve the loadings of Mn(III)-Salen complexes on HMS via a strengthening axial coordination of the surface's NH2 groups of HMS toward the Mn(III)-Salen complexes. Furthermore, the encapsulation of Mn(III)-Salen complexes inside the host HMS could be rapidly achieved by the HMS's porous outlets grafting a suitable molecular-size ester-terminated polyamidoester dendrimers under the microwave irradiation. As a result, the encapsulated Mn(III)-Salen complexes inside the HMS's pores showed a lower leaching, better catalytic activity and reusability than the un-encapsulated counterparts in catalyzing the epoxidation of trans-stilbene.

• 出版日期2007-11-1
• 单位湖南师范大学