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Abstract
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Many Pd complexes have been used as homogeneous catalysts incross-coupling reactions [1]. Although some of the Pd complexes have potential for recycling [2,3], most of them haveproblems such as deactivation and difficult separation from the solution. Thus, it is necessary to develop heterogeneous catalysts which can easily be recovered from the reaction system and reused [4, 5]. Recently, Ryoo and co-workers reported a new cubic mesoporous silica material named KIT-6, which was prepared using triblock copolymer (P123) as the mesopore directing agent. KIT-6 possesses large readily tunable pores with thick pore walls, high thermal stability, high specific surface area and large pore volume. Therefore, mesoporous KIT-6 can be used as a support for the synthesis heterogeneous catalysts. In this work, a new Schiffbase complex ofPd(II) was fabricated on the surface ofKIT-6. For this purpose Schiff-base ligand was synthesized from condensation
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