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Báo cáo hóa học: " Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol | Dong et al. Nanoscale Research Letters 2011 6 484 http www.nanoscalereslett.eom content 6 1 484 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol 1 2 1 3 7 4 2 2 Huaze Dong Wenbo Tao Jianhong Bi Victoria Milway Zhiqiang Xu Shengyi Zhang Xiangchun Meng Wentao Bi2 Jian Li1 and Meng Li2 Abstract A feasible and effective self-assembly method to synthesize different scale coordination polymers in highly dilute solution from nanocrystals to microcrystals and to bulk crystals without any blocking agent has been described. The growth of crystalline particles was controlled by removing the particles at different reaction times to interrupt the growth at the desired size. The nano and microscale particles show better catalytic conversions and selectivities in the hydroxylation of phenols than the bulk crystals. Keywords self-assembly coordination polymer catalysis hydroxylation Introduction Within the large family of materials science nano- and microscale materials are of particular interest for their potential applications in many areas 1-10 . In many cases these materials exhibit an increase of macroscopic properties due to the microscopic size effect and to the surface effect 11-13 . However to date the vast majority of work on nano- or micro-materials has concentrated on purely inorganic compounds or clusters 14-16 . Recently along with the development of metal-organic framework materials 17 18 a new class of functionalized organic-inorganic hydrid nanomaterial commonly called microscale coordination polymers MCPs 19-21 has received great attention. These materials exhibit a higher level of structural tailorability with size- and morphology-dependent properties. These structures can also exhibit microporosity tunable fluorescence magnetic susceptibility and unusual catalytic activity and selectivity. Thus far a variety of .