Limits...
Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol.

Dong H, Tao W, Bi J, Milway V, Xu Z, Zhang S, Meng X, Bi W, Li J, Li M - Nanoscale Res Lett (2011)

Bottom Line: 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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry and Chemical Engineering, Hefei Normal University, Hefei 230061, People's Republic of China. dapdong@yahoo.com.cn.

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.

No MeSH data available.


Related in: MedlinePlus

Comparison of the experimental powder diffraction patterns of the recycled MCPs-1.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211998&req=5

Figure 9: Comparison of the experimental powder diffraction patterns of the recycled MCPs-1.

Mentions: The recyclability of the MCPs-1 has been tested for a typical run, by filtering the reaction mixture after 5 h. The used catalyst was activated by stirring the catalyst with double distilled water for 1 h followed by filtration. This process was repeated twice and the catalyst was dried at 60°C under nitrogen for 1 h. It was reused for a run under similar conditions. It showed similar catalytic activity for the first cycle and there was a very minor loss for the second cycle (Table 3). Experimental PXRD patterns of the used catalyst and fresh catalyst were also nearly the same (Shown in Figure 9). All these studies suggest that the catalyst is sufficiently stable and recyclable. The filtrate collected after separating the used catalyst was placed in the reaction flask and the reaction was continued for another 5 h after adding fresh H2O2. No significant change was observed in the percentage conversion of phenol.


Self-assembly of copper and cobalt complexes with hierarchical size and catalytic properties for hydroxylation of phenol.

Dong H, Tao W, Bi J, Milway V, Xu Z, Zhang S, Meng X, Bi W, Li J, Li M - Nanoscale Res Lett (2011)

Comparison of the experimental powder diffraction patterns of the recycled MCPs-1.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211998&req=5

Figure 9: Comparison of the experimental powder diffraction patterns of the recycled MCPs-1.
Mentions: The recyclability of the MCPs-1 has been tested for a typical run, by filtering the reaction mixture after 5 h. The used catalyst was activated by stirring the catalyst with double distilled water for 1 h followed by filtration. This process was repeated twice and the catalyst was dried at 60°C under nitrogen for 1 h. It was reused for a run under similar conditions. It showed similar catalytic activity for the first cycle and there was a very minor loss for the second cycle (Table 3). Experimental PXRD patterns of the used catalyst and fresh catalyst were also nearly the same (Shown in Figure 9). All these studies suggest that the catalyst is sufficiently stable and recyclable. The filtrate collected after separating the used catalyst was placed in the reaction flask and the reaction was continued for another 5 h after adding fresh H2O2. No significant change was observed in the percentage conversion of phenol.

Bottom Line: 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.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry and Chemical Engineering, Hefei Normal University, Hefei 230061, People's Republic of China. dapdong@yahoo.com.cn.

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.

No MeSH data available.


Related in: MedlinePlus