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gin-type POM, the catalyst could not be recycled. Neverthe-
less, these Cu-POM hybrids were active at room temperature
and gave excellent selectivities for 1-tetralone and 2-tetralone,
especially the [Cu(bpy)]2POM BB hybrid catalyst.
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The successful heterogenization onto POM merits further
investigation [31–33]. Like enzymes, a particular ligand-metal
architecture can create supramolecular interactions that can
induce the formation of selective recognition sites on such
hybrid materials. In contrast to steric constraints that block
some reactions, these positive interactions would guide the
reactants toward the active site, recognize it through specific
interactions, and hence stabilize this couple in an environment
for the desired chemical transformation. Targeting the same
oxidation reaction, Corma and co-workers [9,34] recently
proposed a smart strategy to design Co and Cu-containing
metal organic frameworks by modifying the proportion of the
two metals.
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Fernandes C, Dariva C, Egues S M, Bortoluzzi A J, Antunes O A
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Further studies are under progress in our group to encapsu-
late these biomimetic Cu(II) complexes in porous silica hosts,
like zeolites [35] and mesoporous silica.
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Acknowledgements
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Berlin: Springer-Verlag, 1958
The authors are grateful to Thierry Romero, Nathalie
Kyritsakas-Gruber, and Suzanne Libs for their technical as-
sistance. We would like to dedicate this contribution to Prof.
O.A.C Antunes for his clever advice, friendship, and extreme
kindness all the time.
24 Mothé-Esteves P, Pereira M M, Arichi J, Louis B. Cryst Growth
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