Chemistry Reference
In-Depth Information
Fig. 5.1
The promising
methods for constructing
POFs with catalytic property.
Reprinted with permission
from Ref. [
1
]. Copyright
2011, American Chemical
Society
5.2 POFs with Metal-Containing Sites for Catalysis
The catalytic properties of catalysts are determined by the types of the active
sites. Many studies have illustrated the strategies to construct porous materials
with catalytic properties. Thus the design and synthesis of catalytic POFs could
be directed according to the previous investigations. When we prepare catalytic
POFs, first, the general catalytic reaction is confirmed, and then we need to estab-
lish reasonable procedure to fulfill the targeted aims. It is notable that the active
site of POFs could be achieved by de novo or post-synthetic means.
5.2.1 POFs with Metal-Containing Sites for Catalysis
Incorporation of the required metal in the original building units is an easy and
direct method. The 2,2-Bipyridine, porphyrin ring, and phthalocyanines ring are
interesting powerful ligand with rich coordination chemistry in the square-planar
coordination site. Thus they provide potential for POFs to fulfill the demands for
the incorporation of the metals (Fig.
5.2
).
Jiang et al. described the synthesis and functions of a porous catalytic frame-
work based on conjugated micro- and mesoporous polymers with metalloporphy-
rin building blocks [
3
]. FeP-CMP was obtained using Suzuki polycondensation
reaction (Fig.
5.3
a). Based on its skeleton, FeP-CMP was attempted as a heteroge-
neous catalyst for the activation of molecular oxygen to convert sulfide to sulfox-
ide under ambient temperature and pressure (Fig.
5.3
b and Table
5.1
). FeP-CMP
presents high efficiency indicated by high conversion (up to 99 %) and a large
turnover number (TON
=
97,320). In addition, it is widely applicable to various
sulfides covering from aromatic to alkyl and cyclic substrates. Meanwhile it dis-
plays high selectivity to form corresponding sulfoxide under different reaction
conditions.
