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Fig. 3.11
Typical strategies for functionalizing phenyl rings. When certain reactive groups are
decorated, further modification could be performed
Fig. 3.12
Synthetic route for sulfonate functionalized PPNs. Chlorosulfonic acid or concen-
trated sulfonic acid could be used for the sulfonation reaction. Reprinted with permission from
Ref. [
14
]. Copyright 2013, Royal Society of Chemistry
