Postsynthetic grafting

Ti-MCM-48 (surface area = 1000-1450 m2/g, pore volume = 0.8-1.1 cm3/g, pore diameter = 2.4-2.7 nm) was synthesized by hydrothermal and postsynthetic grafting techniques from cationic alkylammonium surfactants (22,25,323). 

Postsynthetic grafting and cocondensation methods both have advantages for the synthesis of ordered mesoporous organic-inorganic hybrids. However, what are the potential limitations that need to be considered for optimizing the material synthesis following these methods ... 

A) postsynthetic grafting (B) direct synthesis. R and R denote organic groups. (1) Hydroiysis, (2) condensation, and (3) template removai. (Adapted from Ref. [42].)... 

Postsynthetic grafting or mixing of preformed nanoparticles as well as the thermal decomposition involving single-molecule precursors or occurring at high temperatures is not covered in this chapter. 

Figure 3.7 Grafting (postsynthetic functionalization) for organic modification of mesoporous pure silica phases with terminal organotrialkoxysilanes of the type (R 0)3SiR. R = organic functional group.

Grafting of (Mesoporous) Silica Phases (Postsynthetic Functionalization)... 

Catalytically active sites can also be introduced through the postsynthetic functionalization of the MOF framework, while keeping its structure intact. Functionalization of the dehydrated MIL-101 through grafting of amine molecules, such as ethylene diamine (ED), diethylenetriamine (DETA), and... 

The second strategy is based on postsynthetic functionalization of a preexisting inorganic matrix. Mn(salen)-type complexes were covalently grafted onto the hybrid functionalized surface of porous silica (MCM-41) by reaction with vinyl substituted Schiff bases." ... 

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