Combinatorial synthesis of metal–organic frameworks libraries by click-chemistry

A key to address advanced MOF materials suitable for more sophisticated applications is to add functionalities of greater complexity in a controlled manner. We report a generic and original post-synthetic modification method starting from amino derived MOFs. The first step consists in converting the amino group into azide (N3). Without isolation nor purification, the desired functionalized material is obtained by grafting the corresponding alkyne using "Click Chemistry". This work reports for the first time the synthesis of a two-dimensional combinatorial library of 24 functionalized MOFs. We also show that the grafting yield can be controlled from 10 to 100%. Finally, we compare the effect of the grafting yield on the porous volume of (1D) and (3D)MOF porous structures.