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 (N-3). 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.