Converting a Non-Porous Rare-Earth Metal-Organic Framework into a Porous Yttrium-Based NH 2 UiO-66 Network via a Linker Exchange Approach.

The solvent-assisted linker exchange (SALE) method was used to produce amino-functionalized yttrium-based UiO-66 [NH 2 UiO-66(Y)], which is not obtainable via a direct synthetic method. Remarkably, SALE not only produced relatively highly porous NH 2 UiO-66(Y) from completely non-porous 3,3-bpdc-Y but also changed the network topology from 8-connected bcu in 3,3-bpdc-Y to 12-connected fcu in NH 2 UiO-66(Y). Based on our knowledge, this is one of the rare cases where SALE changes the whole network topology of the resulting metal-organic framework. NH 2 UiO-66(Y) also showed promising ability for selective detection of Cu 2+ at a low concentration.