Constructing Crystalline Heterometallic Indium–Organic Frameworks by the Bifunctional Method

In this work, we systematically report four indium–organic framework (InOF) crystals, which comprise the In­(CO2)4 monomer for [InCu­(inc)4]­(NO3) (InOF-5) and [Me2NH2]2[In2(Cu4I4)­(pdc)4] (InOF-6), the In­(OH)­(CO2)2 chain for [In2(Cu4I4)­(OH)2(nia)4] (InOF-7), and In3O­(CO2)6 clusters for [(In3O)2(Cu4I4)3(nia)12(H2O)6]­(NO3)2 (InOF-8). With the help of the ligand-oriented bifunctional method, a series of novel heterometallic indium–organic frameworks can be easily achieved through the way the pyridyl N-affinitive sites connect to Cu-based units and the COO–-affinitive sites to In­(III) centers. This new strategy will open the door to the construction of multifunctional and heterometallic InOF materials.