Multiferroic metal organic frameworks with perovskites structure

Hybrid inorganic-organic or Metal-Organic Frameworks (MOFs) are compounds consisting of metal ions or clusters coordinated to often rigid organic molecules to form one-, two-, or three-dimensional structures that can be porous. More formally a MOF is a coordination network with organic ligands containing potential voids. Most of the efforts on this materials have been focused on discovering porous MOFs for gas storage applications, such as hydrogen and carbon dioxide. But not much attention has been payed to other physical properties for which oxides are usually known, like multiferroic behavior. A review of the scientific community works on these nanoporous hybrid frameworks, will be given, showing how, due to the large tunability of their pore size, unprecedented properties and applications can be exploited. Moreover filling their cavities with proper materials, allows to tune their optical, electronic, or magnetic properties by guest interactions. Second-Harmonic Generation (SHG) is proposed as optical technique to confirm a paraelectric-ferroelectric phase transition under the critical temperature for multiferroic metal organic frameworks with perovskites structure.