Properties of Aliphatic Ligand-Based Metal-Organic Frameworks

Ligands with a purely aliphatic backbone are receiving rising attention in the chemistry of coordination polymers and metal-organic frameworks. Such unique features inherent to the aliphatic bridges as increased conformational freedom, non-polarizable core, and low light absorption provide rare and valuable properties for their derived MOFs. Applications of such compounds in stimuli-responsive materials, gas, and vapor adsorbents with high and unusual selectivity, light-emitting, and optical materials have extensively emerged in recent years. These properties, as well as other specific features of aliphatic-based metal-organic frameworks are summarized and analyzed in this short critical review. Advanced characterization techniques, which have been applied in the reported works to obtain important data on the crystal and molecular structures, dynamics, and functionalities, are also reviewed within a general discussion. In total, 132 references are included.

Automated summary

Ligands with a purely aliphatic backbone have become increasingly important in the chemistry of coordination polymers and metal-organic frameworks. Their unique characteristics, such as increased conformational freedom, non-polarizable core, and low light absorption, provide rare and valuable properties for derived MOFs. These compounds have found extensive applications in stimuli-responsive materials, gas and vapor adsorbents with high selectivity, light-emitting materials, and optical materials. This short critical review summarizes and analyzes the properties of aliphatic-based metal-organic frameworks, as well as reviews the advanced characterization techniques used in this field.