Physics

Glass transition

Amorphous metal

Phase transition

Adsorption

Nanotechnology

Organic chemistry

Metal-organic framework

Chemistry

Materials science

Programming language

Crystal (programming language)

Computer science

Phase (matter)

Polymer

Amorphous solid

Thermodynamics

Chemical Reviews

The crystal–liquid–glass phase transition of coordination polymers (CPs) and metal–organic frameworks (MOFs) offers attractive opportunities as a new class of amorphous materials. Unlike conventional glasses, coordination chemistry allows the utilization of rational design concepts to fine-tune the desired properties. Although the glassy state has been rare in CPs/MOFs, it exhibits diverse advantages complementary to their crystalline counterparts, including improved mass transport, optical properties, mechanical properties, and the ability to form grain-boundary-free monoliths. This Review discusses the current achievements in improving the understanding of anomalous phase transitions in CPs/MOFs. We elaborate on the criteria for classifying CP/MOF glasses and comprehensively discuss the three common strategies employed to obtain a glassy state. We include all CP/MOF glass research progress since its inception, discuss the current challenges, and express our perspective on future research directions.

Metal–Organic Network-Forming Glasses