What is "metallomesogen"

n. (context chemistry English) Any mesogen that contains one or more metal atoms

A metallomesogen is a metal complex that exhibit liquid crystalline behavior. Thus, they adopt ordered structures in the molten phase, e.g. smectic and nematic phases. The dominant interactions responsible for their phase behavior are the nonbonding contacts between organic substituents. Two early classes of such materials are based on substituted ferrocenes and dithiolene complexes.