An up-to-date review on halogen-bonded liquid crystals

The make use of non-covalent interactions in the discovery of new liquid crystalline (LC) materials has been a field of increasing concern. From a scientific point of view, halogen bonding is one of the most important non-covalent interactions for the construction of supramolecular structures. The present review describes the halogen-bonded thermotropic LC compounds and the importance of halogen bond interactions in them. Further, the review focuses on the detailed description of the halogen-bonded liquid crystalline molecules that are reported till date. Moreover, the discussion part is summarized and subdivided into simple halogen-bonded LCs, polymeric type of halogen-bonded LCs, halogen-bonded ionic LCs and photo-responsive halogen-bonded LCs for the better understanding. Further, the present review shows that the liquid crystalline organic materials based on halogen bonding interactions have very appealing properties and could be used effectively in the development of supramolecular actuators, sensors, and tunable photonic devices. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

This review highlights the importance of halogen bonding interactions in liquid crystalline materials, discussing various types of halogen-bonded LC molecules and their potential applications in developing supramolecular actuators, sensors, and tunable photonic devices.