Phenol is an aromatic compound containing hydroxyl groups, which introduce polarity and reactivity to LC building blocks. The presence of hydroxyl groups allows hydrogen bonding interactions, which can affect the molecular packing and mesogenic behavior of LC compounds. Phenol is often used as a precursor for the synthesis of functional liquid crystal materials, enabling the preparation of compounds with tailored properties. These compounds have applications in a variety of liquid crystal-based technologies, including displays, photonic devices, and sensors. The hydroxyl groups also provide handles for further chemical modifications, enabling the preparation of a wide range of LC materials.