{"knowledge_schema": {"broad_category": "Materials Science \u2192 Liquid Crystals \u2192 Phase Behavior", "refinement": "This problem focuses on the design of liquid crystal materials, specifically targeting the structural characteristics that influence phase behavior and transition temperatures.", "specific_scope": "The task is to identify the appropriate molecular structure that allows for the desired nematic or smectic phases and transitions within a specific temperature range (20-25\u00b0C).", "goal": "Select a molecular design that incorporates a single benzene ring in the core to achieve the desired liquid crystal properties."}, "summary": "The problem involves designing a liquid crystal material that exhibits specific phase behaviors (nematic or smectic) and transitions at a defined temperature range. The focus is on selecting the right molecular structure, with the correct choice being an aromatic core with a single benzene ring. This design is crucial for achieving the desired liquid crystal properties, as the presence of a benzene ring can influence the molecular interactions and phase stability."}