Fluorescent liquid crystals (LCs) have attracted considerable interest owing to their unique combination of fluidity, anisotropy, and intrinsic emission. However, most reported fluo-rescent LCs exhibit high phase transition temperatures and/or smectic phases, limiting their practical applications. To address this, we designed and synthesized a series of 2,1,3-benzothiadiazole (BTD)-based fluorescent nematic liquid crystals incorporating do-nor (D) or acceptor (A) groups to form D–A–D or D–A–A structures. Most of the synthe-sized derivatives exhibited supercooled nematic phases at room temperature. They com-posed various functional groups, such as secondary alkylamine, branched alkyl chain, and trifluoroacetyl groups, which are rarely used in calamitic nematic LCs. Notably, di-methylamine- and carbonyl-substituted derivatives exhibited relatively high fluorescence quantum yields (Φfl) in both solid and mesophase states, demonstrating their potential as efficient fluorescent materials. Our findings underscore the versatility of BTD-based mesogenic skeletons for designing room-temperature fluorescent nematic LCs with vari-ous functional groups. These materials offer promising opportunities for next-generation display technologies, optical sensors, and photonic applications.
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