In this study, hydrogen bond acceptors(HBA) including tetrabutylammonium chloride, tetraethylammonium chloride, tetrabutylammonium bromide, tetrabutylphosphonium chloride, and butyltrimethylammonium chloride were combined with chiral hydrogen bond donors(HBD) to form deep eutectic solvents(DES). These mixtures exhibit hydrogen bonding that lowers the mixture’s freezing point. The properties of the DES can be manipulated by the components’ chirality. The HBDs studied are L-leucic acid and methyl-(2R)-2-hydroxy-3-phenyl propanoate. The HBAs and HBDs were combined in ratios of 1:1, 2:1, 3:1, and 1:2. The most successful combinations occurred at 1:1 and 1:2 ratios. Combinations that successfully formed a DES were analyzed through their physical properties including density, viscosity, water content, and melting point. A europium complex was dissolved in the chiral DES to measure to determine if circularly polarized luminescence(CPL) was produced. The CPL and physical property results will be discussed in terms of the DES composition.

Circularly polarized luminescence induced by deep eutectic solvents

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