Synthesis of alanine-based colorimetric sensors and enantioselective recognition of aspartate and malate anions |
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Authors: | Lin Wei-Chi Tseng Yu-Ping Lin Chi-Yung Yen Yao-Pin |
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Institution: | Department of Applied Chemistry, Providence University, 200 Chungchi Road, Sha-Lu, Taichung Hsien 433, Taiwan. |
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Abstract: | Two chiral colorimetric sensors (1,2) were synthesized and characterized by spectroscopic techniques and their enantioselective recognition of chiral dicarboxylic anions (D/L-aspartate and D/L-malate) was examined by UV-vis and (1)H NMR spectroscopy. Interaction of the receptors 1 and 2 with the enantiomers of aspartate or malate caused different color changes, and they act as optical chemosensors for the recognition of D-aspartate vs. L-aspartate and d-malate vs.l-malate. Receptor 1 exhibits high enantioselective binding for aspartate anions K(A(D))/K(A(L)) = 12.15]. |
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