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Colorimetric enantiodiscrimination of mandelic acid by indicator displacement assay 被引量:1
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作者 Xue-Xian Chen Li-Ming Yuan 《Chinese Chemical Letters》 SCIE CAS CSCD 2015年第8期1019-1021,共3页
The colorimetric enantiodiscrimination between mandelic acid and L-proline-Cu(II) is exploited to develop enantioselective indicator displacement assays. The sensitivity of the assay could be tuned by using a colori... The colorimetric enantiodiscrimination between mandelic acid and L-proline-Cu(II) is exploited to develop enantioselective indicator displacement assays. The sensitivity of the assay could be tuned by using a colorimetric indicator. The chromophoric ligand, pyrocatechol violet, effectively competes with the mandelic acid guest for open coordination sites on L-proline-Cu(II). The △A could be increased to 0.12 by changing the ratio of(+)- and(-)-mandelic acid concentrations that were found to be optimal from the displacement experiments. The resultant enantiomer excess versus △A relationship is linear. From the calibration curves, the absorbance values of the unknowns may be calculated for the enantiomeric excess value and the colorimetric enantiodiscrimination of mandelic acid can thus be obtained. 展开更多
关键词 proline indicator reserved resultant calibration excess violet guest isotherm tuned
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