High-Throughput Screening of Identity, Enantiomeric Excess, and Concentration Using MLCT Transitions in CD Spectroscopy

By Sonia Nieto, Vincent M. Lynch, Eric V. Anslyn, Hyunwoo Kim, Jik Chin

July 28, 2017

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Title

High-Throughput Screening of Identity, Enantiomeric Excess, and Concentration Using MLCT Transitions in CD Spectroscopy

Author

Sonia Nieto, Vincent M. Lynch, Eric V. Anslyn, Hyunwoo Kim, Jik Chin

Year

2008

Journal

JACS

Abstract

This manuscript describes a protocol for the fast determination of identity, enantiomeric excess (ee) and concentration of chiral 1,2-diamines, the combination of which has not previously been achieved, using the changes in the circular dichroism (CD) spectra of the charge-transfer bands of the Cu(I)-Binap complex. The spectra were analyzed with a variety of pattern recognition (PR) protocols. PR techniques were used to analyze unknown samples in a robotically controlled 96-well plate interfaced CD instrument. In less than two minutes per sample, ee and concentration values can be read with 2% and 8% error, respectively. The speed and accuracy as well as ability to simultaneously measure ee concentration and identity represent clear advantages over traditional methods and makes this method adaptable to true high-throughput screening.

Full Article

http://pubs.acs.org/doi/abs/10.1021/ja803443j

Instrument

J-815

Keywords

Circular dichroism, Coordination chemistry, Stereochemistry