Improving the Quality of Electrophoretically-fractionated Chiral Au38(SG)24 Nanoclusters through a Stepwise Phase-transfer Extraction Process: An Absorption and CD Spectroscopic Study

A stepwise phase-transfer extraction process improves the quality of electrophoretically-fractionated chiral Au38(SG)24 nanoclusters in water, as revealed by both absorption and CD spectroscopy. The effect of thiolate ligand structures on the CD response is then discussed. In the purified Au38 nanocluster compound, simultaneous deconvolution analysis of both the absorption and CD spectra makes the unresolved transitions clear. A stepwise phase-transfer extraction process improves the quality of electrophoretically-fractionated chiral Au38(SG)24 nanoclusters in water, which can be revealed by both absorption and CD spectroscopy. The effect of thiolate ligand structures on the CD response is then discussed. In the purified Au38 nanocluster compound, simultaneous deconvolution analysis of both absorption and CD spectra makes the unresolved transitions clear.