Circularly polarized absorption properties of Mn doped Au clusters

The optical properties of the doped and undoped gold clusters prepared using a cost effective ligand mediated wet chemical method have been studied in the presence of unpolarized and circularly polarized light excitation. The discretized HOMO (highest occupied molecular orbital) and LUMO (lowest unoccupied molecular orbital) resulted strong excitonic absorption band at wavelengths 371.5 and 382.4 nm in case of both Au8 and Au7Mn clusters, respectively. The contrasting chirality properties have been observed between Au8 and Au7Mn clusters that has corroborated from the circularly dichroic (CD) analysis. The Au8 clusters exhibit a negative chirality (i.e. a prominent CD band at 374.8 nm and a weak band at 348.9 nm) in contrary to a positive chirality (i.e. a prominent CD band at 371.6 nm and a weak band at 387.2 nm) from the doped sample.The optical properties of the doped and undoped gold clusters prepared using a cost effective ligand mediated wet chemical method have been studied in the presence of unpolarized and circularly polarized light excitation. The discretized HOMO (highest occupied molecular orbital) and LUMO (lowest unoccupied molecular orbital) resulted strong excitonic absorption band at wavelengths 371.5 and 382.4 nm in case of both Au8 and Au7Mn clusters, respectively. The contrasting chirality properties have been observed between Au8 and Au7Mn clusters that has corroborated from the circularly dichroic (CD) analysis. The Au8 clusters exhibit a negative chirality (i.e. a prominent CD band at 374.8 nm and a weak band at 348.9 nm) in contrary to a positive chirality (i.e. a prominent CD band at 371.6 nm and a weak band at 387.2 nm) from the doped sample.