Optical activity measurements on solids. 6. Solid state optical activity and circular dichroism measurements of sodium thioantimonate nonahydrate

摘要

We have demonstrated that optical circular dichroism (CD) measurements can be carried out on powders suspended in a liquid medium. The refractive indices of the powder and the suspending liquid must be matched, the suspending liquid must not interact significantly with the solid to be measured and must not absorb in the region where the measurements are carried out. Sodium thioantimonate nonahydrate (Na3SbS4·9H2O) powders obtained by grinding oflevo- ordextro-rotatory crystals were found to be excellent examples for the demonstration of this technique. Measurements of the optical rotation forlevo- anddextro-rotatory crystals and powders of Na3SbS4·9H2O were also carried out and provided additional characterization of this salt. In the course of developing the CD measurement technique, CD of NaClO3and NaBrO3crystals was also measure