An automated sample environment for biological solution scattering experiments at third-generation synchrotrons

Abstract

C274 study, the apohost of 2 was determined from the laboratory powder X-ray diffraction data and the structural change by guest sorption and release processes were investigated. The powder X-ray diffraction data of the toluene inclusion crystal of 2 and the apohost crystal of 2, which was obtained by heating of the toluene inclusion crystal, are signifi cantly different as shown in the fi gure. However, interestingly, the apohost structure, determined from the laboratory powder X-ray diffraction data, was found to retain its crystal packing even after the guest release. The apohost has one dimensional stacking of 2 along the b-axis forming the one dimensional guest free tunnel. This tunnel is expected to absorb the guest molecules easily and, in fact, the apohost crystal readily absorbs the toluene molecules, when the toluene vapor was applied to the solid apohost, and it transforms into the toluene inclusion crystal within 20 min.