ABSTRACT
The structure of the title compound, C8H7IO3, at 90â K has monoclinic (P21/c) symmetry. The extended structure is layered and displays inter-molecular and intra-molecular hydrogen bonding arising from the same OH group.
ABSTRACT
The title compound C23H23N2Te+·PF6 -, is a monoclinic polymorph of the previously reported triclinic structure [Calitree et al. (2007 â¸). Organometallics, 26, 6248-6257]. In the crystal, parallel offset π-π stacking [shortest centroid-centroid separation = 3.9620â (9)â Å] and ionic inter-actions help to establish the packing.
ABSTRACT
Understanding guest exchange processes in metal-organic frameworks is an important step toward the rational design of functional materials with tailor-made properties. The dehydration of the flexible metal-organic framework [Co(AIP)(bpy)0.5(H2O)]â¢2H2O was studied by novel in situ dynamic x-ray diffraction techniques. The complex mechanism of dehydration, along with the as-yet unreported metastable structures, was determined. The structural information obtained by the application of these techniques helps to elucidate the important guest-host interactions involved in shaping the structural landscape of the framework lattice and to highlight the importance of utilizing this technique in the characterization of functional framework materials.
ABSTRACT
Diarylethene photochromes show promise for use in advanced organic electronic and photonic materials with burgeoning considerations for biological applications; however, these compounds typically require UV light for photoswitching in at least one direction, thus limiting their appeal. We here introduce a naphthoquinone-based diarylethene that switches between open and closed forms with visible light. The synthesis of this quinone diarylethene relies on Suzuki methodology, allowing for the inclusion of functional groups not otherwise accessible with current synthetic routes.
