Structural Studies of Supramolecular Gyroscope-like Co-crystals

摘要: The construction of small-sized devices has attracted great amount of research interest for decades. Among these researches, rational design and synthesis of molecular devices based on supramolecules are fascinating topics [1]. In our attempts to design and synthesis of supramolecular gyroscopes [2], co-crystals between decamethonium diiodide (ie,[(CH3) 3N+(CH2) 10N+(CH3) 3][2I−]) and different para-dihalogen-substituted benzene moieties (ie, pC 6X2Y4, X= Br, I; Y= H, F) are obtained. Single-crystal X-ray diffraction (XRD) structures of three novel co-crystals exhibit supramolecular gyroscope-like structures constructed by halogen bonding of 1: 1 stoichiometry of two components [3]. Variabletemperature 19 F NMR experiments are used to distinguish between dynamic and static disorder of rotor in selected product materials. The variable-temperature 19 F NMR spectra of co-crystals are insensitive to …