engleski

Impact of Halides and Halogen Atoms on Mechanical Flexibility of Cd(II) Coordination Polymers

Mechanical flexibility is a highly desired property of crystalline materials as it determines their potential usage in emerging technologies [1- 2]. Unfortunately, most synthetic crystalline materials are largely incapable of mobility and dynamic responsiveness to an external mechanical stimulus. Coordination polymers, as typical crystalline solids, tend to be brittle and inelastic, but recently it has been shown that some families of those compounds are able to respond elastically to applied external pressure [3]. It was demonstrated that slight differences in strength and geometry of intermolecular interactions, namely halogen and hydrogen bonds, combined with substantial structural interlocking, orthogonal to the direction of crystal elongation, are critical for inducing and controlling the highly unusual mechanical responses of crystalline metal-based polymeric materials. Herein we present a new family of Cd(II) crystalline coordination polymers, involving halides and a number of functionalities intended to fine-tune the supramolecular forces, displaying a variety of flexible responses. Careful design of 1-D metal- based polymeric building units, complemented with various state-of-the-art techniques for characterization and quantification of flexible properties, allowed for systematic mapping out the nature and extent of mechanical flexibility in response to slight structural changes introduced to the system, what in turn enabled elucidating the role of both halides and halogen atoms in imparting the flexibility to this class of crystalline materials [4].

mechanical flexibility, crystals, coordination polymers, cadmuium(II)

nije evidentirano