Chemistry - A European Journal
Chemistry - A European Journal
5 years ago

Water-Mediated Structural Transformations of CuII 5-Halonicotinates Coordination Networks with Distinct Mechanisms

Water-Mediated Structural Transformations of CuII 5-Halonicotinates Coordination Networks with Distinct Mechanisms
Miao Du, Cheng-Peng Li, Hang Zhou, Yue Ju
Currently, no unequivocal evidence is given for elucidation of “black box” during the structural transformations of dynamic crystalline materials. Here, three types of mechanisms are revealed for such transformations through X-ray diffraction and optical microscopy; namely, single-crystal to single-crystal (SC–SC), as well as “core-to-core” and “core-on-shell” processes. As confirmed by time-lapse optical microscopy, the latter two cases can be properly ascribed as partial recrystallization processes, while the former one is a continuous process with two different crystal lattices simultaneously maintained in one single crystal. Interestingly, these three distinct pathways can be exquisitely realized by changing only the halogen substituent (from -F, -Cl, to -Br) of the organic ligands in the coordination supramolecular systems. Lifting the lid: Structural transformations of dynamic crystals are usually seen as a black box process. Here the transformations are followed by crystallography and optical microscopy, and three different mechanisms are revealed.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201702405

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