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

作者：Li, Cheng-Peng; Zhou, Hang; Ju, Yue; Du, Miao^*

来源：Chemistry - A European Journal, 2017, 23(53): 12985-12990.

DOI：10.1002/chem.201702405

• coordination polymers
• dynamic crystals
• mechanism
• structural transformations
• substituent effects

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.

• 出版日期2017-9-21
• 单位天津师范大学