Versatile Assembly of Metal-Coordinated Calixresorcinarene Cavitands and Cages through Ancillary Linker Tuning
Wen-Yuan Pei, Guohai Xu, Jin Yang, Hui Wu, Banglin Chen, Wei Zhou, Jian-Fang Ma
We propose a design strategy for assembly of metal-coordinated calixresorcinarene cavitands and cages by tuning of the ancillary linkers. Assembly of newly functionalized cavitand with angular isophthalic acid analogs afford three intriguing metal-coordinated cavitands with deep cavities, 1a-1c. Further, by mediating appropriate spacers between two isophthalic acids, two bowl-shaped cavitands are successfully joined together to produce three elegant coordination cages with tunable sizes and shapes, 2a-2c. The cavitand and cage crystals possess considerable amount of accessible porosities, as clearly established by gas adsorption measurements. Remarkably, 1a-1c also exhibit high structural flexibilities, reversibly transforming between the open-pore and the narrow-pore structures, upon removal and sorption of guest molecules, as evidenced by diffraction and gas adsorption measurements. By combining experimental studies with density functional theory (DFT) calculations, we thoroughly elucidated the mechanism of the structural transformations in response to external stimuli in this class of flexible porous solids.
, Xu, G.
, Yang, J.
, Wu, H.
, Chen, B.
, Zhou, W.
and Ma, J.
Versatile Assembly of Metal-Coordinated Calixresorcinarene Cavitands and Cages through Ancillary Linker Tuning, Journal of American Chemical Society, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=923453
(Accessed October 2, 2023)