Solvent Induced Pseudopolymorphism in a Calixarene-Based Porous Host Framework

The self-assembly properties of the proximal p-tert-butylcalix[4]dihydroquinone compound have been studied to investigate the role played by crystallization conditions in driving the formation of a previously reported cubic porous framework. In chloroform and anhydrous ethyl acetate, the mutual inclusion of the tert-butyl groups is favored, leading to the cubic porous structure; otherwise, in the presence of a higher water amount, the OH groups provide H-bonds with bridging water molecules and a new triclinic crystal structure is obtained, in which the calixarene molecules include chloroform inside their cavities. By exposing a cubic/triclinic powder mixture to acetonitrile vapors, a new monoclinic chiral crystal structure is obtained by supramolecular assembly of calixarene, acetonitrile, and water molecules with the formation of single handed helices.


Published in:
Crystal Growth and Design, 10, 4, 1527-1533
Year:
2010
Publisher:
American Chemical Society
ISSN:
1528-7483
Keywords:
Laboratories:




 Record created 2010-07-18, last modified 2018-12-03


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