G. B. Gardner, Y.-H. Kiang, Stephen Lee
Jul 24, 1996
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Influential Citations
87
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Journal
Journal of the American Chemical Society
Abstract
Properties such as guest removal and exchange within a host crystal are investigated for benzene·1,3,5-tris(4-ethynylbenzonitrile)(1)·silver triflate(AgOTf) (polymorph A). The 15 A × 22 A channels in the crystal structure are retained through both guest exchange and complete guest removal. The apohost (defined to be a host without guests system) exhibits selectivity for new guests by absorbing aromatic molecules (ranging from 1.5−4 guests per molecule of 1) and not aliphatic molecules from the vapor phase. In solution, guests such as toluene, undecane, and benzyl alcohol are shown to be accomodated typically with two to three guest molecules for every molecule of 1. Guest exchange of nonfunctionalized aliphatic and aromatic molecules make no changes in the original benzene·1· AgOTf adduct orthorhombic cell parameters (11.625(3) A × 19.110(7) A × 38.856(15) A) greater than 0.4 A for any axis. However, crystals containing alcoholic aromatic molecules can be indexed to the two-dimensional rectangular analog ...