1999 REU Participants

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Karlyn Skugrud

Karlyn is a junior at Hamline University majoring in Chemistry and minoring in Mathematics and Psychology.

Adsorption of Perfume Oils onto UOFMN
Karlyn Skugrud
Hamline University

Andreas Stein
Department of Chemistry, University of Minnesota

Crystal engineering of guanidinium disulfonate networks has demonstrated two main types of host/guest lattice architecture. Work proceeded in an attempt to pinpoint the guest volume at which the architecture changed from bilayer to brick. In the [G]2[4,4-biphenyl disulfonate] guest clathrates, the bilayer isomer formed with guests of molecular volume less that 128 �. The brick isomer is formed most often with guests larger than this value. Work was also done to synthesize and incorporate flexible extended length disulfonate pillars into these open framework structures. The longer flexible pillars, [G]2[1,2-bis(p-sulfophenoxy)ethane] [G]2[1,2-bis(p-sulfophenoxy)propane], were synthesized and successfully incorporated into host/guest clathrates. A sterically hindered pillar. [G]2[1.2-bis{3,5-dimethyl-4-sulfophenoxy)ethane}, was synthesized in hopes of creating a pillar that would be forced into the brick architecture due to sterics, but has yet to be incorporated into host/guest clathrate. Finally, the synthesis of a hetero pillar presented the possibility of a double bilyer structure, however, this too has to form a crystal structure.