ja211340t_si_003.cif (14.05 kB)
Highly Selective Carbon Dioxide Uptake by [Cu(bpy-n)2(SiF6)] (bpy-1 = 4,4′-Bipyridine; bpy-2 = 1,2-Bis(4-pyridyl)ethene)
dataset
posted on 2012-02-29, 00:00 authored by Stephen
D. Burd, Shengqian Ma, Jason A. Perman, Benjamin J. Sikora, Randall Q. Snurr, Praveen K. Thallapally, Jian Tian, Lukasz Wojtas, Michael J. ZaworotkoA previously known class of porous coordination polymer
(PCP) of
formula [Cu(bpy-n)2(SiF6)]
(bpy-1 = 4,4′-bipyridine; bpy-2 = 1,2-bis(4-pyridyl)ethene)
has been studied to assess its selectivity toward CO2,
CH4, N2, and H2O. Gas sorption measurements
reveal that [Cu(bpy-1)2(SiF6)] exhibits the
highest uptake for CO2 yet seen at 298 K and 1 atm by a
PCP that does not contain open metal sites. Significantly, [Cu(bpy-1)2(SiF6)] does not exhibit particularly high uptake
under the same conditions for CH4, N2, and,
H2O, presumably because of its lack of open metal sites.
Consequently, at 298 K and 1 atm [Cu(bpy-1)2(SiF6)] exhibits a relative uptake of CO2 over CH4 of ca. 10.5:1, the highest value experimentally
observed in a compound without open metal sites. [Cu(bpy-2)2(SiF6)] exhibits larger pores and surface area than [Cu(bpy-1)2(SiF6)] but retains a high CO2/CH4 relative uptake of ca. 8:1.
