TY - JOUR
TI - A Microporous Co2+ Metal Organic Framework with Single-Crystal to
Single-Crystal Transformation Properties and High CO2 Uptake
AU - Eleni E. Moushi
AU - Andreas Kourtellaris
AU - Ioannis Spanopoulos
AU - Manolis J. Manos
AU - Giannis S. Papaefstathiou
AU - Pantelis N. Trikalitis
AU - Anastasios J. Tasiopoulos
JO - Crystal Growth & Design
PY - 2015
VL - 15
TODO - 1
SP - 185--193
PB - American Chemical Society (ACS)
SN - 1528-7483, 1528-7505
TODO - 10.1021/cg501141m
TODO - metal-organic frameworks
TODO - The synthesis and characterization of [Co-9(INA)(18)(H2O)(6)]center
dot 11DMF center dot 15H(2)O(8) (Co-9-INA center dot 11DMF center dot
15H(2)O) (INA(-) = the anion of isonicotinic acid) is reported. It
exhibits a rigid 3D-porous structure with a Co-9 repeating unit
consisting of four [Co-2(II)(mu-O2CR)(2)(mu-H2O)] subunits (two
unique) linked through bridging INA(-) ligands to an isolated Co-II ion
(half unique). The [Co-2(II)] dimers and the isolated Co-II ion have
assembled to create a trinodal (6,7,8)-coordinated network with point
symbol
(3(2).4(11).5(6).6(2))(2)(3(2).4(18).5(4).6(4))(2)(3(4).4(4).5(4).6(3)).
Gas sorption studies revealed that Co-9-INA exhibits 910 m(2) g(-1) BET
area, 4.2 mmol g(-1) CO2 uptake at 273 K/1 bar, and 6.7 CO2/CH4
selectivity at zero coverage. Furthermore, Co-9-INA displays capability
for exchange of the guest solvent molecules by various organic molecules
in a single-crystal to single-crystal fashion. Direct and alternating
current magnetic susceptibility studies revealed the existence of
dominant antiferromagnetic interactions between the Co2+ ions that
result in a paramagnetic ST = 3/2 spin ground state value. Overall, this
work emphasizes the potential of relatively simple and inexpensive
polytopic ligands, such as isonicotic acid, to stabilize microporous
MOFs with significant CO2 sorption capacity.
ER -