Abstract
A robust binary hydrogen-bonded supramolecular
organic framework
(
SOF-7
) has been synthesized by solvothermal reaction
of 1,4-bis-(4-(3,5-dicyano-2,6-dipyridyl)dihydropyridyl)benzene (
1
) and 5,5′-bis-(azanediyl)-oxalyl-diisophthalic acid
(
2
). Single crystal X-ray diffraction analysis shows
that
SOF-7
comprises
2
and 1,4-bis-(4-(3,5-dicyano-2,6-dipyridyl)pyridyl)benzene
(
3
); the latter formed
in situ
from
the oxidative dehydrogenation of
1
.
SOF-7
shows a three-dimensional four-fold interpenetrated structure with
complementary O–H···N hydrogen bonds to form
channels that are decorated with cyano and amide groups.
SOF-7
exhibits excellent thermal stability and solvent and moisture durability
as well as permanent porosity. The activated desolvated material
SOF-7a
shows high CO
2
adsorption capacity and selectivity
compared with other porous organic materials assembled solely through
hydrogen bonding.