Polycatenated 2D Hydrogen-Bonded Binary Supramolecular Organic Frameworks (SOFs) with Enhanced Gas Adsorption and Selectivity.

Controlled assembly of two-dimensional (2D) supramolecular organic frameworks (SOFs) has been demonstrated through a binary strategy in which 1,4-bis-(4-(3,5-dicyano-2,6-dipyridyl)pyridyl)naphthalene (), generated by oxidative dehydrogenation of 1,4-bis-(4-(3,5-dicyano-2,6-dipyridyl)dihydropyridyl)naphthalene (), is coupled in a 1:1 ratio with terphenyl-3,3',4,4'-tetracarboxylic acid (; to form ), 5,5'-(anthracene-9,10-diyl)diisophthalic acid (; to form ), or 5,5'-bis-(azanediyl)-oxalyl-diisophthalic acid (; to form ). Complementary O-H···N hydrogen bonds assemble 2D 6- (honeycomb) subunits that pack as layers in to give a three-dimensional (3D) supramolecular network with parallel channels hosting guest DMF (DMF = ,'-dimethylformamide) molecules. and feature supramolecular networks of 2D → 3D inclined polycatenation of similar layers as those in .

A robust binary supramolecular organic framework (SOF) with high CO2 adsorption and selectivity.

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.