A two-fold interpenetrated microporous bi-pillared-layer framework of Fe(II), {[Fe(2,6-
napdc)(4,4′
-bipy)](EtOH)(H2O)}n (1) (2,6-napdc = 2,6-naphthalenedicarboxylate; 4,4′
-bipy = 4,4′
-bipyridine)
composed of mixed ligand system has been synthesized and structurally characterized. The 2,6-napdc linkers
form a 2D corrugated sheet of {Fe(2,6-napdc)}n by linking the secondary building unit of Fe2(CO2)2 in
the ac plane, which are further connected by double 4,4′
-bipy pillars resulting in a bi-pillared-layer type 3D
framework. The 3D framework is two-fold interpenetrated and exhibits a 3D channel structure (4.0 × 3.5,
1.5 × 0.5 and 2.2 × 2.1 Å2) occupied by the guest water and ethanol molecules. Framework 1 shows high
thermal stability, and the desolvated framework (1
) renders permanent porosity realized by N2 adsorption pro-
file at 77 K (BET surface area of ∼52 m2 g-1). Moreover, the framework 1 also uptakes different solvent
vapours (water, methanol and ethanol) and their type-I profile suggest strong interaction with pore surfaces and
overall hydrophilic nature of the framework. Temperature dependent magnetic measurements suggest overall
antiferromagnetic behaviour in compound 1
