Eight-Fold Interpenetrating Diamondoid Coordination Polymers for Sensing Volatile Organic Compounds and Metal Ions

Abstract

Reactions of divalent metal salts with 4,4-oxybis(N-(pyridine-4-yl)-benzamide), L, and naphthalene-1,4-dicarboxylic acid (1,4-H2NDC) in various solvents gave [Zn(L)(1,4-NDC)·H2O]n, 1, [Cd(L)(1,4-NDC)(H2O)·MeOH]n, 2, and [Co(L)(1,4-NDC)(H2O)0.5·MeOH]n, 3, which have been structurally characterized. Complexes 1–3 show eight-fold interpenetrating frameworks with the dia topology, which exhibit porosities substantiated by CO2 adsorption, whereas 1 and 2 manifest stability in aqueous environments and show high selectivity toward sensing of mesitylene molecules and Fe3+ ions with low detection limits and good reusability up to five cycles.

Cd(ii) coordination polymers constructed from tris-pyridyl-tris-amide and polycarboxylic acid: synthesis, structures and sensing properties

“…In contrast, the K sv values of the bpba-based Zn( ii ) CPs toward the detection of Fe 3+ ion are 1.9 × 10 4 M −1 for {[Zn 2 (L1)(1,4-NDC) 2 ]·2H 2 O} n [L1 = 4,4′-oxybis( N -(pyridin-3-ylmethyl)benzamide); 1,4-H 2 NDC = naphthalene-1,4-dicarboxylic acid], 5 6.895 × 10 5 M −1 for [Zn(L2)(1,4-NDC)·H 2 O] n [L2 = 4,4-oxybis( N -(pyridine-4-yl)-benzamide)], 27 and 1.89 × 10 3 M −1 for {[Zn(L3) 0.5 (1,2,4,5-BTEC) 0.5 (H 2 O)]·H 2 O} n [L3 = N , N ′-bis(3-pyridylmethyl)adipoamide; 1,2,4,5-H 4 BTEC = 1,2,4,5-benzenetetracarboxylic acid], 28 indicating that the metal and ligand identities and structural type are important in determining the sensing effect of the bpba-based CPs toward the detection of Fe 3+ .…”

Zn(ii) and Co(ii) coordination polymers based on semi-rigid bis-pyridyl-bis-amide and angular dicarboxylate ligands: synthesis, structures and properties

“…Noticeably, bpba contains two pyridyl nitrogen atoms which can coordinate transition metal ions to make multidimensional CPs, while amide groups may interact with incoming guest molecules to exhibit sensing efficiency. 6,7 The combination of rigid polycarboxylate with flexible bpba ligands generates various extended networks with fascinating structural topologies. 8,9 The tuneable structures of CPs responds to external triggers such as temperature, pressure, irradiation, and solvent adsorption and desorption, and the correlated topological shift can be assessed by evaluating the coordination and conformational changes of the linkers.…”

“…Noticeably, bpba contains two pyridyl nitrogen atoms which can coordinate transition metal ions to make multidimensional CPs, while amide groups may interact with incoming guest molecules to exhibit sensing efficiency. 6,7 The combination of rigid polycarboxylate with flexible bpba ligands generates various extended networks with fascinating structural topologies. 8,9…”

Nickel(II) Coordination Polymers Supported by Bis-pyridyl-bis-amide and Angular Dicarboxylate Ligands: Role of Ligand Flexibility in Iodine Adsorption

“…We have been committed to the synthesis and structural characterization of bis-pyridyl-bis-amide (bpba) ligands containing pyridyl nitrogen atoms and amide groups linked by different—(CH 2 ) n —backbones [ 9 , 10 , 11 , 12 ]. Modification of ligand flexibility has been found important in changing the structural diversity.…”