Nanotubular Metal−Organic Frameworks with High Porosity Based on T-Shaped Pyridyl Dicarboxylate Ligands

Abstract

Two nanotubular metal-organic frameworks (MOFs), {Cu(L1)·2H(2)O·1.5DMF}(∞) (1) and {Cu(2)(L2)(2)(H(2)O)(2)·7H(2)O·3DMF}(∞) (2), with novel topologies have been constructed based on Cu(2+), 5-(pyridin-4-yl)isophthalic acid (L1) and 5-(pyridin-3-yl)isophthalic acid (L2), respectively. Two MOFs were characterized by IR spectroscopy, thermogravimetry, single-crystal, and powder X-ray diffraction methods. Network analysis reveals a two-nodal (3,6)-connected (4·6(2))(2)(4(2)·6(10)·8(3)) net and a three-nodal (3,4)-connected (4·8(2))(4)(4(2)·8(2)·10(2))(2)(8(4)·12(2)) net. Interpenetration is inherently prevented by both of the topologies of the frameworks. The porosity of MOF 1 was confirmed by N(2) and CO(2) gas adsorption investigations. MOF 1 exhibits remarkable hydrogen sorption hysteresis at low pressure and a H(2) uptake capacity of 1.05 wt% at 77 K and 1 atm.

Syntheses, Structures, and Electrochemical Properties of Two Bis‐triazole‐bis‐amide‐based Copper(II) Pyridine‐2,3‐dicarboxylate Coordination Polymers

“…The first weight loss is observed in the temperature range of 75-130°C, corresponding to the release of two coordinated water molecules (for 1: obsd. 5 [7] The third weight losses of 1 and 2 commence at 246 and 254°C, respectively, which are assigned to the decomposition of the 2,3-pydc and dtb/dth ligands. The final residues of 14.86 % (1) and 16.36 % (2) are in rough agreement with CuO (calcd.…”

Ligand and Metal Effects on the Stability and Adsorption Properties of an Isoreticular Series of MOFs Based on T‐Shaped Ligands and Paddle‐Wheel Secondary Building Units

“…In this work we aimed to investigate the stability and gas adsorption properties of two series of isoreticular MOFs based on divalent metal ions (Co 2+ , Cu 2+ , and Zn 2+ ) and two comparable T‐shaped bipolar ligands . The two ligands each have two carboxylic coordination donors but differ in their third coordination donor; one is pyridine and the other is pyridine N ‐oxide (Scheme ).…”

Porous zinc(II)-organic framework with potential open metal sites: Synthesis, structure and property

“…Nevertheless, the metal sites are coordinatively saturated in these structures. In order to achieve MOFs with structure avoiding formation of {Zn 4 O(O 2 C) 6 the free coordinated carboxamide group can serve as hydrogen bonding acceptors and donors, which may increase the stability of the porous structure; and (4) the coplanar rigidity of the ligand with acyl can significantly increase the interaction between the gas or guest molecules and pore internal surface thus enhancing the adsorption quantity [13][14][15][16][17][18][19][20][21][22] …”