Zinc and copper coordination polymers with 4,4′-bipyridine and 2-sulfoterephthalate: infinite polypseudorotaxane and unprecedented (3,4,4)-connected trinodal topology

Abstract

Scheme 1 Coordination modes of 2-stp in 1 and 2.

A 2-D coordination polymer incorporating cobalt(ii), 2-sulfoterephthalate and the flexible bridging ligand 1,3-di(4-pyridyl)propane

“…5,7 With the aim of producing materials with either unusual topologies or physical properties, we have recently investigated the formation of new metal-organic frameworks incorporating the rigid but non-symmetrical 2-sulfoterephthalate (2-stp) ligand. 8 This ligand presents a diverse number of potential coordination and bridging modes, along with multiple accessible protonation states due to the presence of both the carboxylate and the sulfonate groups. In addition, the aromatic spacer provides π-surfaces for intermolecular interactions.…”

“…When 2-stp was used in combination with the rigid linear 4,4′bipyridine (bipy) building block both a zinc-containing pseudorotaxane and a 3D copper coordination polymer could be prepared. 8 As an extension of these studies, in the present investigation we have employed the flexible 1,3-di(4-pyridyl)propane (dpp) ligand in combination with 2-stp and cobalt(II) to generate a new 2D-coordination polymer {[Co 3 (2-stp)…”

Two 2D Zinc(II) Coordination Polymers and Their Orange IV Composites: Preparation, Structures, and Photocurrent Responses

“…For the four-coordinated Zn1 atom, the average Zn–N, Zn–O­(water), and Zn–O­(carboxylate) bond lengths (2.016(2) Å vs 1.9743(19) Å vs 1.9237(18) Å) are comparable to those of the corresponding ones observed in other tetrahedrally coordinated Zn­(II) compounds {[Zn­(4-Br-ip)­(bpa)­(H 2 O)]} n (2.016(2) vs 2.001(2) vs 1.951(2) Å, 4-Br-ip = 4-bromoisophthalic acid, bpa = 1,2-bi­(4-pyridyl)­ethane) and [Zn­(aben) 2 (py)­(H 2 O)] (2.021­(2) vs 2.0565(18) vs 1.9619(17) Å, Haben = 4-aminobenzoic acid) . While for the octahedrally coordinated Zn2, the mean Zn–O­(water) and Zn–O­(carboxylate) distances (2.1365(19) Å vs 2.0643(18) Å) are close to those found in [Zn 1.5 (1,3,5-BTC)­(L 1 )­(H 2 O) 2 ]­·1.5H 2 O (2.167(4) vs 2.026(3) Å, L 1 = 1,2-bis­(imidazol-1-ylmethyl)­benzene) and {[Zn­(2-stp)­(bpy)­(H 2 O)­(H 2 O) 0.25 ] 2 ­[Zn­(bpy)­(H 2 O) 4 ]­·4H 2 O} n ) (2.169(4) vs 2.101(3) Å, 2-stp = 2-sulfoterephthalate, bpy = 4,4′-bipyridine), respectively …”

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

“…The MOF [Mn­(H 2 O) 4 (bpmp)]­[Mn 2 (ox) 3 ]·5H 2 O (bpmp = bis­(4-pyridylmethyl)­piperazine) also features similar polythreading of anionic 2D hexagonal sheets by 1D cationic chains . Another example of ionic polypseudorotaxane structure is [Zn­(2-stp)­(bpy)­(H 2 O)­(H 2 O) 0.25 ] 2 [Zn­(bpy)­(H 2 O) 4 ]·4H 2 O (2-stp = 2-sulfoterephthalate), with 2D corrugated anionic sql sheets stacked in AA mode penetrated by 1D linear cationic chains to form 3D architecture with unprecedented (3,4,4)-connected topology . A recent study by He et al .…”