Effect of Organic Polycarboxylate Ligands on the Structures of a Series of Zinc(II) Coordination Polymers Based on a Conformational Bis-triazole Ligand

To explore the influence of six structurally different polycarboxylate ligands H₂L¹ to H₄L⁶ in the system Zn­(II)/btmx, six coordination polymers, formulated as [Zn­(btmx)­(L¹)]_<i>n</i> (<b>1</b>), {[Zn­(btmx)­(L²)]·2H₂O}_<i>n</i> (<b>2</b>), {[Zn­(btmx)­(L³)]·1.5H₂O}_<i>n</i> (<b>3</b>), [Zn­(btmx)­(L⁴)]_<i>n</i> (<b>4</b>), {[Zn₄(btmx)₃(L⁵)₄(H₂O)₂]·4H₂O}_<i>n</i> (<b>5</b>), and [Zn­(btmx)­(H₂L⁶)]_<i>n</i> (<b>6</b>), have been obtained under similar conditions (btmx = 1,4-bis­(1,2,4-triazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene, H₂L¹ = 1,3-benzenedicarboxylic acid, H₂L² = 1,4-benzenedicarboxylic acid, H₂L³ = 1,3-adamantanedicarboxylic acid, H₂L⁴ <b>=</b> 1,3-adamantanediacetic acid, H₂L⁵ = 4,4′-oxidibenzoic acid, and H₄L⁶ = 3,3′,4,4′-benzophenone tetracarboxylic acid). The structure determination reveals that complexes <b>1</b> and <b>4</b> are two-dimensional (2D) layered networks and exhibit typical (4,4) topological nets. Complex <b>2</b> shows an undulating 2D (4,4)-network with 2-fold interpenetration. Complex <b>3</b> possesses a three-dimensional (3D) 3-fold interpenetrating 4-connected framework of 6⁶-<b>dia</b> topology. Both <b>5</b> and <b>6</b> have different 3D interpenetrated motifs generated by 2D → 3D interpenetration. Complex <b>5</b> belongs to a 3D framework built from the interpenetration of 2D bilayers in an inclined mode, while <b>6</b> involves a parallel interpenetration between the adjacent 2D (4,4) layers. This work markedly indicates that the effect of polycarboxylate ligands is significant in the construction of these networks

Effect of Organic Polycarboxylate Ligands on the Structures of a Series of Zinc(II) Coordination Polymers Based on a Conformational Bis-triazole Ligand

To explore the influence of six structurally different polycarboxylate ligands H₂L¹ to H₄L⁶ in the system Zn­(II)/btmx, six coordination polymers, formulated as [Zn­(btmx)­(L¹)]_<i>n</i> (<b>1</b>), {[Zn­(btmx)­(L²)]·2H₂O}_<i>n</i> (<b>2</b>), {[Zn­(btmx)­(L³)]·1.5H₂O}_<i>n</i> (<b>3</b>), [Zn­(btmx)­(L⁴)]_<i>n</i> (<b>4</b>), {[Zn₄(btmx)₃(L⁵)₄(H₂O)₂]·4H₂O}_<i>n</i> (<b>5</b>), and [Zn­(btmx)­(H₂L⁶)]_<i>n</i> (<b>6</b>), have been obtained under similar conditions (btmx = 1,4-bis­(1,2,4-triazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene, H₂L¹ = 1,3-benzenedicarboxylic acid, H₂L² = 1,4-benzenedicarboxylic acid, H₂L³ = 1,3-adamantanedicarboxylic acid, H₂L⁴ <b>=</b> 1,3-adamantanediacetic acid, H₂L⁵ = 4,4′-oxidibenzoic acid, and H₄L⁶ = 3,3′,4,4′-benzophenone tetracarboxylic acid). The structure determination reveals that complexes <b>1</b> and <b>4</b> are two-dimensional (2D) layered networks and exhibit typical (4,4) topological nets. Complex <b>2</b> shows an undulating 2D (4,4)-network with 2-fold interpenetration. Complex <b>3</b> possesses a three-dimensional (3D) 3-fold interpenetrating 4-connected framework of 6⁶-<b>dia</b> topology. Both <b>5</b> and <b>6</b> have different 3D interpenetrated motifs generated by 2D → 3D interpenetration. Complex <b>5</b> belongs to a 3D framework built from the interpenetration of 2D bilayers in an inclined mode, while <b>6</b> involves a parallel interpenetration between the adjacent 2D (4,4) layers. This work markedly indicates that the effect of polycarboxylate ligands is significant in the construction of these networks

Effect of Dicarboxylate Ligands on the Construction of Cd(II) Complexes Based on a Flexible Bis-Triazole Ligand

<div><p>In this work, two dicarboxylate ligands, 4,4′-oxybis(benzoic acid) (H₂oba) and 4,4′-biphenyldicarboxylic acid (H₂bpdc) were employed as coligands to perform a comparison on the structures of Cd(II)-btmx complexes (btmx = 1,4-bis(1,2,4-triazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene) motifs. Two new complexes, {[Cd(btmx)(oba)]·H₂O}_n (1) and [Cd(btmx)(bpdc)]_n (2), have been synthesized and characterized. Structural analyses show that 1 shows a 1D double-chain, while 2 displays an undulating 2D 4⁴-<i>sql</i> network with 2-fold interpenetration. The structural differences of the two complexes suggest that the dicarboxylate ligands have great impact on the formation of such coordination architectures. Furthermore, the photoluminescence properties of 1 and 2 have also been investigated.</p></div